Question about 2004 Chevrolet Cavalier

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Check engine light came on after changing fuel pump

Mechanic changed the fuel pump on my daughter's 2004 Cavalier..driving home the light went on and car seems to be jerking slightly when moving after a light or stop. Havent had it checked yet...wondering if it could be the gas cap? The light came on after putting gas in the car.

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  • 14 Answers

If it came on right after leaving the shop, take it back there. The engince light indicates that an engine error code has registered in the computer. It may be a 'hiccup' due to the service. There may have been air still in the lines or filter, for example.They can check it and the light can be turned off. They'll want to see what the code is, and that'll help determine what's going on.

If they say that major service is needed, beware and have it checked out by another shop. Not many mechanics are dishonest, and taking it back to them allows the honest ones to check up on their work. If they give you a high estimate for additional work, then taking it to someone else allows them to check up on the first guy's work.

Hope this helps.

Good luck! :)

Posted on Apr 19, 2013

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Posted on Jan 02, 2017

angelo63
  • 129 Answers

SOURCE: Check Engine Light On - 2003 Chevy Blazer

hi the engine check is letting u know that a component on your engine has failed the computer stores this information is stored in the computer memory u need to go to a garage and say u want the fault codes checked they have a scanner to do this it could be a faulty part or just a bad connection hope it helps your mechanic should know this he must be a bush mechanic good luc mate

Posted on Dec 20, 2008

  • 1 Answer

SOURCE: no power, jerking bad 1998 cavalier

change your TPS (throttle postion switch)

Posted on Jan 10, 2009

  • 65 Answers

SOURCE: 93 chev s10 blazer, no fire to fuel pump, changed the two relays.

there wouldn't be any power at the fuel pump unless car was running or if the engine is being cranked over.When you first turn the key on there is about 5second of power at the pump then it turns off.Is the check engine light on?if so have you put a code reader on it to see what code it is.I had the same problem with a cavilier.For the longest time i thought it was the fuel pump but it turned up to be the ignition module.I was told that if the igniton module wasn't working then the fuel pump would't get power

Posted on Jan 15, 2009

  • 1201 Answers

SOURCE: Burning smell,check engine light-misfire, rough idle 96 cavalier

Sounds like there is a blown piston, to be sure have a compression test done on that #2 cylinder, if the reading is low, then you'll know.
A friend of mine had a 95 that did simular things only a little more,
it started smoking, dash lights flickered, etc. Finally, he had to get rid of it, the piston rod went through the engine block.

Posted on Feb 02, 2010

roniecon
  • 6826 Answers

SOURCE: 2005 chevy cobalt 2.2 is running rough (putting)

Number three cylinder is miss fire,it does not mean it is the coil,although it could be,remove the coil,and boot,and spark plug,inspect them to see if the plug,or boot look bad,replace the spark plug,and if the boot is burned or distorted,replace it,a fuel injector can cause a miss fire also,but change the spark plug and see if this solves the problem,if not replace the coil,if it is a dead miss,then the coil might be bad,as for the water in the fuel ,the cap is missing,,and 5 dollars worth of HEET will not hurt,also,fuel from the fuel station,can have water in it.It happens a lot.

Posted on Apr 03, 2010

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*Ensure Fuel system performs properly (fuel pump, Fuel filter, Fuel injectors, fuel pressure regulator).
*Check engine compression, valve clearance, valve timing and timing belt (if equipped)
Check airflow meter or MAP sensor and wiring
*Check idle air control valve (if equipped) and wiring.
*Check circuit opening relay and EFI main relay.
*Check STA signal at Engine Control Modual (ECM)
*Check Engine Control Modual (ECM) and wiring.

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