THE RPM HIGH EVEN ON PARK/NEUTRAL

  • Tiny
  • rosszaister
  • 2004 Chevrolet Optra
  • 174,000 miles

Hi. I'm driving 2004 Optra 1.8LT Automatic. Last time I'm having the problem with fluctuated RPM during cold engine. So I brought the car to the workshop and they clean-up my throttle body (disconnect all parts related including IAC, all socket and tube) and the problem been solved

But I'm having new problem day after that. For the past 7 years, my RPM only at 800 rpm at all conditions (either when I put on gear parking/neutral or stop at traffic light and change it to neutral). But currently, the RPM high up to 2000 rpm during parking/neutral, especially when I change my gear to neutral while engines running/waiting at traffic light, or waiting my sons at his school.

How to solve it? I want it back as before, at 800 RPM. Idle Air Control Valve problem? Throttle position sensor problem?

Thursday, December 29th, 2011 AT 6:00 PM

4 Answers

  • Tiny
  • rasmataz
  • Member

Start by cleaning out the IACV and see what happens

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Thursday, December 29th, 2011 AT 6:10 PM
  • Tiny
  • rosszaister
  • Member

Thank you. Will do as per advice.

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Thursday, December 29th, 2011 AT 6:15 PM
  • Tiny
  • fixitmr
  • Member

No CEL?

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Thursday, December 29th, 2011 AT 6:20 PM
  • Tiny
  • fixitmr
  • Member

May need computer re program of throttle functions.

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Thursday, December 29th, 2011 AT 6:23 PM

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