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RPM IS HIGH WHEN THE GEAR IS IN PARK AND NEUTRAL POSITION

Tiny
SEBASTIAN_PERSONAL
  • MEMBER
  • 2000 MITSUBISHI ECLIPSE
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 160,000 MILES
I just replace a new TPS, MAP, and Air Control Valve sensor. Yesterday, I also had a mechanic shop put in a new oxygen sensor. When I start up the motor and its in Park or in a neutral, it sounds like the RPM is higher pitch than normal, but when I put it in first gear or reverse, it goes back to a normal rpm pitch. The RPM meter goes up to #2 in my dash board and when I put it in drive and reverse. It goes down to below # 1. Here are the codes that was given to me (Po110 and P0505). Please help and thanks!
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Thursday, February 19th, 2015 AT 9:19 AM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Try cleaning throttle plate on both sides and iac hole with choke cleaner and check for a vacuum leak, like broken lines, holes in them etc. The 110 is intake air temp circuit malfunction so check for air leaks prior to throttle body as tha tmay be causeing the 505 code. However the 505 code could be a bad iac motor, wiring or pcm problem so a pro shold check that.
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Thursday, February 19th, 2015 AT 9:40 AM

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