RPM increased

2003 CHEVROLET OPTRA
70,000 MILES • 1.8L • 4 CYL • TURBO • 4WD • MANUAL
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RAMESH SACHDEVA
  • MEMBER
  • 1 POST
Sir, The RPM is increasing while in neutral and driving. it is going up 3000 to 4000 and some time it is normal.
Please note car has installed CNG kit.

Thanks for your help.

Ramesh
Feb 11, 2018 at 3:44 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,562 POSTS
It sounds like the PCM is going out but lets start by running the codes here is a guide to help us confirm the issue.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
Feb 13, 2018 at 3:08 AM
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