2000 Mitsubishi Galant High idle

Tiny
ROBERTKARNE
  • MEMBER
  • 2000 MITSUBISHI GALANT
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
When I start car it idles at 2700 rpm when I drop it in drive it drops to 1300 rpms buy feels like it wants to take off still and it slept out of gear or doesn't shift correct. I have tore my engine apart looking for the problem from the throttle body to changing every gasket seal and vacuum line. I have a new throttle body comming with a iac and is already a just ed for my car hoping this will finally fix my problem after that u don't know what else it could be I checked the sensors for volts and the main ones that control idle are reading fine so I'm at a loss if this does not fix the problem.
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Tuesday, September 22nd, 2015 AT 8:51 PM

2 Replies

Tiny
CAR-MAN145
  • EXPERT
If you could see what the o2 sensors are reading I have had a few of these with lower intake gaskets leaking that will cause the high idle. If the o2 sensors are reading lean (low below 500 all the time) then it is a vacuum leak
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Wednesday, September 23rd, 2015 AT 2:09 AM
Tiny
HMAC300
  • EXPERT
Clean throttle body plate on both sides and iac hole with choke cleaner then check for a vacuum leak hose off etc.
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Wednesday, September 23rd, 2015 AT 6:59 AM

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