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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
Hello,

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. Please help and thanks!
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Thursday, February 19th, 2015 AT 12:35 AM

3 Replies

Tiny
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  • MECHANIC
  • 31,937 POSTS
You may have a vacuum leak at the inlet manifold, do you have access to a scanner with live data? Can you give me some accurate RPM readings at idle and in gear?
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Thursday, February 19th, 2015 AT 3:26 AM
Tiny
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Thanks! 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. Yes, I do have access to a live data.
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Thursday, February 19th, 2015 AT 6:26 AM
Tiny
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  • MECHANIC
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I would be looking for a vacuum leak first, spray a little brake clean around the manifold a the engine will rev up if you hit a vacuum leak.
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Thursday, February 19th, 2015 AT 2:02 PM

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