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No signal at injectors - 1987 GMC Jimmy

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2 Answers

No signal to injectors ?


make, model, year? use obdii scanner (1996 & later) to get trouble code if there is? (older model may have manual procedure for this, search). typically the signal/s comes from the computer (ecm, or pcm whichever the mfr. of the vehicle calls it). check fuses, & relays (if any) to the computer. some design, the cam sensor provides signal to the computer to give signal to the injectors..

Oct 10, 2015 | Cars & Trucks

1 Answer

1992 525i, engine turns over but will not fire


check your crank poistioning sensor.is it fuel injected?if it is fuel injected check for injector signal which will tell you thatyour ECM is getting crank poistioning signal and distributer signal,check fuses if there is no signal, bad injector

Feb 10, 2015 | Cars & Trucks

1 Answer

1991 mitsubishi mighty max 2.4 has no injector pulse why?


It could be that your crank sensor is bad or your ecm. your crank sensor sends a small amount of voltage to your computer telling it that you are trying to start your engine the computer in turn sends a signal to the injectors telling them to pulsate because you are trying to start the engine but if your crank sensor is bad and sends no voltage signal to your computer your computer doesn't know you are trying to start your engine therefore it doesn't send the signal to your injectors telling them to pulsate. If your crank sensor is sending a signal to your computer then your computer is not sending the signal to your injectors more likely a grounding issue through the computer I have seen this before let me know how it goes.

Aug 26, 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

1995 Chevy truck 5.7 getting spark but no pulse to injectors when trying to start.


Interesting. The ignition module sends a signal to the computer which grounds the injectors. The injector driver in the computer could have failed. Its possible one of the injectors shorted out and cooked the driver.
You are sure you are getting power to the injectors, but no ground signal ?

Sep 25, 2012 | 1993 Chevrolet K1500

1 Answer

Getting gas to carb but no gas to injectors


check your crank sensor and ignition module. you need a crank signal for your injector, to pulse, use a noid light to check at your injector for the signal or use a scanner. also a bad fuel pressure regulator, can result in low fuel pressure. Maybe the fuse for the injectors are blown? hope this helps!!! check to see if you are getting 12 volts to injectors.

May 30, 2011 | Chevrolet V20 Cars & Trucks

1 Answer

B1202 Fuel sender circuit open


P1202 cylinder No. 2 Injector Circuit Open/Shorted

The fuel injector on cylinder two is at fault. It could simply have come unplugged, it could have an internal short, or it could have an internal failure that doesn't allow a signal through (open circuit). I'm guessing it has a miss since it would not be running on that cylinder. If you are familiar with a 'noid' light, you can use one to verify if the injector is getting a signal. This way, you know if there is an issue with the computer side of it or if the injector is at fault. A 'noid' light is basically a LED that you plug into the injector harness (after unplugging it from the fuel injector) and then run the engine to see if the light flashes. It should flash rapidly as it would come on each time the computer tells the fuel injector to fire. If it does light up as it should, replace the fuel injector. If it doesn't light up, you'll have to trace that wire back to the computer and use a continuity tester to see if a signal can get through the wire to the computer. If a signal doesn't get through, replace the wire. If a signal does get through the wire, replace the computer.

Mar 03, 2011 | 1999 Lincoln Navigator

1 Answer

Fuel injectors


There is a module to control the injector valve o and off. If it doesn't give a signal to turn on the injectors then injector is not working. The electrical connector from your injector is where the signal from the module going in.

Sep 10, 2009 | 2000 Oldsmobile Alero

1 Answer

No signal to injectors, need to know what gives the signal


if voltage is on both sides of the injector your computer is bad if only on one side try a crankshaft position sensor its very common with these cars.

Jan 08, 2009 | 1995 Buick LeSabre

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