ENGINE IS SMOOTH ON CNG WHILE KNOCKS ON PETROL

  • Tiny
  • fahdaslam
  • 2007 Toyota Corolla
  • 4 CYL
  • 2WD
  • manual
  • 68,000 miles

Spark plugs changed, tappet adjusted, throttle serviced need ur suggestion. Hi 2carpros y it is so that car is smooth on CNG but rough on petrol?

Saturday, June 30th, 2012 AT 7:14 PM

1 Answer

  • Tiny
  • mhpautos
  • Expert
  • 29,803 posts

Have you run a scan for a knock sensor fault as yet?

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Sunday, July 1st, 2012 AT 4:58 AM

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