Question about 1991 GMC Sierra
Changed controll module fuel pressure good fuses all good ground good tps good iac good runs when fuel dumped down tbi but dies when fuel runs out no inj spray unless ground blue and green wires 12v. power to white and red wires on inj. please help
Posted by Anonymous on
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Posted on Jan 02, 2017
THE INJECTORS ARE PULSED TO GROUND DIRECTLY BY THE ECM...... MAIN COMPUTER... IT COULD BE FLAKY BUT I HAVE FOUND MANY TIMES THAT THE HALL EFFECT SENSOR LOCATED IN THE TOP OF THE DISTRIBITOR GETS INTERMITTANT.... THIS CAUSES LOSS OF SIGNAL TO ECM INTURN LOSS OF SIGNAL OUT OF ECM TO INJECTORS... LET ME KNOW
Posted on Sep 01, 2009
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