Idle up and down

Discussion in 'Engine/Drivetrain' started by 1lowSr5, Sep 27, 2012.

  1. 1lowSr5

    1lowSr5 Addict

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    Hey guys I left work today drove about a mile and stopped at a red light and while waiting my truck started revving up and down on its own. As the light turned green I prepared to be moving to the shoulder but the truck ran fin and did t do it again. Is this a precursor to something or what should I check to see what the problem might be?
     
  2. jaybee

    jaybee Addict

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    u might got a vaccum leak..maybe it came lose ot got cut..
     
  3. Malessohomegrown

    Malessohomegrown Toyotaholic

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    22re right?Whenever I hear that its the MAS.
     
  4. 1lowSr5

    1lowSr5 Addict

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    It's the 3.slo I've checked vacuum but like I said it did it once and that's it. Was thinking maybe the idle censor or something. I know the truck is super cold blooded and spudders if I try to drive and she's cold. Just seemed really weird. Going to do some work on her this weekend, coolant flush oil. Harangue and try to find out what's rubbing or hitting in the front... Any other ideas? And malessohomevrown, was thinking maybe the MAF sencor got some water on it, maybe I'll spray it with some MAF cleaner this weekend. I do have a home made cold air on it...
     
  5. Malessohomegrown

    Malessohomegrown Toyotaholic

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    try that see what happens
     

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