Question about 1991 Volvo 240

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When starting cold runs good after about 3 or 4 mimiutes have to pump the exceliator to maintain idle not seeming to get enough gas replaced fuel filter , spark plugs

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Without being there...its difficult to diagnose...but....( just a shot in the dark) When you first crank it up, there is a cold start injector that sort of adds an extra shot of gas to help get it warmed up...then, it cycles off, perhaps answering the run ok when cold. Now....perhaps when engine begins to warm....this causes metal to "expand" allowing for a vacuum leak somewhere. Listen for an unusually loud hiss, or air being sucked in somewhere. All internal combustion engines produce vacuum when running, as the pistons...on the down stroke create this naturally. So....when a vacuum hose, connector, intake gasket (where intake mates to engine or any device mounted to the intake) comes loose, breaks, wears out....you have a vacuum leak that can cause engine to run poorly, or not at all. Also check for a egr valve stuck open.

Theroadisalover

Try to post back and let me know If I helped you solve your problem. It will help me with my rating....! Thanks

Posted on Jan 02, 2011

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