95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

3VZE idle bounce problem

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Old Jan 31, 2004 | 06:59 AM
  #1  
CRogge's Avatar
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From: Lawrence, Kansas
3VZE idle bounce problem

Hey guys,
I am having an intermittant, engine warm, problem with my idle where the engine will rev up to about 1250, try to stay, and then drop suddenly to 800 or 900 RPMs then rev right back up. Does this sound like a vacuum prob? I checked what hoses I could and didn't find anything. I also have some hesitation until the engine warms up if that helps. The plugs are new. Thanks for any help, -Chris
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Old Jan 31, 2004 | 09:52 AM
  #2  
AgRunner06's Avatar
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Joined: Dec 2002
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From: The Lone Star State
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It sounds like it could be the TPS.

Check out this page.

The symptoms of a bad or misadjusted TPS are near the bottom of the page.

Do a search and you'll find a lot of info.



EDIT: It probably wouldn't hurt to clean your throttle body. You might as well eliminate the easy stuff first.

Last edited by AgRunner06; Jan 31, 2004 at 09:54 AM.
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Old Mar 26, 2012 | 06:57 PM
  #3  
hmongyota's Avatar
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Hey crogge... i know it has been 8 years already... but i am having similar problems with my 3vze... did u ever figure out what was wrong with it? Was it the iacv?
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