Question about 2003 Chevrolet Cavalier

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2003 cavalier won't start

I have a 2003 cavalier , just bought it last week. 2.2 eco motor. Was running rough and check engine light was on. Had code checked said it was misfire in #1 cylinder. Changed plugs, coil pack & all 4 boots. Took it for a test ride, still running like its misfiring. Came home, noticed plug on computer box (by firewall) was loose so i pulled off , blew some dust off of it and put it back on. Went to try it again, wouldn't start, just cranks over and over. Thought it might be the passlock/anti theft system shutting it down because I disconnected that computer. i was told by a guy at the chevy garage to turn the key on and leave it for 15 minutes, and to repeat that 3-4 times, if it didn't work the first time.Tried that, even though the security/anti theft light is not on or blinking. Didn't help at all. still keep thinking it had something to do with me unplugging that computer. Is that possible? or a friend whos a mechanic said they had a lot of problems with the ignition module on top of the coilpack. Just seems weird that it started after I replaced the coil packs, i drove it 3-4 mile, stopped for gas, started it again, drove it home. and it was ok. the only thing i did between it starting and not starting was that plug? any suggestions would be greatly appreciated. Thanks Rex

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  • 5 more comments 
  • dlruth117 Dec 02, 2012

    Ok, so add ignition control module to the list of replaced parts, still won't start.

  • teds repairs
    teds repairs Dec 02, 2012

    sound like the computer had active the alarm to a no start

  • dlruth117 Dec 02, 2012

    but theres no lights blinking or on when the key is on. If it was the alarm system wouldn't it be showing one of those? If you're right Ted, how can you get it to reset the alarm?.Thanks for the help Rex

  • teds repairs
    teds repairs Dec 02, 2012

    I need to think this out,but I am going do my best to fix this . I am going to treat as a car in my shop, my link to my garage Iam on facebookhttps://www.facebook.com/TedsRepairs .

  • dlruth117 Dec 02, 2012

    thanks, i'm stumped.

  • teds repairs
    teds repairs Dec 02, 2012

    it is ok.as I said I am going treat it as car in my garage

  • Dan Jacobs
    Dan Jacobs Apr 03, 2014

    I dont think it is a anti-theft issue. remove coil pack assembly and install a spark tester do you have spark yes /no most anti-thefts cut fuel or starter in the fuel case it will run of 10 seconds then will not restart. to get spark the crankshaft sensor has to sent signals to the pcm. then to the control module. Cleaning the computer plug is not a problem but it was loose remove check for damaged pins or cracked board.

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  • Chevrolet Master
  • 2,101 Answers

There is a lot of problems with the eco motor and thier ignition control module. get a use one to try it out

Posted on Dec 01, 2012

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4

ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Posted on Jan 17, 2009

iambanshee74
  • 3489 Answers

SOURCE: 2007 aveo misfire faults

gm has a problem with this from way back. double check your spark plugs and if they are not ac delcos, change them. ive seen this time and time again swearing, myself, that there is no way that the plugs would cause this issue. it always comes up with random misfire and usually another 1 or 2 codes misfire codes. put in ac delco, no more codes. let me know

Posted on Feb 22, 2010

  • 819 Answers

SOURCE: I have a 2002 TrailBlazer with the straight

did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Posted on Feb 28, 2010

  • 1509 Answers

SOURCE: I have a 2004 Chevy Cavalier. A couple of months

Well it's temping to put in biggfer fuses as the problem gets worse but the size of the fuses are to keep you from burning things up so you've from your probem with a 30 amp smoke test. The raditor fan wire is melted somewhere in the wire harnes to the wire for the trck lock or even key on circirts. the likly place to look is inside the stering collum. It takes the skills of removing the steering whel and the lcok plate and even then thats does'nt have to be where the problem is. You need to look under the dash after you remove the covers and use you nose to smeel for the burnt wiring and open up any thing the smells like it's been hot and anything the appers melted together. once a harness is found melted you need to seragete all the wires in the loom but don't cut the wires justy seaparte them. once you think you've got then all pulled apart so no bear wires touch each other or any meal parts put in the correct size fuses and see if you can connect the battery with out a spark. if you can you may then start checking to see what works and what does'nt.. This all sounds like too much work or too hard to do then you'll need to pay someone theat knows alot about car wiring problems to do it for you. I'll been doing this kind of work for the last 20 years and a'm alawys finding new things that are fried and burnt up. We all charge by the hour to do this work so the most experieced mechanic that works on cars like yours will probly find and fix the problem the fastest. therefore they may charge more per hour but their likly to get it right quicker and it'll stay fixed after they fix it.. This is the most likly kind of work to go sour after it's fixed cause they might miss a circuit that you use and they did'nt try. and as soon as it burns again it's back to the drawing board and if big fuses are use the fire can take the whole car.

Posted on Apr 26, 2011

  • 172 Answers

SOURCE: I have a 2004 Chevy

Many cars have the cooling fan on a thermostat or time delay, to allow it to run for a short period of time after the engine turns off, to cool the engine off. You may have just never noticed it before. So I wouldn't worry about that.
Your real problem is the blowing fuses, apparently you have a short somewhere in your wiring. Putting in bigger and bigger fuses is a great way to set fire to your wiring harness. It's possible that the wire is pinched or chafed somewhere, and perhaps when you hit a bump just right, it touches and shorts.
You may have to take this to the Chevy dealer or a GOOD independent shop to have them chase it down. Unless someone out there knows exactly what this is, it could be a tough one to find.

Posted on Apr 26, 2011

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