87 F250 I have replaced the carb,rotor,wires,plugs,cap,oil,new fuel.but when you accellerate up to speed the motor makes a poping sound could this mean that the catalitic converters are clogged there are two and two mufflers. Any advice would be appreciated greatly Thanks

 

sounds like your timing may be off. what engine is this?

 

My engine is a 351 W holly 4160 carb dual exhaust with auto matic trans.

 

cat converters are a possibilty like you mentioned but first id check the timing and double check to make sure the plug wires are in the correct order as you mentioned you had just changed them

 

I'll do that thanks,and keep you posted