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Idle Drop Off and Surge while in gear


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'94LandCruiserLover
New User

Feb 29, 2012, 12:40 PM

Post #1 of 3 (2018 views)
Idle Drop Off and Surge while in gear Sign In

I have a 1994 Toyota Land Cruiser w/4.7ltr inline 6 w/280K -- It idles fine until I put it into gear than it will surge and then almost stall and continues to do so while stopped and when driving until about 50MPH, then it's fine. Any suggestions? Thanks!


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Feb 29, 2012, 4:44 PM

Post #2 of 3 (1968 views)
Re: Idle Drop Off and Surge while in gear Sign In

 You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.



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'94LandCruiserLover
New User

Feb 29, 2012, 8:16 PM

Post #3 of 3 (1946 views)
Re: Idle Drop Off and Surge while in gear Sign In

I will give that a whirl on Friday! Thanks for your time and I'll let you know how it all works out!Cool






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