My 2004 chevy impala has an intermittent problem. After sitting at idle for a while it begins to idle very rough and occasionally dies. It seems to clear up after reving the engine a couple of times. When this occurs it also seems to cause an acceleration hesitation and cuts out at highway speed. Any ideas?

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Question about 2004 Chevrolet Impala

My 2004 chevy impala has an intermittent problem. After sitting at idle for a while it begins to idle very rough and occasionally dies. It seems to clear up after reving the engine a couple of times. When this occurs it also seems to cause an acceleration hesitation and cuts out at highway speed. Any ideas?

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Sean Marovich

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Do you have a check engine light on and what are the codes if any? Your symptoms describe 4 things I have seen go bad on this car. A bad cat converter can cause this. A bas fuel pressure regulator can cause this. Pull vacum hose of fuel pressure regulator and inspect for liquid fuel. If there is any than the part needs replaced. A bad mas air flow sensor can also create this problem. A weak fuel pump can also cause this.

Posted on Oct 24, 2010

stjohnduane Mar 21, 2011

Where is the gas supose to leak from if its bad? and what vaccum hose the one on the round part.. 3.8 engine...

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