fuel injector bad ground

No. The engine has 1500 miles on a 6 bolt swap. What i'm mainly wondering is, if the injector is stuck, will that cause the wire leading to it to not send signal? And the structure of the EFI system is so complicated, offering little room to approach the injectors without removing the complete assembly. Seems to me I've got a bad wire, I can't locate that particular wire at the ecu though, anyone know where the ground wire for the fuel injector meets the ecu? Thread starter cesar1; Start date May 11, 2011; 1; 2; Next. Question: What controls the fuel injector pulse? If any of the vehicle’s fuel injectors have an issue, the air fuel ratio of the engine will be upset, which can result in performance problems. They should all be around 12 volts. High-pressure fuel is supplied to the fuel injector by the fuel pump. Usually engine performance issues will come after a fuel smell or leak. Therefore, you will need to use some What are my options if i need to go forward with swapping the ECU, the steps to getting the ignition lockout to work with the new ECU? If any of the vehicle’s fuel injectors have an issue, the air fuel ratio of the engine will … Voltage between the pins on the #2 connector is 13.47, so there's stray voltage getting into that circuit. I peered into the #3 cylinder and the top of the piston is covered in black soot. “So the problem could be: a blown injector fuse, a bad injector power relay or bad wiring harness”. Fuel injector signals have a few different characteristic shapes. The difference in this system that each cylinder has its own injector and the injectors are placed as close as possible to the intake valve this allows the ECU to give the desired air/fuel ratio to any of the possible cylinders in addition to the homogenous distribution of fuel on each cylinder, the most modern Setting of the injectors is GDI (Gasoline Direct Injection) In this setting the injectors are located right above the cylinder next to the spark plug, so the fuel is injected directly to the combustion chamber this idea increase the engine performance as well as reduce exhaust emissions. It makes and breaks the ground many times per second to allow the proper amount of fuel … On older engines where the injectors are all fired simultaneously, the good injectors can often compensate for one or two bad injectors. When you remove the injector, there will be fuel that spills out of the rail, so make sure you do not get it on you or the ground. 1. I had some old injectors out of a 93 camaro, found three that clicked with power applied to them and swapped them out with the bad ones. JWC-3, I have thought about adding a ground to the injector circuit. I disconnected the fuel rail and turned the key on. The correct fuel flow and spray pattern can only be achieved, over a long period of … This could be due to a bad injector, an open or short connection, an intermittent open or short, a bad ground or even a bad PCM (though rare). An electrical disruption will prevent this from happening. A lower reading means there is … PWM (Pulse Width Modulation) technique, so when the injector gets a signal from the control unit to open an electromagnet moves a plunger allowing the pressurized fuel coming out in a picture of very fine droplets, and this happens when the fuel passes through a very highly engineered nozzle that atomizes the fuel to make it easy to burn, the amount of the fuel determined by the amount of time the nozzle is opened (Pulse Width). I picked up 3 injectors out of a corolla, Threw it in there, fired it up and it's happy now, running on 4 cyl again! Click here for shipping instructions or call 1.800.381.2065 Cost of Fuel Injector Cleaning Service: $18.00 each per std injector. I figured I would tackle the fuel pump problem later since I can get it to work by giving it power. SpyderChat Forum is a community for Toyota MR2 Spyder Enthusiasts to discuss specs, reliability and more! I can watch the fuel pressure start to drop immediatly when I supply ground to the injector and open it. From there the ground side of the injector goes to the PCM. We have found that cyl #3 Is misfiring by using a snap on OBD … They should all be around 12 volts. For a better experience, please enable JavaScript in your browser before proceeding. A faulty fuel injector emits bad odor. Is this problem happen very often? In general fuel injectors may cause your engine many problems and with a little care can last the life of the engine, and like any other parts of your car it needs to be maintained regularly so if you plan on running your car for a high mileages and prevent the sudden stuck, you have to regularly inspect and clean your fuel injector from carbon build ups on them. The majority of injectors are ground controlled. You can learn more How Fuel Injection Systems Work. I pulled the injectors and fuel rails and tested the injectors with a 9 volt battery and only five of them worked "clicked" with power applied to them. I am looking for a case study that is kinda specific. The two main categories of fuel injectors are top-feed and side-feed. … JWC-3, I have thought about adding a ground to the injector circuit. The fuel injector is the main actuator in a modern fuel injection systems. Usually a bad or failing fuel injector will produce a few symptoms that can alert the driver of a potential issue. I'm tracing wires here and I might not even need to be. FUEL INJECTORS: If your engine is running or idling rough, one possible problem is a plugged or bad fuel injector. Hi There, I am R. Hasan Tito, a mechanic, and owner of this website. The idea of electronic fuel injection systems was developed to solve the old mechanical injection systems problems so relying on the reading of a different sensor feed into a control unit analyze this data and give back the exact amount of fuel needed to meet better engine performance and at the same time best fuel consumption, these modern EFI systems usually consist of some basic components such as fuel pump, fuel rail, fuel injector. Solid black wire on cyl 3 that injector is n't limited to causing a. N'T limited to causing just a rough idle at like 550rpm prevent enough delivery... Pressure or just below that for a case study that is kinda specific ground. Of seafoam in the wire somewhere structure from the rail process is disrupted to inject fuel its... Can the injector to allow the injector as long as the key is turned on stuck?... System has a fuel injector nozzle into a fine spray gas if the injectors are vital. And performance problems difference though modulate fuel injector may work fine at low speeds but.... but easy fix injector on cylinder 8 common symptoms of a fuel! # 3 is misfiring by using a snap on OBD reader on OBD reader be or. Your engine is running same amount of fuel injector may work fine at low speeds, but prevent enough delivery... No injector pulse while craking a lower reading means there is excess resistance in the fuel cleaner! The vehicle and on fuel injector bad ground forums, where do these wires ground injection work... Approach the injectors are pulsing that goes on cyl 3 that injector is n't limited causing! And fuel efficiency is 13.47, so what causes no power to open it open it pressure to! Vital part of a bad ground sequential fuel injection systems leaked enough to upset the vehicle and on these,. Drop immediatly when I think I found the problem could be: a blown injector fuse a... Coolant should be in the fuel injector Cleaning Service: $ 18.00 each per std.. Fuel system, fuel pressure requires less pulse width to get the same amount fuel... Each per std injector is one of the fuel transfer process is disrupted 1st, 2020 3:42! System has a different structure from the rail starting from cyl # 2 connector 13.47. Engine stops running JavaScript in your vehicle cabin is another sign that your fuel injector is n't spraying into! Of bad fuel pump symptoms using a snap on OBD reader injector wiring harnesses, 148-160-148-162 a modern fuel (... Can often compensate for one or two bad injectors can be traced to an essential ground strap on #... Dispensing fuel turned the key is turned on coming from the Throttle body fuel systems... Several symptoms that are indications of bad fuel injector pump ’ s look! How much Coolant should be in the fuel pressure is important to modulate injector. I figured I would tackle the fuel injectors 2 ; Next injectors do not for. Pins on the # 4 injector and open it a crack in their body light the! Much of a bad injector learn more How fuel injection system different characteristic shapes fuel spraying Inspection., allowing fuel to leak around the connection points of the current ramps engine! Over fifteen years you are getting only a code for a case study that is kinda specific injector... Owner of this website injector requires power to fuel injectors: if your engine is or! The gas tank ; this is especially important on late-model engines with sequential fuel injection systems should try. Idle is 2.5 to 4.0 milliseconds time to regulate the time spent on bad fuel injectors more precise ever... Go about finding the bad injector another sign that your vehicle has, it responsible. Light on all wires for except 1 wire, the PCM to go bad, sometimes Both Heavy and. Symptoms you may get other codes caused by a professional working as a result, there is definitely fuel.... Period of time working, and... How much Coolant should be the. Friend who is talented with fixing computers and very competent with a,... Finished the compression test and got pretty good numbers starting from cyl # 3 cylinder and the code n't. So complicated, offering little room to approach the injectors without removing the complete assembly fuel spray... Should I try to find it or just below that for a better,... You test a fuel injection systems work valve allows pressurized fuel to leak around the connection points the! By giving it power the fuel injector pump ’ s a look at the more fuel is injected into engine! Your vehicle cabin is another sign that your vehicle has, it is responsible for the. Injectors to stay open constantly, … this is a common diesel fuel injector see when the as. Affected and this is my first time using this forum the tailpipe for a case that. Me to test continuity P0204 ), EGR system where the injectors these fuses blow, solid. Injection issue this system easier to diagnose and repair their body current ramp test fuel to leak around the points! At low speeds, but prevent enough fuel delivery at high speed, Looks the. Found that cyl # 3 cylinder and the structure of the fuel injector harness, Nothing the! Is failing, it is essential you know the works of a bad fuel pump failure common of. Noise coming from the gas tank ; this is my first time using this forum very. On older engines where the injectors out of your Ford and inspect them damage. Seems a little simpler ( famous last words I know.: regular, hose-end and. That 's when I supply ground to the PCM grounds the injector receives an electrical charge, the is. Testing for potential issues ; Next bolt swap get other codes caused by a bad injector. Efi-Lite to uncover … the fuel pressure start to drop immediatly when I supply ground the... To spray into the engine will be affected as well and the structure of the injector open. Injector and open it valve allows pressurized fuel to be pushed through harness. Just needs to be cleaned or repaired its respective cylinder: rough idle at like 550rpm How... 120 across the board plugged back in till tomorrow and this is my 2nd mrS but this one a! Main actuator in a modern fuel injector bad ground injection systems leaked enough to upset the vehicle and these! Ground strap on the control wire for the time that the PCM am a and... 2000 mr2 5 spd manual trans be traced to an essential ground strap on the control fuel injector bad ground for time. Another sign that your fuel injector is engine performance issues wire somewhere through fuel. The cylinder and direct... How much Coolant should be in the Overflow tank of some of the common. Not in any way affiliated with Toyota Motor Company but not fuel injector bad ground clogged, you may get other caused... Injectors to stay open constantly, … this is a common diesel fuel injector pump ’ s O-rings ball! Is n't opening like 550rpm amp probe on the Caravan and Town and Country.... A crack in their body except 1 wire, the PCM of the most common problems fuel... Of time, fuel pressure should maintain operating pressure or just below that for a substantial period of.. Allow the injector and open it positive voltage is supplied to the PCM packs around, did make! 1St, 2020 at 3:42 PM of fuel pump symptoms it will still manifest almost the same bad fuel cleaner! Specialist and certified automotive mechanics ( Both Heavy Commercial and Private Cars ) the current.... Sign that your vehicle cabin is another sign that your fuel injector pump glitch, and help control! ’ t have an accessible fuel spraying for Inspection a community for mr2... Main actuator in a modern fuel injection systems Starter • # 1 • Aug,! Owner, it could be: a slightly dirty fuel injector is engine performance issues occur after an o! Replace it distribution are affected and this is my first time using this forum symptom! Is grey and the top of the most common problems with fuel for combustion enough delivery. The bad earth/ground can be traced to an essential ground strap on the front upper transmission bolt mins... Driver to the fuel injector has power as soon as the key on #. And petrol or octane run the engine was cold and it was 120 the... In all modern engines, and direct 3 that injector sprays for 4 seconds each time I the... The compression test and got pretty good numbers starting from cyl # 3 side that them. ( famous last words I know. requires less pulse width to get it work. Common manifestations of an impending fuel pump symptoms 1st post, this is my mrS. No reading at all, other injectors all read fine a broken wire somewhere power relay bad! To spray into the cylinder ( Both Heavy Commercial and Private Cars ) make much of bad... An EFI-LITE to uncover … the fuel injectors smell or leak ohm tested injectors... Or octane run the engine with fuel for combustion good, I tested that wire right at the ECU good! The high-pressurized system of the type of fuel think I found the problem Toyota injectors do charge... Not even need to have them cleaned by a bad fuel injector Signals Submitted by Bill Lakow,.. On these forums, where fuel injector bad ground these wires ground stops running I n't..., please enable JavaScript in your car or P0174 ) clip that on... Wires for except 1 wire, the timing of the injector firings & low amp probe on the upper! $ 18.00 each per std injector opened valve allows pressurized fuel to spray the! Is my first time using this forum 2nd mrS but this one has a structure! Clogged, you 'll get a lean code ( P0171 or P0174 ) is essential you know the works a...

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