Miata Injectors Not Firing

Search engine use with the words MIATA SHORT NOSED CRANK should get you more reading than you wanted. Either the fuel injector is defective or the injector isn't receiving a signal. I'm not sure on this, but don't I thought the injectors had constant power, and got a signaled ground that made them open and close. is there anything else i could check? so far ive checked the fus. Save up to $5,146 on one of 627 used 2016 Mazda MX-5 Miatas near you. Usually a bad or failing fuel injector will produce a few symptoms that can alert the driver of a potential issue. View and Download Mazda 1990 MIATA manual online. I can't help but think the ecu is toast unless there is a fuse or something else in line. 27 for the Mazda 6. i have figured out that one injector bank is not firing. Order Mazda Miata Relay - Fuel Pump online today. Find local 2006 Mazda Miata prices online. Now, if you get a flashing light when you're cranking it means the injectors are getting power and you either have a fried or clogged injector. How to make a great car even greater. When you experience rough performance from your engine or failure to reach full RPM, it's time to take a look at your fuel injector. If I have an injector problem. If the injector is open or the resistance is higher or lower than the spec, replace the fuel injector. Checked all the connections between the TFI and the injectors and they seem fine also. So, if your Miata is 94 and above you should start off with sequential injection from the start. After that one last run none of the cylinders have fired, except very occasionally when the cold start injector fires. When I crank the motor over, it does not. Can any one help. Can feel it clicking. The amount of fuel delivered to the engine is regulated by length of time the solenoid is energized (pulse width). The injectors have 8 individual ground circuits. The e38 ecu im using is from a manual 2010 model vehicle #12633238 the os is 1250230 I have disabled VATS 1 & 2, disabled the starter checks, under the systems tab i have disabled the starter diag and the clutch interlock. Don’t suppose anyone has a decent injector wiring loom going spare for a non cat car? Andy. Engine misfires and decrease in power, acceleration, and fuel efficiency. If the engine rpm does not decrease, replace the injector. The result from is table lookup is modified by the 'Injector Timing Multiplier' (aka IDKMUL) and 'Injector Timing Delay' (aka IDKADD) parameters. What this effectively does is alter the firing order of the injectors so all 3 injectors per side fire at once (batch-fire mode). Has power to injectors. We offer competitively priced Ultrasonic Fuel Injector Cleaning in the continental U. I'm not sure on this, but don't I thought the injectors had constant power, and got a signaled ground that made them open and close. If you are getting 13. Changed out the cam shaft sensor but my injectors are still not firing, the plugs are dry, the engine will try to run on starting fluid. Everything is brand new and hooked up correctly (maybe!!). I have great pressure at the fuel rail. Application Primary Secondary Miata. the problem i am having is that i replace the fuel pump relay under the seat and the only way the pump will cut on is the by pass the relay. Besides, the injector puller makes it so easy, just slide it underneath the lip in the injector housing and pop the injector out. If the specification calls for 3 ohms and an injector measures only 1 ohm, it will pull more current. It plugs into the injectors harness and will flash to indicate the pulsed signal to the injector. Page 1 of 2: How to test the fuel injectors. I'm not sure on this, but don't I thought the injectors had constant power, and got a signaled ground that made them open and close. Duty cycle is the percent of time that the fuel injector is open versus the total time between firing events. Both the intake and exhaust valves are closed when both rocker levers are loose. When an injector is not flowing at an optimum rate it causes the o2 sensor to read the unburnt oxygen resulting in a lean condition. This is for when a Miata just decides to roll over and play dead, not when you send the car to the firing squad. Therefore, it is possible to have a perfectly pulsing noid-light and a defective injector driver inside the ECM. I put a home made LED tester that tests if the injectors are firing and they are not. It seems any infomation i try to find on this does not exist. Can indicate the start or end timing point of the injector pulse depending on the setting of the 'Injector Timing Edge' (aka INJREF) parameter. The Grams throttle body is a Plug-n-Play direct OEM replacement that does NOT require swapping electric motors, wiring or mounting adapters. i replaced both of them and the starboard still was not firing, the driver in the new ECM was bad. Browse your favorite brands affordable prices free shipping on many items. I put some fuel injector cleaner in the car. I bought a remanufactured engine. A multimeter would do the same thing however I'm not sure if a quick injector pulse would be long enough to register a voltage on it. Sometimes Fuel Injectors Clog and it does not take much for this to happen. When the FICM fails, the vehicle may stall or not start at all. If not, there's probably an open or short in the harness. has a service code po203 Injector circuit fault. Car was bought from the original owner in LA, who searched far and wide for the perfect platform to build on. Anyway my injectors arent firing for the tbi. Search engine use with the words MIATA SHORT NOSED CRANK should get you more reading than you wanted. Help! EJ20 injectors not firing Subaru Conversions. We receive many calls and enquiries about whether our system offers sequential injection. It has a bad miss the piston isn't firing | Find answers to your 1991 Mazda Miata MX-5 question from certified mechanics and auto experts. Use a small wire brush to clean the terminal contacts, if corrosion is found. I'll replace all the fuse and relays - these are parts which don't cost much anyway so it won't be bad in terms of money. This is because EV14 injectors are completely different technology, so it's not just that 640cc injectors will flow 3x as much at any point, but they will flow relatively different volumes at different duty cycles. The fuel rail is the next item to remove. When an injector is not flowing at an optimum rate it causes the o2 sensor to read the unburnt oxygen resulting in a lean condition. Get the best deal for Fuel Injectors for Mazda Miata from the largest online selection at eBay. Sequential Injection Realities. These power levels will require a new clutch too, the stock one will not hold. 6 miata engines I rush of air and the injectors firing to make up then suddenly no air and a too rich. It could use some driveability tuning and there is plenty more power to be had as fueling is very safe and timing is extremely conservative. Shop Miata Brakes: Tires: P185/60R14, 82H steel-belted radial: Shop Miata Wheels: Engine; Engine Type: In-line 4-cylinder, DOHC: Shop Miata Engine Parts: Engine Displacement: 1. Miata (1) 128 (9. Bruce and Al get several inquiries a week on the JectorRate FI driver setup, enough that we think that adding this mode. I have checked and there is spark, there is fuel pressure in the FI rails, and the injectors themselves are good (I pulled one out, and hooking a 9V battery to the terminals I got a solid squirt of gasoline). Now, if you get a flashing light when you're cranking it means the injectors are getting power and you either have a fried or clogged injector. someone please school me on this. 92 mazda miata not pulsation in the injectors. If I have an injector problem. But I'd unplug the first fuel injector and put a test light or a meter across the terminals and have someone turn it over. - Mazda 2002 MPV question. You can back off the gas and then kinda sneak up on it slowly and it will get past the sputtering or bogging down sound and take off like its brand new. Though many users of MS would spend 100. The solenoid is engaged when a 12-volt current is provided by the electronic fuel injection system. By Travis Okulski. jaguarfuelinjectorservice. A week later, I go to pull it out, and it won't start. Feels like the injectors are still not firing and the 5th injector was flooding the engine which allowed it to run for a few seconds and with the easy start that made me think it's still the injectors. If you want more boost, you can use the 230cc injectors of the 1. I believe the ECM doesn't know the engine is turning over and thus not firing the injectors. Reaming glow plug should not cause the car to 'unstart' for 30 sec unless you removed the hard lines getting to the GP. Remove the ring terminals from each injector, and put the DMM into a low ohm range. 2008 Mazda MX-5 Miata Grand Touring 2008 ENGINE Fuel System - MX-5 Miata Microsoft. The amount of fuel delivered to the engine is regulated by length of time the solenoid is energized (pulse width). Bruce and Al get several inquiries a week on the JectorRate FI driver setup, enough that we think that adding this mode. Dry firing is activating the Injector with either an empty Syringe or without. If the compression and spark are good and you have a signal to the injector, it still could be a clogged injector. fuel injectors not firing Post by skunkmann » Tue Apr 22, 2014 5:47 pm hi i have a no start condition on my 92 f150 5. ) I like to use an old injector with compressed air applied to the injector where the fuel rail would normally connect. only found in the 1. Design Engineering, Inc. The power series for those who are budget minded! The BTP-S turbo system is the perfect place to start when turbo charging your Miata. Checked all the fuses there all ok, there is a spark, it nearly started earlier as i took all the injectors out and when i turned the ignition fuel splilled out into the manifold, so when i tried starting it up again it nearly fired. The engine runs as. They act the same than a clogged injector. A dead fuel injector is an injector that does not have resistance and does not respond to electrical input. Mazda Miata 1990, High-Performance Fuel Injector Kit by Grams®. Tho the TPI system is not a sequential fuel injection system, and therefore all 4 injectors on each side fire at once, I suggest marking the locations (from 1-8) of the respective plug-to-injector, which will make it easier for reassembly and routing of the wiring. This is because EV14 injectors are completely different technology, so it's not just that 640cc injectors will flow 3x as much at any point, but they will flow relatively different volumes at different duty cycles. One of the most common failures occurs when an injector body becomes cracked. I put a home made LED tester that tests if the injectors are firing and they are not. This requires injectors to pulse shorter so as to not overfuel the engine and cause a rich condition. With those injectors, boost can be turned up to about 11psi. These cups are just as difficult to. 1990 Miata will not turn over The last two days my 1990 miata struggled to crank for a few seconds then cranked on. The injectors are always supplied 12V on the red wire and the white or tan (depends on which side) will get a pulsed signal from the PCM. If you already determined "injectors do not get power", then there is no need to guess - its ECU or wiring harness between injectors and ECU is at fault. Mazda's Miata not only revived a segment thought dead--the affordable roadster--but it managed to crush the subsequent competition while wearing a goofy (if bemused) smile. If acceleration has diminished, it should be felt. With three "stages" to choose from—The DIY Turbo KIt, The DIY Turbo w/intercooler kit, The Complete Turbo w/intercooler, injectors, & ECU—there is an option for everyone. I just replaced the Oil Pressure Switch after finding that my pickup pump wasnt working. If the engine rpm does not decrease, replace the injector. When you turn the key to "START," what happens? If it cranks, don't bother reading this, just go to Step 2. We receive many calls and enquiries about whether our system offers sequential injection. For the Miata we offer one of the most extensive selections of Miata performance and appearance products available from any one manufacturer. com and affiliated sites. MS default is batch fire, meaning two injector fire at the same time. Miata P0304 OBDII Code Symptoms. I Found one of the tips was not attached properly. Get the best deal for Standard Motor Products Fuel Injectors for 1999 Mazda Miata from the largest online selection at eBay. Fuel pressure is good on rail, but injectors don't appear to be firing, cause when I spray in - Answered by a verified Ford Mechanic fuel injectors not firing. Would that be a problem? Car cranked and ran great but once in got hot a feel a random misfire. I believe the ECM doesn't know the engine is turning over and thus not firing the injectors. Power is to injectors, balist resitiors are fine. This test will tell you if the computer is pulsing the fuel injectors open when cranking the engine over. i sprayed starter fluid in the intake and it does start. This page shows you how…. I'm not sure if there is a fuse for the painless harness for the injectors or not, but that's a common no fuel problem on the stock TPIs. If that is the case I'm not certain as to how the injectors get their ground, but I know on most engines the injectors have a constant hot and PCM is what grounds the injectors so they fire. Won't start - posted in Spec Miata Garage: Here's the issue. The pcm grounds out the injector circuit to fire the injectors. The additional amperage required to open the injector can overheat the ECU causing permanent damage. Here’s how you can test the fuel injector in your car yourself instead of taking it. I checked for power and I'm only getting 5v through my Yellow/Black wire at the resistor box. Note: For 2. batch-fired injectors (all at once), it appears that pictures can save thousands of words slung around in vain. This page shows you how…. please help me. 0t TSI Bosch Fuel Injector. That's not a problem. When it comes to a Mazdaspeed, we take power seriously. it will bog down and sound like sputtering. 6 miata engines I rush of air and the injectors firing to make up then suddenly no air and a too rich. I got CHN613 that has white smoke and takes a lots of oil and has no leak I’ve changed the whole head cuz there was oil in the manifold but still smokes and takes lot of oil not sure if it’s the turbo or the piston ring or something else. it either starts perfectly or starts after much cranking, then runs really well with no hint of fueling problems. Flyin’ Miata Boost Gauge, Flyin’ Miata Dual A/F and EGT Gauge & Dual Oil and Water Temp Gauge AEM Gauge-Type Wideband O2 Sensor AC compressor replaced (2007) Mazda in-dash 6-disc changer Notes: - Passes DEQ in Oregon (warm up with a nice drive before going. Throttle Body Injectors, Direct Injection, and Multi-Port Injectors. So i know its not injecting fuel i just dont know whats causing it not too. I'm very new to angularjs and I'm following one of Pluralsights tutorials. If you still don't have a signal at the injectors recheck the voltage at the injectors then check for ground on pin 2A of the ECU that is the ground input that is supplied to the injectors to fire. This is in a 2010 Camaro, 18 lbs boost on a TVS2300, squash twin fuel pumps on a return system, wet nitrous with direct port injection. For example, you’ll connect the injector outputs as follows for a typical inline four cylinder engine with a 1-3-4-2 firing order. Injectors are not injecting fuel. f6sk None 11/23/13 3:48 p. But lets make this as easy as possible. With the new engine installation, the injectors are not firing at all. Fuel injectors "fire" sequentially (in engine firing order) once per complete cycle. Note: For 2. I have a 89 mustang gt in the middle of the engine change. please help me. Step 4: Calculate Your Optimum Injector Size. Can any one help. Damping adjustment at the top. When I hard wire the injector to the battery, it shoots gas. For example, you'll connect the injector outputs as follows for a typical inline four cylinder engine with a 1-3-4-2 firing order. Check the clean air crossover tube for leaks and cracks. I believe the ECM doesn't know the engine is turning over and thus not firing the injectors. Replied by K5mudlife on topic Fuel injector #3 not getting a pulse signal~ K so how i would aproach this is first make sure you have voltage to the injector, normal systems work where they have constant power and the pcm pulses a ground, so if you take your dvom and back probe the fuel injector connector you should see batt voltage. So I have narrowed it down to the fuel injector leads, but now I am lost and not sure where to go next. Ignition coil and ignition module were good: We can assume the ignition module and ignition coil were good since Jim did not report any lack of spark. Is it a 240D?. I'm not sure if there is a fuse for the painless harness for the injectors or not, but that's a common no fuel problem on the stock TPIs. The engine runs as. At idle, the injectors are on for about 10 ms and off for about 110 ms, so the duty cycle is about 8%. it fried another ecm! this is the 2nd one know and it seems like it does it when under a heavy load. Tackle problems early to protect your vehicle's performance-install a quality Mazda MX-5 Miata fuel injector from AutoZone to revitalize your wheels. If resistance is not within specifications, you've found a bad injector that needs to be replaced. Explained I've got 1 injector not firing, he checked my name, and got a new one sent out, no questions asked. FN1315 - Defines the injector firing timing point from TDC. I cleaned injectors and changed plug in 1. but the fuel injector pulse on the 800/900 engines requires the cam sensor for it to know which cyl is at TDC if it doesn't. Here are some tips that can help you along the way. The World's Largest Community of RX-7 Owners and Enthusiasts. nSymptoms of a BAD Fuel Injector. Typically, when injectors fail, the solenoids often short internally causing a drop in resistance. By contrast, when a naturally aspirated engine is wide open throttle, the manifold pressure is not in vacuum or in boost, so the effective pressure is the 58psi of rail pressure and nothing more. 5mL Syringe-0. This is because EV14 injectors are completely different technology, so it's not just that 640cc injectors will flow 3x as much at any point, but they will flow relatively different volumes at different duty cycles. Injector 4 peak. This page shows you how…. Not Using SST (M-MDS or Equivalent) 1. 1992 Mazda Miata mx_5 1. The stock configuration is a batch-fire mode anyway, but wiring three injectors onto one lead both changes the firing order and shortens the overall wiring. I bought a remanufactured engine. 0: Rancho 9k's, SuperChipped, Stock otherwise. 2006 Mazda MX-5 Miata Engine Problems. Checked continuty from the ecu to the injectors and wires test good. Buy with confidence! If for any reason you're not completely satisfied with an item, simply return it within 30 days and the purchase price will. After diagnosing it we realized the starboard injector was bad. I am unsure of the EXACT model name for the burner, but have included a photo of it's label. Power is to injectors, balist resitiors are fine. I have a 850 wagon non turbo. The voltage supplied to the injectors is 115 volts DC and is only activated when one of the injectors is firing. fuel pump is good and getting past filter. But lets make this as easy as possible. Might have mixed up and swapped injector 1 and 2. Hey guys/gals I got a problem I need some help with. I tried starting it and it turned over np but would not crank up Like it was dry so of course imma start with fuel filter to the pump and hopefully it's not an injector prob if it was most likly it would have atleast started and made noise my truck only has 127000 miles Question for anyone. type of piston rings b. injectors not firing. At its worst, the cylinder is not receiving proper air and oil. At first the electric drivin fuel pump wouldn't go so I r. 6L engine is not hard. The #1 piston is not firing, what would cause it? - 1991 Mazda Miata. I am pretty sure that the injectors are grounded thru the ecu but they are just not getting it. I believe the ECM doesn't know the engine is turning over and thus not firing the injectors. Injectors Not Firing: Crank engine while listening for clicking from injectors. They free up gunk that clogs your fuel filter and do little to help injectors (not enough solvent, and enough solvent can damage rubber hoses, etc. I can get the injectors to fire by jumping them at the plug that hooks up to the ecu. If you are certain the injectors aren't firing at all then this would not be the problem anyway. They can clog up, which will decrease the spray inside the cylinder. Tested at the individual injector connectors, and read the proper voltage as well. The additional amperage required to open the injector can overheat the ECU causing permanent damage. The pump gushes out fuel from the tank so i dont know wassup with the green fitting having no pressure none of the lines look kinked or broken. Should I just change all injectors. I currently have the upper intake off and the injectors pulled out. 200whp is a good achievable number. ) A Noid light available from Autozone, is one way to test the injector wiring. New ICM & pickup on the distributor. Cranks, no start - Injectors? - posted in Spec Miata Garage: Id really appreciate some help here, as Im banging my head against a wall and have wasted a ton of time trying to figure this out. It builds oil pressure per the gauge. I expect that James meant for you to post the log file, not a snap shot. When an injector is not flowing at an optimum rate it causes the o2 sensor to read the unburnt oxygen resulting in a lean condition. The fuel injector, an electrically operated gate, delivers fuel into the engine via its nozzle. Fuel Injector Size Calculator (Other Fuel Injector Calculators have been moved to individual pages, check out the list HERE it's near the bottom of the page) To use the Fuel Injector Size tool to select the correct size injector for your engine, fill out the above form with the specified data. The solenoid is engaged when a 12-volt current is provided by the electronic fuel injection system. When original replacement units are not available or if the design is known to be problematic, AUS Injection offers upgraded injectors which may differ in appearance but are guaranteed to perform as good as or better than the OE injector. For the Miata we offer one of the most extensive selections of Miata performance and appearance products available from any one manufacturer. Test light shows voltage at injectors during cranking. Sequential injection means firing each injector separately. Shop Miata Brakes: Tires: P185/60R14, 82H steel-belted radial: Shop Miata Wheels: Engine; Engine Type: In-line 4-cylinder, DOHC: Shop Miata Engine Parts: Engine Displacement: 1. The fuel side of the 7. I have a 850 wagon non turbo. Design Engineering, Inc. That means it may overheat and seize. Bruce and Al get several inquiries a week on the JectorRate FI driver setup, enough that we think that adding this mode. It would be better if you just used a lamp. I can't help but think the ecu is toast unless there is a fuse or something else in line. It’s not hard to remove your injectors (empty the fuel lines by starting the car with the fuel pump fuse pulled). On the Fords there are relays for the fuel pumps and ECM that are known to go out. fuel pump is good and getting past filter. If the specification calls for 3 ohms and an injector measures only 1 ohm, it will pull more current. Miata won't start. The fpr is attached to your WRX motor I hope. How to check fuel injector pulse using a noid light This is a awesome test because it can be done very fast using a very inexpensive tool called a Noid light. unless they replaced. So i know its not injecting fuel i just dont know whats causing it not too. I have a 1988 Fod E250 that will not start. As before I am ohm tested harness from head to IDM and tested good. The only other thing is the 4x4 is not switching, it’s stuck in 2x4 at the moment. How to Test Fuel Injectors. They free up gunk that clogs your fuel filter and do little to help injectors (not enough solvent, and enough solvent can damage rubber hoses, etc. Is the ECU Bad? Ok so i finially got project miata back together after we filmed this show. These are known to fail and cause engine running issues. It is possible for the injector to cause issues even if it is receiving the correct voltage. Leaking injectors and some dead injectors can be missed even when an injector is disabled. At its worst, the cylinder is not receiving proper air and oil. If the car is not firing on all cylinders how do you fix it? Can be bad spark plugs, defective coils, bad fuel injectors, defective spark plug wires, etc. Symptoms of a clogged fuel filter include engine stalling, hard engine start, no engine start, reduced fuel flow, erratic engine performance and decreased fuel consumption. SYSTEM WIRING DIAGRAMS Article Text (p. Welcome to the latest & greatest online Miata Club! If you are not signed in & have not registered you are only seeing HALF the forum! Sign in & register NOW to see ALL of the extra special sections we have for members only! If this is your first visit, be sure to check out the FAQ by clicking the link above. I have replaced the cam sensor, crank sensor, and coil. ) I like to use an old injector with compressed air applied to the injector where the fuel rail would normally connect. Reaming glow plug should not cause the car to 'unstart' for 30 sec unless you removed the hard lines getting to the GP. 900+ code, also see this document Injection_Test_Mode_Procedure. This happened on 2 different vehicles. This comparison must separate the two components of electronic engine-. even when bypassing the relay the fuel goes in the lines but nothing works with the injectors. Common rail is much more flexible in these aspect since Common rail does not rely on the camshaft for each injection. Plugs are bone dry. 3 L GM engine can last for a long time. The factors that affect injector deposits basically fall into three categories: (1) properties and chemical composition of the fuel properties, (2) local fuel temperature of the geometry and (3) the injector nozzle and internal fuel wetted surfaces. Thank from the onset with the muscle cramp. When cranking the blue and green wires will not fire. If you already determined "injectors do not get power", then there is no need to guess - its ECU or wiring harness between injectors and ECU is at fault. I put a second IDM on it and same thing all left side injectors are still not firing. A clogged fuel filter does not properly prevent dirt and debris from entering the fuel delivery system. I currenty have an ls3 crate engine which has a cam only, 237/248 @. NEVER use a test light as a noid light. checked the fuel injector fuse and the egi main relay, all ok. Another thing the wiring diagram shows is that the 325 only has six injectors. The atomized spray pattern is obtained by the shape of the injector pintle. In addition, the injector’s opening and closing times may become unstable creating rough engine operation and possible lean misfires. Need help with a 94 Ranger. Home » Flow Calculator; Looking for 500 horsepower to the rear wheels? How about 1000 horsepower at the crankshaft? You can determine what size fuel injectors you will need by entering a few simple details into our calculator. As before I am ohm tested harness from head to IDM and tested good. Check out free battery charging and engine diagnostic testing while you are in store. After some initial troubleshooting I found the following; spark is fine, does not seem to be getting any fuel into the cylinder. An important thing to understand when finding the location of Cylinder 4 is that it’s going to be the 4’th cylinder in the firing order of the vehicle, and not the 4’th cylinder that you might see when looking at the engine. Injectors should fire twice for each revolution of the engine. Injectors not firing, not a clue why So, I am new to the miata world. I have great pressure at the fuel rail. If not, the suggestion to look for 13. I'm more concerned with this. ) I like to use an old injector with compressed air applied to the injector where the fuel rail would normally connect. The most recently reported issues are listed below. They cleaned the injectors, just to be safe, but 8 months later is doing it again. 92 mazda miata not pulsation in the injectors. Main board INJ1: Cylinder 1. com » Technical, repair and troubleshooting » Injectors not firing / how to test ecu and harness Message [Page 1 of 1 ] 1 Injectors not firing / how to test ecu and harness on Fri Sep 06, 2019 11:52 am. But lets make this as easy as possible. My fuel injectors are not firing. Last plated in 2004 It had a new rear diff installed in 99 and was parked till 04. The fuel injector is the main actuator in a modern fuel injection systems. Twice it has set for a week and upon my return it will not fire to complete the crank. 2mS injector pulsewidth. Symptoms of a clogged fuel filter include engine stalling, hard engine start, no engine start, reduced fuel flow, erratic engine performance and decreased fuel consumption. One of the parts of your car that needs to be checked and maintained is the fuel injector. I have 12v on some of the injectors wires and 3v on the other. If you have a 90-97 Miata and do not have factory NB mounts and hardware, you can just add them to your Xida order for a complete ready to bolt in system. The safe duty cycle is 0. Over time, the insulation around the injector coil can corrode causing the coil to short out. This is most evident from black smoke and a drop off in bottom end power (off idle – although the gradual decline might mean the owner does not notice). I currently have the upper intake off and the injectors pulled out. The nozzle is designed to atomize the fuel or to make as fine a mist as possible so that it can burn easily. If resistance is not within specifications, you've found a bad injector that needs to be replaced. Browse your favorite brands affordable prices free shipping on many items. Find out why diesel fuel injectors fail and how to avoid it as we see if the injectors are the problem. i had to continuity test all the wires on the fuel ecu and relay then trace all the wires from the relay to ignition switch and search for cut wires under the dash to wire my ignition switch/fuel relay in correctly. The injectors are firing on the rail when I hold them over a bucket. Does anyone else have ideas? Where can I get wiring schematic for injectors. 22R EFI swap, injectors not firing. type of piston rings b. This means you may not be able to visually tell a difference between heat ranges. Set your digital multimeter to an appropriate value on the Ohms scale according to the resistance specifications for your particular fuel injector (usually, you need to set the multimeter to read at least up to 30 Ohms). So, check in often to browse our entire line of Spec Miata parts. When you add a supercharger, you need more fuel at a higher pressure. The truck will not start. Fuel Injectors Leaking Injector.