Question about 2002 Pontiac Grand Am

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My 2002 2.2 L grand am wouldnt start the mechanic said it need a new catalitic converter so I had it changed I was driving back to the shop and it died again. It has a new coilpack,module, sparkplugs,crank sensor,when I start it the rpms jump up and down, if I rev it to 2000 rpms it runs fine, if I rev it to3000 or 4000 rpms it kills . what could be wrong

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I don't see mention of a fuel filter or fuel pump. It sounds more like a fuel pump as they can often run sporadically until they finally quit.

Posted on May 31, 2010

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