Question about 2002 Chevrolet Impala

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Check engine light on auto zone read codeP0404 replaced egr valve,air filter, added sea foam, and high octane booster. car still has check engine light on reading same code will not accelerate hesitates if i can get it past 40mph. when i step on the gas the car does not want to go and it revs high

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When it revs high, is it down shifting? if so you may be running out of gas. low fuel pressure or lack of fuel getting to the injectors. (fuel filter)

Posted on May 03, 2010

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Posted on Jan 02, 2017

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What is Sea Foam,and why would you add it?
Nothing I see but the spark plugs,addresses your issues.
Have you looked at the TPS Sensor,with a scanner?
Have you looked at the Ignition with a Scope
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Is the Egr Valve working correctly?
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Are the O2 Sensors,15 years old?
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