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01 Cavalier won't start

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  • 01 Cavalier won't start

    Help! Our car died abruptly yesterday while running on CNG at about 15 mph (almost home). We took out the CNG fuse and it still won't start on gasoline. It tries to turn over, but won't. The check engine light has been on and off in recent months. Since it won't start on CNG or gasoline, does that mean the problem is unrelated to the CNG system? Should we just take this to our trusted local mechanic (not experienced with CNG) or find a CNG specialist? We're not equipped to do our own repairs. Thanks.

  • #2
    Re: 01 Cavalier won't start

    You say "It tries to turn over, but won't". When it is trying to turn over, do the lights dim more then normally? If so, you might just have a battery or battery connection problem. If it quit while running, its possible the battery was running down. Unless the computer has been re-flashed, many Cavaliers have a programming fault that doesn't turn on the alternator warning light. You might want the charging system and vehicle grounds checked out. Assuming you don't have a bad mechanical problem (like a siezed engine), a local "trusted" mechanic could check it out and get it running on gasoline and the CNG should take care of itself. You should take the car to a parts store when the check engine light is on and have them tell you the number of the DTC. The codes will be erased if you remove the battery so until they happen again, you cannot retrieve them. Also, if the check engine light is comming on and then after a few starts it goes out, you are seeing an intermittent problem. Report the codes back to this site and we can see what is causing them.
    Last edited by siai47; 02-13-2010, 01:47 PM. Reason: stupid spelling

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    • #3
      Re: 01 Cavalier won't start

      I'll have to try to start the car in the dark to determine whether the lights are more dim than normal. (It's hard to tell on a bright day.). I'd never heard of a battery just running down and the car dying as a result. Also, will take it to a parts store when the check-engine light is on sometime so we can get to the bottom of that. Thanks!

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      • #4
        Re: 01 Cavalier won't start

        You can look at a interior light or put a voltmeter on it to see what is happening when you try to crank the engine. Car batteries die and cars quit if something goes wrong in the charging circuit---and as I said in the earlier post, many Cavaliers have alternator warning lights that don't work correctly. I hope its an easy fix.

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        • #5
          Re: 01 Cavalier won't start

          sai47: My mechanic found a loose wire in the car's computer by the headlight (sorry if my description isn't precisely accurate). When he soldered it, the car started right up. Now I'm kicking myself for not copy/pasting your instructions from one of these threads about how to protect that computer from future erosion. Somehow the cover was knocked off of ours, and we're awaiting a new cover. I'd love to tell my mechanic how to protect the computer with sealant or whatever it was you suggested. Thanks for your suggestions and.... you are right on the money about the unfortunate location of that computer!

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