Engine running VERY LEAN

Asked by Robert Apr 20, 2024 at 07:46 PM about the 2002 Cadillac Seville SLS FWD

Question type: Maintenance & Repair

Idle is smooth and can accelerate the engine in park or neutral, but no power
after in gear, just caughes and spits.

3 Answers

157,615

If the head gaskets have not been done yet I'd check that first. Are you getting a lean trouble code? Pull the spark plugs and look at the tips. The ones that are white are burning lean. If it's all of them it's most likely a fuel delivery problem. A vacuum leak will also usually manifest itself as a high engine idle. Jim

2,315

Check fuel pressure at fuel rail. watch for pressure drop when you try to drive. If it drops out it can be the fuel pump or filter.

159,075

Is the catalytic convertor plugged up? Is the check engine light on?

Your Answer:

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