A Anonymous Guest Aug 21, 2004 #1 EFI motor, what causes the clacking noise and poor running when pulling with these engines?
C CobraSix 2K+ VIP Aug 21, 2004 #2 Try going up in octane level, and try checking your plugs. Make sure your air filter is clean. Slade
A Anonymous Guest Aug 21, 2004 #3 just replaced both and tried 89 it will help for a while then it returns.
