•  
    Results 1 to 1 of 1

    Thread: Misfire codes, rotten egg smell, poor mpg, limp mode/hesitation/no acceleration.

    1. #1
      What's wrong with my car?
      Join Date
      Apr 2019
      Location
      Norman, Oklahoma
      Posts
      7
      Garage empty: add car
      Thanks
      0
      Thanked 1 Time in 1 Post

      Misfire codes, rotten egg smell, poor mpg, limp mode/hesitation/no acceleration.

      Just thought I’d post this to give someone else having this problem something to check before they go pay tons of money fixing something that cost me nearly nothing. I bought an ‘10 Aveo LT for my wife in November with a little over 100K miles on it. She does a paper route for a job and almost immediately started complaining the gas mileage was bad. I calculated it at about 18 but didn’t think much of it, considering she never gets above 25 mph working, it was super cold out, and she loves to put the crappy cheap ethanol 7/11 gas in it. Then she says it stinks like rotten eggs, which I’ve read was common with Aveos, and she was right it was overpowering at idle once the car was warmed to temp. CEL started coming on in February for misfires in cylinder 4, sometimes cylinder 2 and then finally all cylinders. It would come and go. Pulled the coil pack and pulled the plugs, they were platinum plugs and in rough shape so replaced them with regular copper plugs. Here is where I messed up - didn’t do my research on the gap.. the plugs in the car were gapped at .44 or so and I just assumed that was correct and installed the new plugs with the same gap. A week goes by and her gas mileage was still bad, eggs smell got worse and the car actually went into limp mode. She takes the car to a shop and they tell her the catalytic converter is bad and want $1500 to do it. I said no way bring it home. Did some more research and found the gap should actually be .31. Pulled it apart and brought the gaps down... runs PERFECT! No more smell, mpgs average 24 for all city driving, no more hesitation and CEL went off and stayed off. 4 copper plugs for $12 and the right gap was all it took. Just thought I’d put this out there for those with similar issues before you start worrying about the cat or tearing apart the throttle body or injectors and get charged out the ass by a shop and still not get it fixed right.


      Sent from my iPhone using Tapatalk






    2. The Following User Says Thank You to Thomascat81 For This Useful Post:

      Helios (04-16-2019)

    Similar Threads

    1. Limp Mode? With no codes?!!
      By pbody in forum Troubleshooting and Maintenance
      Replies: 16
      Last Post: 08-31-2016, 07:04 PM
    2. 2006 Aveo goes into limp mode with code P39C0 code thrown
      By ricola in forum Troubleshooting and Maintenance
      Replies: 3
      Last Post: 03-10-2015, 02:03 PM
    3. rotten egg :: 2010 Chevrolet Aveo5 (Garage entry)
      By MetroMPG in forum Members' Aveos / Garages
      Replies: 0
      Last Post: 12-18-2014, 03:23 PM
    4. Limp home mode
      By raz1 in forum Troubleshooting and Maintenance
      Replies: 4
      Last Post: 01-20-2014, 04:04 PM
    5. Sulfur, 'rotten egg', smell from under car after driving. 2010 Aveo5 manual trans
      By spaghettijesus in forum Troubleshooting and Maintenance
      Replies: 2
      Last Post: 11-02-2012, 01:59 AM

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •