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?

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

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  • Tiny
  • Mhpautos
  • EXPERT
  • 30,742 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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