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How do I fix a check engine light intermittent misfire?

2003 chevy impala check engine light on hooked up to computer code intermittent misfire.cannot feel misfire running good.

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Check fuel pressures, clean and test injectors, replace HT leads with quality units

Posted on Apr 20, 2015

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2004 chevy impala, jerking when trying to accelerate. Check engine light flashing


Cylinders are probably misfiring. Plugs probably need changed. Also have a local parts store check for any check engine light codes. May have multiple cylinders misfiring. Could possibly be plug wires (If it has them) or the Coils on the plugs (if it is set up like this instead of plug wires).

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Intermittent misfire


misfiring can be many things, least of which would be a intake gasket. sparkplugs, sparkplug wires, coil, fuel injectors etc. if the check engine light is on then take it to an auto parts store and they can read the code and tell you exactly what it is

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If the security light has come on, that is indicating a problem in the antitheft system. Tho it may be intermittent right now, it can only get worse. Read thru this link, it will help you understand the problem, offer some tips and tricks, and show you some ways to bypass and fix it.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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I have a 2005 Chevy Impala and the check engine light just came on what should I do?


Take it to a place like Auto Zone and they will hook up their computer to it and tell you what the fault code is for free. Most common is a misfire which would indicate new plugs or wires.

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I have a 2003 chevy impala i changed the egr valve and my check engine light is still coming on and a part store read my code and it said egr valve what else could be the problem


The code in the ECU might not have reset after you changed the EGR. Try unhooking the battery and let the car sit for a couple minutes and then hook it back up and see if the light goes away.

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I have a 2003 Chevy Impala that is giving me problems. It's sputtering when idling and slowing down, has stalled a couple times at a traffic light. Sometimes has a knocking sound, when in reverse the...


I suggest changing your egr valve. I have a 03 impala with the same problem and check engine light came on and through the code for the egr valve. they are 154 at autozone

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Intermittent instrument panel lights on a 2004 chevy impala rt. rear marker lamp was out and replaced instrument panel lights still do not work at night intermittently.


I have a 2004 Chevy impala the check engine light came on and the car is revving high and putters what would cause this?

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Wow, I just went through the same problem and guess what it was a clogged converter and a bad oxyegen sensor. The garaged fixed it up for me by putting an eco converter on it and a new O2 sensor. I have a 2003 Chevy Impala,V6 3.8 engine. Good Luck!!!!

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