1988 Chevy Truck electrical computer and / or ?????

1988 CHEVROLET TRUCK

155,000 MILES • V8 • 2WD • AUTOMATIC

REDIRON96

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donated 10 $$ by credit crd.before entering this page no start condition.. runs on wd 40 or gas placed in tbi momentarily, changed tbi fuel pressure relay and fuel pump. raised fuel pressure placed nail in return fir resricted orifice, by passed fuel pump. works no start, injectors will not fire , injectors will dump when grounded. installed new battery, truck has been laid up 4 years for faulty
fuel pump(changed) with ignition fuel pump will not operate, checked fuses ok,, need to check voltage imput at computer?? everything else works on truck.
just a no staqrt condition
opinions and advice req2uested thanks
william stroud

Oct 1, 2009 at 9:05 AM

JDL

CAR REPAIR CONTRIBUTOR
16,098 POSTS

Welcome to the forum, thanks for the donation. The above wiring info shows the fuel pump-- pump relay-- there is also an oil pressure switch in the fuel pump circuit. The injectors won't pulse without rpm signal. the fuel pump should run, even without rpm signal, as long as the o/p switch circuit is functional and there is oil pressure. Any questions just holler.

Oct 1, 2009 at 10:52 AM

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