I have a ram with a 360 throttle body la motor. Not the one that came with the truck and I didn't do the swap either. It's been running rough with a miss fire so I figure I'm going to start easy and work my way up from there

 

I think its .035 but don't hold me to that...check spark plug wires too

 

i have found that the older small block likes .045" i have even ran plugs with the spark gap down next to the threads.

 

the 318 runs .035 so id just go with that

 

Thanks guys, not a spark plug problem.. It hesitates like a bastard under heavy load (half pedal pressed or more) misfires when cold and then selectively when warm. Also attempts to stall when driving after 4-5 mins I had to feather the throttle to keep it going. Any ideas?

 

carb or tbi?

 

Throttle body

 

check the coil

 

How do I check the coil with out plugging a new one in and hope for the best

 

get an LED test light (led one can show every pulse unlike a regular one) and put the clamp on one side of the coil and touch the other... make sure its flashing all the time at a constant rate. if its jumping when it sounds like its misfiring then go from there. its either an intenal short in the coil somewhere or theres something wrong with a sensor... but if its flashing normal then its not a problem up to that point... check your cap and rotor while your there too