i have tried testing the egr valve, cleaning spark plugs and replacing a couple hard plastic vent hoses

1991 VOLKSWAGEN PASSAT
150,248 MILES
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CANDIEDEANNE
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1991 vw passat. when i first start driving my car it runs great and after an hour it starts fluctuating the rpms when my foot is to the floor on the throttle, what could cause this?
Jan 5, 2012 at 7:22 PM
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RASMATAZ
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-Do you have a check engine light?

Refer to this link for additional information: http://www.2carpros.com/articles/engine-misfires-or-runs-rough
Jan 5, 2012 at 10:05 PM
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