Question about 1989 Chevrolet K1500
I have fuel to the throttle body and 12 volt power to the injectors but no pulse using noids. The module in the distributor was that last part I threw at it. Anyone I NEED HELP!
The injector ground circuit must not be working. What causes the pulse is when the computer internally grounds the injector circuit, power is passed across the injector solenoid terminals. All the injector grounds are spliced together on each bank of engine, and run into the computer. So, injector power, but no pulsing would seem a computer malfunction as long as the ground wires are good. Did you check all the injectors for pulse with the noid light, or at least both sides of engine?
Posted on Jan 23, 2013
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Posted on Jan 02, 2017
injector pulse is just controlled by the ecm or computer as some would say,u said u replaced wires? did u have a fire or melt wires? ecm is known to go bad on these,had a few of these trucks back in the day.
Posted on Feb 16, 2009
SOURCE: have a 94 gmc rally
YOUR INJECTOR DRIVERS ARE IN THE ECM(COMPUTER). IVE HAD THIS PROBLEM BEFORE AND IT WAS JUST THAT. GOOD THAT U HAVE POWER BUT THE ECM SENDS YOUR PULSE WIDTH GROUND TO THE INJECTORS. IF U WANT TO SAVE SOME MONEY U CAN GET A KNOWN GOOD ECM FROM SCRAP YARD FOR AROUND 30 BUCKS AND TRY. IF NOT POSSIBLY BROKEN WIRE FROM ECM BUT IF U HAVE BEEN DOING MAJORITY OF MAINTENANCE THEN ECM MAY BE CULPRIT
Posted on Aug 01, 2010
Testimonial: "thank you. "
check the fuel pressure it should be 45 to 55 psi if thats good check the voltage to the injectors should be about 3volts
Posted on Mar 19, 2011
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