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Vapor lock, dead pedal...talk to me

Discussion in '2013-14 Shelby GT500' started by blue 07, Aug 6, 2020.

  1. blue 07

    blue 07 Well-Known Member Established Member

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    On way more than one occasion, after a drive in the heat of the day, if I shut the car off at a gas station for example to fuel up, I start the car up, push the pedal, and no throttle response. No revving of the engine, actually if you push the pedal, the rpm's go down. Let it idle for a minute or two in most occasions, hit the pedal, throttle response like nothing ever happened.
    Does not happen all the time but enough that it can be annoying. So what's up? I have the usual 2013 GT500 mods, JLT Big Air intake, VMP 67 MM TB, upper pulley, ported and polished blower, 93 octane tune, etc. Car runs fantastic, no issues ever, no engine lights, normal running temp no matter if on the 90 degree day or a 50 degree day, Inlet temp on the gauge reads 127. Explanation on what's happening and what to do about it if anything at all would be awesome ! TY
     
  2. Catmonkey

    Catmonkey I Void Warranties! Premium Member Established Member

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    It's not vapor lock, but I've seen a lot of 13-14 owners have the issue, even on stock cars. It's obviously something in the original calibration that causes it. I don't know if Ford came out with a calibration change for it or not. If your car is tuned, mention it to your tuner. Perhaps someone has more experience or a successful result for that malady.
     
  3. 1 Alibi 2

    1 Alibi 2 If not today, when ?????? Established Member

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    Never had this issue on my 14, owned since Sept. 2013..
     
  4. Ray Lucca

    Ray Lucca Active Member Established Member

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    Had it on my late production '14. Lucky for me the last time it happened was in front of the SVT Tech at my Dealer. Took it back Data logged it and opened an issue with the Hot Line. Car was Stock. Replaced the Battery and Throttle Body under warranty, updated the software. No issues since, about 5 years ago. Good luck with your issue...
     
  5. raustin0017

    raustin0017 Well-Known Member Established Member

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    Has happened twice in 20,000 miles. Both times I have shut it down and started it right back up and the issue went away as fast as a fat kid running towards the ice cream truck.

    Might get banded...don't know if it legal to make fun of an ice cream truck nowadays?
     
    ShelbyGT5HUN and jessie_sanders like this.
  6. 2011 gtcs

    2011 gtcs GT500 poster Established Member

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    my 13 GT500 had this issue, no one has a fix that I know of. It's not the T/B or the fuel system.
     
  7. me32

    me32 BEASTLY SHELBY GT500 TVS Moderator

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    Happen to know the lastest calibration they installed? I have heard of this situation, thought there was a TSB with a PCM update
     
  8. Ray Lucca

    Ray Lucca Active Member Established Member

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    I know he worked with the Factory Hot line, and did update the PCM, don't know if there was a TSB. I brought it back the following weekend as they had to order the TB. Has worked OK since, no issues. Thx
     
  9. blue 07

    blue 07 Well-Known Member Established Member

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    Notice you have an upgrade to your cooling system, that didn't help I assume ?
     
  10. Beercules

    Beercules Active Member Established Member

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    for come reason, intercooler pump comes to mind
     
  11. darksykal

    darksykal Member Established Member

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    do you have anything plugged into your OBDII port?
    I have a Aeromotive gauge that plugs directly into there for monitoring IAT2 temps, and I have had 1 issue where I got into the car, knocked it with my knee and the plug was half in- the car started but did exactly as you said.

    Just throwing it out there as a possibility
     

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