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Idle problems

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by K5Greek, Dec 21, 2005.

  1. K5Greek

    K5Greek 1/2 ton status

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    My truck has a weird idle while it park. It will run fine when its started but when it gets warm it starts to surge. I've replaced fuel filter, egr, o2 sensor, wires, plugs, and cap. Do you think a rusted distributor could be the problem or maybe like a IAC or something? need help
     
  2. btolenti

    btolenti 1/2 ton status

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    I have heard a bad coolant temperature sensor will cause this. Cheap part to replace too, should only be 10-15 bucks.
     
  3. erik59

    erik59 Registered Member

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    Mine did the same thing until I found out I had vacuum line off of the TBI base.

    Erik
     
  4. K5Greek

    K5Greek 1/2 ton status

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    Yea i checked for that too and there are no leaks. For the coolant sensor im going to be replacing the radiator cause it cracked and im throwing in a new sensor so ill see if that helps any
     
    Last edited: Dec 22, 2005
  5. Thunder

    Thunder 3/4 ton status

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    Check the TBI base gasket too. Pretty common for them to leak and cause idle problems.
     

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