Question about 2004 Chevrolet Impala

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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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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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