Question about 1989 Chevrolet K1500

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My injectors arent pulsing on my 1989 k1500 suburban. I have 12 volt power to the injectors and have replaced the module in the distributior. Any one have an anwser for me

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!

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  • Chevrolet Master
  • 5,252 Answers

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

  • montehammons Jan 23, 2013

    oops! throttle body injection, right? It's still the ground circuit, run a check for continuity of the ground wire.

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SOURCE: 89 s10 2.5 has fuel and fire injector has power but no pulse

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

  • 78 Answers

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

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SOURCE: My camaro isn't getting gas thru the injectors....

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

perkins48
  • 14251 Answers

SOURCE: what pulses injectors on 4.3 chevrolet 1500 throttle body injector

Check the throttle position sensor.Here's what it looks like.

Posted on Dec 30, 2012

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1 Answer

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