I have a 96 R1500 with 5.2 auto 4x4 and yesterday i was going down the road and it acts like it is losing power and dying out and then it kinda gets back normal ? It has done it before but not alot ! Could the IAC cause that or a bad pcm ?

 

Not the IAC it only controls the idle rpm. Could be the pcm but there are a lot of other things that could cause your problem before you swap out the pcm. How's your plenum, was it repaired? How recent are the plugs and wires and cap/rotor? Are the spark plug wires routed per tsb so they don't cross or touch other wires? May want to change front O2 sensor, coolant temp sensor, and pcv valve if it's been a while.

 

How many miles on it?

 

Plenum was done with alum plate and felpro gasket as well as tune up stuff the same time about 1 yr ago but the truck never gets drove ! Kinda acts like its starving for gas ?

 

Check the fuel pressure! Pump may be on it's way out. How many miles on it?

 

Don't know ? pump was used a few yrs ago ?

 

It does it more if pulling a hill or under load ?

 

Clogged Catalytic converter?

 

Hasn't had a conv since it was a month old ! Southern truck no use for that **** !