Plugs look great also. We have had the carb for 5 years and this is the first time this has happened. Its a holley 750 double pumper with the power valves taken out. Thanks to anyone that can help us on this matter.lugs look great also. We have had the carb for 5 years and this is the first time this has happened. Its a holley 750 double pumper with the power valves taken out. Thanks to anyone that can help us on this matter.