Re: 454 crusader back fires in rpms of 3200?????
first thing id do is a compression test and then a leakdown test. this will tell you if the motor is mechanically sound
That will tell you if you have good compression and does not mean its mechanically sound.
Where is the boat backfiring from? Exhaust or out of the carb?
Could be a timing issue (ignition After TDC or way before TDC, valve not seating,plugs,wires distributor. Overheat could be a cooling issue or your engine is running to lean. Need more info to determine...
