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1988 Chev G20 van problems

James O'Byrne
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James O'Byrne New Member

James O'Byrne

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I have a 1988 G20 conversion van with 5.7 litre engine TBI  automatic Rough surging idle and extreme hesitation on acceleration . Been through  2 different mechanics throwing parts at it

new distributor cap wires ,plugs ,MAP sensor,IAC, oxygen sensor, smog hose check valve...I'm DONE. Engine is still running like crap!  

riverbanks Senior Enthusiast

riverbanks

Posted
Posted

Try the flashlight test,looking in throttle body,how's the spray pattern look?cone shaped?and also look for weepage at gasket for fuel pressure regulator

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