Question about 1993 Chevrolet Lumina

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1993 Chrevolet Lumina: Car starts fine from a cold start. Once I start to drive there's hestiation in the engine. The car doesn't stall, it just feels very rough; almost like something is clogged or blocked. The problem usually clears up later in the day once the engine is warm. Its been cold out so I don't know if its related to that or something else?

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First thing to do is chg. fuel filter, Now if that has been done and there is no improvement, than do a fuel pressure test, to chk. if fuel pump is putting out the right p.s.i. a few pounds under could indicate pump is getting weak or getting ready to go out, auto parts store can tell you the correct p.s.i. if all that chks. out ok, then you can elimanate it being fuel problem. And its cheep. It could be electrical but it sounds more like a fuel delivery problem to me.

Posted on Feb 25, 2009

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