Thread: Low rpm back fires, 77 2,7 S
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petrolblue83911 petrolblue83911 is offline
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Join Date: Jul 2005
Location: Boston, Mass
Posts: 927
A bad or fouled plug can cause the car to backfire/hesitate/ run rough

I’d check the plugs first - even though they are new .

Check gaps, coloration, look for debris around the electrode
Old 07-10-2018, 09:42 AM
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