Question about 1992 Mitsubishi Eclipse

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Fuel injectors not getting power to spray

Have power at injector but no ground for signal

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Does this vehicle have a immobilisor by any chance ,reason i ask is because different vehciles produced for different countries have bit and bobs that can vary?

Posted on Jan 01, 2013

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Posted on Jan 02, 2017

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1 Answer

My 1999 mercury misquet wont start?


DID YOU CHECK THE SIGNAL TO THE INJECTORS? WHEN YOU SPRAY CARB.CLEANER AT THE T.B. THE CAR STARS?
IF YOU HAVE GOOD INJECTOR SIGNAL, PROBLABLY YOU HAVE DEFECTIVE INJECTORS. REMOVE LITTLE BIT UP INJECTORS RAIL AND LEAVE IT EVERYTHING CONNECTED TRY TO STARTER IT AND CHECK IF THE INJECTORS SPRAY IT.-------- IF YOU DO NO HAVE INJECTOR SIGNAL CHECK THE CONNECTOR WIRES -SWITCH ON COMPUTER SIGNAL AT ONE SIDE,,,,,AND GROUND AT THE OTHER SIDE

Oct 05, 2017 | Mercury Cars & Trucks

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What can be wrong if injectors are not spraying but if i earth it one sprays


Your year--make--model didn't post for some reason? That info would help.
Usually the computer grounds fuel injectors. If problem with rpm signal or antitheft/security system, generally the computer won't ground the injectors. There could be other issues? I need more info.

Jan 08, 2016 | Cars & Trucks

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Fuel injector just quite working


What is year--make--model? Check for voltage and ground at fuel injector. Check fuel pressure.

Dec 26, 2014 | Cars & Trucks

1 Answer

1996 suburban getting fuel. To rail but not


loosen the fuel line at the throttle body to check for fuel, then you will have to check the injectors for power getting to them and for the ground operation. sounds like you may have an injector problem either not cycling or so dirty they can`t spray properly. the ECM grounds the circuit to open the injectors to spray fuel into the intake to burn.

Sep 11, 2014 | Cars & Trucks

1 Answer

Fuel injectors


I doubt it.
The injectors get power from a fused circuit when the key is on.
Then the engine computer grounds each injector when it wants the injector to open.
You would first need to know if the injectors have power, then if they are getting a ground signal from the computer when the engine is cranked.

Feb 06, 2014 | Hyundai Accent Cars & Trucks

1 Answer

Fuel injectors not spray


Are you sure it's not the fuel pump? I would be checking fuel pressure-the injectors need fuel under high pressure against them so they will spray out when pulsed.
What year is your Isuzu, and what size engine? Multiport injection has a higher pressure requirement than throttle body injection.
There should be a fuse for the injectors, check that. With key on, not start, the injectors would have power to them on the "injector drive circuit". In other words, constant power is supplied to the injectors when the key is on. The other wire at an injector is the ground wire. The ground wire goes into the engine computer. When the computer internally grounds the injector wire for a split second, the injector is energized and fuel is able to spray out.
Post back if you need help checking the injector circuit-both the power side and the ground side. You can check both with a test light.

Well, here it is anyway: ground a test light and probe the injector connector. With key on, one terminal should be hot-the drive circuit. Now move the test light lead to the POSITIVE battery post, and stick the test light probe into the injector terminal that did not light the test light-the ground terminal. Now have someone crank the engine over. If ground circuit is working, the test light should be blinking-meaning the computer is properly grounding the injector circuit. If both tests are good-a steady light on the power side (key on) and a blinking light on the ground side (engine cranking), the injector circuit is good.

Jan 28, 2014 | Isuzu Cars & Trucks

1 Answer

I have replaced the fuel pump on my 1991 chevy cheyenne im getting fuel to the injectors but they aint working


Check the injector fuse. With key on, injectors should have constant power available to them on one wire. The other injector wire is ground wire. With constant power to injectors, all it takes to pulse the injectors is for the computer to ground the injector ground inside the computer for a split second, and pulse occurs, causing fuel to spray out the injectors.
So if injectors aren't working, either the injector drive circuit (the power to injectors) or the injector ground circuit is lost. You can buy a cheap "noid light" at any auto parts store, and check the injector circuit. Just plug the light into the injector connector and crank the engine over. If the light is blinking, circuit is good. If no light, the circuit has a problem, either on the drive side or the ground side.
Here's a way to check the ground circuit separately. Use a test light clipped to the Positive battery post. Probe the ground wire terminal of the injector connector while the engine is cranked over. The test light should be blinking-meaning the computer is grounding the circuit normally and would be causing the injectors to pulse, if power is available to them.

Aug 19, 2013 | Cars & Trucks

1 Answer

Fuel injector wont pules


Try to provide a ground for the PCM. Find the ground wire for the fuel injector circuit at the PCM connector and short it to ground. The PCM gives the injectors their signal, if it works and starts the vehicle, then you will need a PCM. If not, then it will be a wiring issue somewhere in the harness.

I hope this info helps!
~subyguru~

Sep 21, 2012 | Buick Roadmaster Cars & Trucks

1 Answer

I have a 1991 toyota pick up that won't start. I have spark the and it seems as the truck wants to start but i don't think its geting fuel. Fuel preasure is good. what should i check next?


An injector pulse tester is called a "noid light". You plug it into the injector connector, and, cranking, it should flash, or blink. Try it on each injector connector.Buy them from any parts store. Blinking light means you are getting power to the injectors. The igniter tells the computer when to ground the injector signal, so it will operate and spray fuel into your cylinder. goodluck.

Oct 11, 2011 | 1989 Toyota Pickup SR5

1 Answer

1987 f 150 getting fuel threw fuel rail back


eec relay? Is there power to injectors? blinking ground on injector? with test light? fusible link problem?

Feb 17, 2010 | 1992 Ford F150 SuperCab

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