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1990 Mitsubishi Truck High Idling

Tiny
RALBUILT
  • MEMBER
  • 1990 MITSUBISHI TRUCK
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 125,000 MILES
I have a 1990 Mitsubish mighty max pickup and the idle is running very high. It almost feels like its stuck or something. My truck will travel at 30 mph with me not even stepping on the peddle and tends to flood out. What might be the problem?

thank you.
Raul
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Wednesday, April 1st, 2009 AT 12:54 PM

1 Reply

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Take off the IAC moduel and make sure teh pintle iss clean and moving freely.

If thats good make sure the throttle body is clean and the throttle cable isnt hanging up.

If thats good then your going to have to check your vaccum lines for a crack in it or ahole causing air to be sucked in increasing idle.

That can increase it up to 1500 rpms!
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Saturday, April 4th, 2009 AT 2:16 PM

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