hello i recentl did some work to my truck it is a 2001 dodge ram 1500 4x4 slt 5.2L and ever since we replaced the Plenum kit,cap and rotor,pcv valve,180 tstat and oil change my truck will randomly become sluggish, want to stall and make a pack pack sound like mini backfiring or something. I was wondering if anyone had any thoughts on what this could be??? im stumped and it is not throwing any codes at all. Any info would be great. thanks

 

check your cat if it rattles its bad or take out the front o2 sensor and see if it runs better.

 

+1 on the cat and sensors. Could be that simple. I love my gutted cat... im more of a dog person anyway lol

 

haha, thanks going to try that out today and hopefully everything changes for the better. i will keep you updated. anyway other then a rattling cat to tell if it is gone bad?

 

I just got back from a mechanic buddy and he hooked it up to a diagnostic tool and says the timing is out and this could be one of the reasons why this is doing this, he says it could be o2 sensor or alot of things anyone else have any thoughts??

 

just got done putting in a new pre-cat o2 sensor and as it stands now the problems are all gone. hope it stays that way! thanks to everyone for the help.

Kevin

 

I just put : ignition coil , distributor cap and button, wires and plugs and o2 sensor on mine and it still has a back fire in the top , : spits and sputters under pressure I was told it could be valves or timing ????? anything new ???? dodge 96 3.9 2 wd

 

My 95 3.9 didi the same so I had the cat gutted. Sounded good but got worse. It dtopped an injector. Then two then yhree and I was screwed. So after finding a ride I got the new ones and it was like a brand lnew motor

 

Did you turn distributor when replacing cap?

Timing is controlled by PCM and is not adjustable in the way most people think.

Double check routing of plug wires and firing order. There is a TSB in the FAQ/DIY section for correct routing of wires.

Remove upstream O2 sensor and let it hang - see if it runs better. If so, cat is clogged.

 

Can the cpu compensate if the distributer is 180 out???