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Help Idle jumps

Discussion in 'General Tech and Maintenance' started by azskateman, Mar 16, 2004.

  1. azskateman

    azskateman Junior Member

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    Anyone had any experience with the idle jumping from about 800 to 1300 and then back again? I do have a check engne light witch is because of the Knock sensor but it only comes on when the car has heated up.

    Dustin
     
  2. Tim@Canspeed.com

    Tim@Canspeed.com Member

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    The problem is quite common with Honda engine swaps. I've found alot of different reasons for this problem to occur so a simple answer I cannot give. I can say that the first thing you should check is your coolant level. Make sure it is topped up and no air locks are present. An air lock in the system can prevent coolant from reaching the Idle Air Control motor and will cause the IAC not to function properly. Search the problem on this web site. I thought I seen an archive or something on this very problem.
     
  3. 95sir

    95sir Senior Member

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    can a clogged filter on the iac do that?
     
  4. slammedb18acivic

    slammedb18acivic Senior Member

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    mine was the tps, took a throttle body of a 97 ls... wrks fine now
     
  5. civic_types

    civic_types Senior Member

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    Mine was the throttle body gasket + throttle body adjustment
     
  6. highperboi

    highperboi Senior Member

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    how does tps make idle go up?
     
  7. randerson165

    randerson165 Senior Member

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    That whole engine is sensors and the TPS is a sensor, if it is bad and not reading correctly or sending info incorrectly, your engine will not respond accordingly. A bad TPS is pretty common is swaps.
     
  8. Bl6CRX

    Bl6CRX Senior Member

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    yeah mine was like that too after my swap, however, my problem was that the spring was stuck, remove it an if necessary replace it...
     
  9. highperboi

    highperboi Senior Member

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    how do you take the TPS off?
     
  10. cws13

    cws13 Senior Member

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    I'd start with the cooling sys having air and checking the IAC valve first. If the TPS is ok, you take it off it will be out of whack after moving it.
     
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