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Engine RPM remains at 2000+ RPM at idle (instead of ~800)

Tiny
MURAJITH
  • MEMBER
  • 2007 CHEVROLET OPTRA
  • 55 MILES
Car details: Optra 1.6L VGIS engine, Manual transmission.

Problem: Since last 2 days, engine rpm remains at 2000 Rpm at idle.
Saw the forum talking about cleaning the throttle body or Idle Air Control Valve.
How to do and also know which is IACV?

The service station even without seeing the vehicle said MAP sensor or Throttle position sensor need to be replaced? Is that required?
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Thursday, July 12th, 2012 AT 11:28 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It could be either what he's said. But it wold hurt to cleanthrottle plate to see if that is it first. Normally a tps or map will set a code though unless it is a blocked or leakingvacuum. Here is pic off a2.0 optra as you didn't give enginesize. The iac hole if ther eis one will be oblong on the throttle plate hole. Clean plate on both sides wipeoff material and put duct work back on as the car wont' run right without it.
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Thursday, July 12th, 2012 AT 12:52 PM
Tiny
MURAJITH
  • MEMBER
  • 2 POSTS
Thanks hmacc300.

I had noted the engine size. It is 1.6L engine.

Will try the procedure u suggested.
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Thursday, July 12th, 2012 AT 12:59 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It shold be similar
my mistake
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Thursday, July 12th, 2012 AT 1:00 PM

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