No fuel injector pulse

[srt4man]

Car runs if you spary fuel but the injectors are not spraying Any Help would be greatly appreciated .

 

[mattsho1993]

i cant remember what i did to fix it but i had same problem a few years ago.... I think it was a ground on the fuel rail...

 

[Off Road SHO]

Thomas,

The injectors are commanded to fire by the PCM; which uses pulses of "ground".

So, you've verified that you have 12 volts at the injectors by back probing the red wire at each injector with a grounded test light?

You've also verified that you have at least 32 psi of fuel pressure at the Schrader valve on the fuel rail behind the throttle body?

You've checked to make sure that all the original grounds of the wiring harness in the engine compartment are still grounded?

You've checked to make sure the PCM's pin 20, 40 and 60 are still grounded?

Tom

 

[auto.guru]

^ after you do that, check your CCRM... big culprit there.

 

[AREA 91]

Check the ground wire in the valley of the block, near the knock sensor.

 

[yamahaSHO]

Check the ground wire in the valley of the block, near the knock sensor.

The O2 ground?

 

[AREA 91]

The O2 ground?

Woops! Brain Fart!:angelnot:

 

[mrecoolgar]

I had the same problem on one of my 89's.
Replacing the computer fixed it.

 

[auto.guru]

When my ccrm wasnt grounded properly the Injectors wouldnt pulse. Check the ground wire (black/green stripe) near the power steering pump resivour. I believe one ground connects to battery

 

[srt4man]

The car is now running ,I got 6 new injectors and soldered my ecm grounds thanks for all the replys on helping me , its been a project car I have worked on for a while long while lol , got a few minor things to finish up on the car .

:thankyou: