Question about 2001 Oldsmobile Alero

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Surges and sometimes stalls changed plugs and fuel pressure is 30 psi while running but drops to zero in 15 minutes after turning off engine

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You might try the fuel filter, or even the screen at the fuel pump. Sometimes when these are clogged, they let fuel through after relaxing and letting the sediment settle, but move into place to restrict flow enough after running for the engine to be shut down.
Check to see if your relay opens after warming up. Make sure all you connections are tight. It could also, unfortunately, be the fuel pumo itself.

Posted on May 17, 2010

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Try replacing your fuel pressure regulator. Then see how it runs.

Posted on May 15, 2010

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The warm up valve ( WUR ) can also cause hard starts. It is on the side of the engine with two stainless braided hoses going to it. It can be rebiult by Larry at CIS FLOWTECH.

CIS FLOW TECH LLC19225 County Road 13
Fairhope
AL 36532-3687
Phone: (251) 929-0190
Category: Fuel Systems and Parts, Motor Vehicle


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