Engine is smooth on CNG while knocks on Petrol

2007 TOYOTA COROLLA
68,000 MILES • 4 CYL • 2WD • MANUAL
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FAHDASLAM
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  • 27 POSTS
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?
Jun 30, 2012 at 7:14 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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