Rpm surge while using Cruise control

Rpm surge while using Cruise control

This is a discussion on Rpm surge while using Cruise control within the F150 Ecoboost Problems forums, part of the F150 Ecoboost Forum category; Just wondering if anyone else has had this problem? While using cruise control at lower rpms it revs up about 200-300 rpm randomly. I think ...

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  1. #1
    Ecoboost Jr Member Thegreatest49's Avatar

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    Rpm surge while using Cruise control

    Just wondering if anyone else has had this problem? While using cruise control at lower rpms it revs up about 200-300 rpm randomly. I think I might have a bad waste-gate, could that cause it to "over boost" causing the problem I'm having while using cruise control?


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  2. #2
    Gold Supporting Member bespurcell's Avatar
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    That's probably the torque converter unlocking. Nothing to worry about. Does this happen on slight inclines or going up hill usually?
    2012 supercrew Lariat 4wd 3:55 ELD SCT X4 Gearhead tune, 3" Magnaflow, deleted resonator and replaced with 3" pipe, Mishimoto CAC and cold side pipes

  3. #3
    Ecoboost Jr Member Thegreatest49's Avatar

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    Quote Originally Posted by bespurcell View Post
    That's probably the torque converter unlocking. Nothing to worry about. Does this happen on slight inclines or going up hill usually?
    Actually it only does it when there is no incline, and it stops when the engine is under load or high boost which led me to think it was over boosting


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    Ecoboost Master GearHead_1's Avatar

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    Convertor or perhaps the A/C compressor.
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  6. #5
    Ecoboost Jr Member Thegreatest49's Avatar

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    Quote Originally Posted by GearHead_1 View Post
    Convertor or perhaps the A/C compressor.
    I'm pretty sure I have a bad cvt solenoid am changing them this weekend. Could be the problem if that doesn't fix it then going with torque converter


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    Rookie Kimosan's Avatar

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    Really late reply but... did you ever solve this problem? I have a 2012 Platinum with 105k miles and am experiencing the same "surge" in rpm when using cruise control. I'm also experiencing an occasional "shutter" at various rpms (mostly below 2k) and it's really noticeable when towing and going up hills. At times it's enough to shake the entire truck to the point it feels like I'm driving on a washboard road or over those "wake up" grooves on the edge of the road. The truck has never thrown a code when this happens either. I'm up-to-date on service bulletins, replaced spark plugs and ignition coils, new throttle body, drilled weep hole, and cleaned MAP sensors within the last 10K miles. These nuisance issues are really annoying.
    2012 F-150 Platinum 3.5L Ecoboost

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