Not Bounce
Engine turned backwards just a hair when you let off the starter.
If rocker movement is good on both sides...we can rule out backfire from trapped exhaust. Like you get when an exhaust lobe is wiped out.
How is the engine running , in general, at idle speed? If it's rough...You could have a vacuum leak. Enough leak could cause a lean backfire and not be the carb causing it. Repeated reving and letting off will get fuel mix in the intake all messed up. Some runners end up pig rich and others near dry. That could have caused the first backfire and blown a gasket out or vacuum hose or cap off.
That carb mounted with two gaskets and the thin adapter plate?
E-carbs on Performer intakes are famous/notorious for vacuum leaks without the plate. Not enough contact area for the square bore carb flange at the spread bore on the intake.
Still thinking about the click/whack moving around.
Clay
__________________
All the federales say,they could've had him any day
They only let him slip away, out of kindness...I suppose
Poncho & Lefty
|