The Ford Barn - View Single Post - New engine - intermittent backfiring

Big hammer · 10-19-2020, 08:49 AM

After it gets warmed up and is acting up, pull the coil wire and hold it 1/4 in for a head nut, you should have a blue spark. If you have good spark ,look at fuel flow remove the carburetor drain plug to see good flow. On a fresh engine it is tight so MMO in the gas could help, 4oz per 10 gals or more.

10-19-2020, 08:49 AM	#8
Big hammer Senior Member Join Date: Jun 2014 Location: Land of Lincoln Posts: 3,131	Re: New engine - intermittent backfiring - stuck valve? After it gets warmed up and is acting up, pull the coil wire and hold it 1/4 in for a head nut, you should have a blue spark. If you have good spark ,look at fuel flow remove the carburetor drain plug to see good flow. On a fresh engine it is tight so MMO in the gas could help, 4oz per 10 gals or more. __________________ Don't force it with a little hammer tap, tap, tap get a bigger hammer tap done