Burning smell coming from the car engine.

Discussion in 'Mustang EcoBoost Discussions' started by inkman58, Jun 16, 2017.

  1. Jun 16, 2017 #1
    inkman58

    inkman58 Ecoboost Member

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    hi I'm pretty new here and I just bought a EBM 2016 premium convertable. It's in excellent shape with 36,000 miles former rental car ( hertz) it's a CPO grade vehicle. Lately when I step on it for a short while either in drive or sport mode I'm noticing a slight burning smell when I have my windows down. After I let up on the gas for awhile it just goes away. I'm wondering if it's just because the car set at the dealership for a few weeks and was not driven much. Now I'm doing a daily drive and stepping on it or is there a problem here? Thanks inkman58
     
  2. Jun 16, 2017 #2
    Squid

    Squid Moderator Staff Member

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    First troubleshooting questions -- Did this just start? Does it occur at the same approximate time/place? Does it do it when the car is colder or hotter, traffic or highway speeds?

    A couple of things to watch for/do:
    Clean the motor well (taking care to keep water out of the intake and don't directly spray the electronics with high pressure) -- degrease as well. A clean engine is much easier to troubleshoot.
    Look for anything foreign that may be on the engine. Bits of plant-matter (leaves), rags, plastic bag picked up off the highway, etc.
    Note exactly the levels of fluids. Do this in a cold engine, so you can make a good comparison.

    Watch the motor and see if there are any leaks, especially around the exhaust/turbo.
    Watch your fluid levels and check for changes (this is why I recommend a cold engine).

    If you have leaks or fluid changes, then it's time to take it into the dealer for a check. Cleaning the engine may remove whatever is causing the smell.
     
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  3. Jun 16, 2017 #3
    inkman58

    inkman58 Ecoboost Member

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    Yes it just started. Mostly highway speeds after I push it a little but not even to 90mph for a few minutes. Happens different locations and only notice it when windows are down. I'll start checking the fluids cold and so far no signs of high running temps on oil, water or engine. I really I'm not pushing it hard: still break in period for me and the car:)
     
  4. Jun 17, 2017 at 8:20 PM #4
    inkman58

    inkman58 Ecoboost Member

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    Smells more like rotten eggs and it seems to be coming from the exhaust not the engine . Happens every time the turbo kicks in but not a normal cruising speed highway or streets. Any more options please ? It really stinks guys and I just got the car. Not too happy right now dealing with this odor and my top is up. Heard lots of people getting no where with dealerships over this same problem and makes me nervous ..
     
  5. Jun 17, 2017 at 8:48 PM #5
    Horcy1

    Horcy1 Ecoboost Member

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    Bad cats give off rotten egg odours.

    Most people get nowhere as they give up. Just keep taking it back.

    I took MG Rover to court over a new car issue and won. Shouldn't have had to go that far but that lead to a result that was fair and just
     
    Last edited: Jun 17, 2017 at 9:04 PM
  6. Jun 17, 2017 at 8:52 PM #6
    inkman58

    inkman58 Ecoboost Member

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    Geeze I just bought the car a month ago only has 37k on it. Sure that's what it is ? Anything else that could cause that??
     
  7. Jun 17, 2017 at 8:57 PM #7
    Horcy1

    Horcy1 Ecoboost Member

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    Cats can fail at any time. As can just about any part
     
  8. Jun 17, 2017 at 8:59 PM #8
    Horcy1

    Horcy1 Ecoboost Member

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    Could be a broken fule pressure regulator
     
  9. Jun 17, 2017 at 8:59 PM #9
    inkman58

    inkman58 Ecoboost Member

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    Good point
     
  10. Jun 17, 2017 at 9:03 PM #10
    Horcy1

    Horcy1 Ecoboost Member

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    Just thinking try a new fuel filter first. Would eliminate the pressure regulator. Cheapest options aswell
     
  11. Jun 17, 2017 at 9:12 PM #11
    inkman58

    inkman58 Ecoboost Member

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    Ok will try that. That you .
     
  12. Jun 18, 2017 at 7:45 PM #12
    richter111

    richter111 Ecoboost Member

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    Sounds like a bad cat to me. I've smelled it on other cars before, bad cat every time. Fully covered by warranty. (especially in California). Google it to set your mind at ease, then call and set up a appointment at the dealership.
     

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