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Fast Acting, Long Lasting
Join Date: Aug 2007
Location: Eastern Chatham co. NC.
Posts: 1,171
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If it really is a TBI engine, check the grounds at the thermostat housing. One is ECM ground, and the other is sensor ground. They were notorious for corrosion, thus causing some driveability issues.
Check, also the oil pressure switch because after the first KOEO fuel pump prime, the oil pressure switch is responsible for powering the control side of the fuel pump relay. If there's no closing of that circuit in the switch, the fuel pump relay won't close and power the pump.
If it's a Vortec engine (big drum air filter on the passenger's side, most likely what you have in '97) check the fuel pressure at the fuel rail. That induction system needs AT LEAST 55-65 PSI to start the engine, and 45-55 to run the engine.
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Eighteen ways to burn fuel.
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