Question about 2004 Chevrolet Impala

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I did a full tune up on my 2004 Chevy Impala and its still misfires, what shall I do now?

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1201 Answers

SOURCE: 2002 Chevy Impala Sensor # 3

You didn't give the engine size, so I'll give what my manual shows.
The 3.4L engine----- 2nd one in from the left, in back of the engine.
The 3.8L engine------2nd one in from the left, in front of the engine.

Posted on Mar 12, 2009

  • 295 Answers

SOURCE: Headlight wiring diagram for 2004 Chevy Impala

I would go to Alldata.com on line for your vehckle to get the wiring diagrams.

Posted on Jul 18, 2009

  • 10 Answers

SOURCE: on a 2002 chevy impala with a 3.4 engine. iget code po303.

replace all wires and plugs with ac delco parts only iradium plugs only!!

Posted on Dec 24, 2009

mlapres
  • 757 Answers

SOURCE: What does a major tune

New spark plugs, oil and oil filter, transmission flush and fill, fuel filter, air filter, coolant flush and fill, clean throttle body plate and bore, clean the MAF sensor, replace any loose or cracked vacuum lines, PCV valve, new air filter, new battery.

99% of the time all you should ever need for a tune up is new spark plugs, and a clean air filter and throttle body. But since your inquiry indicated "major" I gave it more critical thought.

Posted on Feb 18, 2011

Zeevert
  • 373 Answers

SOURCE: My 2004 impala has full powere but won't start no

When it doesn't start, is the security light and maybe the battery light flashing?

If yes, it's probably the PassLock security system. I just bypassed mine on my 2002 Impala. There are several websites with information and possible solutions; including spending several hundred dollars at the dealer, to a do-it-yourself bypass for a couple dollars.

The best source of information I could find was:
http://www.bergerweb.net/grandamsecurityfix.htm
There is lots of good information there.

If you want to see my writeup on bypassing the PassLock on my Impala, you may have to register at http://www.naioa.com and go to:
http://www.naioa.com/v2/modules.php?name=Forums&file=viewtopic&t=44480

Posted on Jun 30, 2011

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1 Answer

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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Could be misfire (tune it up)
car overheat ;;; look for antifreeze level and change thermostat
hope it helps

Apr 03, 2014 | 2004 Chevrolet Impala

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When should 2004 chevy impala have tune up


if you are the original owner then you should have had about 2-3 done if you recently got the car it is wise to do one tune up are good for about 1 1/2 yrs or depending on you

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My 2004 chevy impala fuel gauge go to full when its gets low in gas, can u tell me what makes it do that?


Most likely you have a faulty sending unit in the fuel tank. The sender is a rheostat and can lose its electrical contact in parts of its travel distance from full to empty.

Jul 02, 2011 | 2004 Chevrolet Impala

1 Answer

P0300 random misfire chevy 2002 impala


depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). have worked at G.M. dealership for over 15 years, saw that alot.

Feb 12, 2011 | 2002 Chevrolet Impala

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