My truck is not running right. I need help. Before it was idling to low almost stalling, now it is not. When everit gets up in high RPMs the engines Starts to bogg down. It sounds like I'm putting a load on it, like towing a heavy trailer. It's a 1997 Dodge Ram 1500 3.9L V6 RWD. I've changed the IAC and the fuel pump and filter are brand new. Im at a brick wall. I need to get back into a truck again, I'm sick of driving my Dad's Girlfriend's Subaru Forester, it's so degrading. Please help me!

 

failure to rev up to higher rpm's is likely a clogged up catalytic converter. your local muffler shop and check it for you. if so, and if you want to do any exhaust mods, it would be a good time to do it all.

 

I agree that its likly the cat. you can check it yourself with a temp gun. if its cooler after the cat then its most likly clogged. you can also hit the cat and check for rattling.

 

There is no CAT on it or a muffler. Its cut off after the Y-pipe. O2 sensor is intact.

 

i had a similar problem, check signature for spects. on my truck i went to drive it one day and put it in drive nothing gave it gas thinking it was stuck reved it to 3 to 4 thousand rpm got it to move a little, 4 thousand dollars latter i have a rebuilt tranny

 

CAT was disgused for appeal and yes it is clogged, it does moves and drives just terrible. im replacing the cat tonight and i hope it is the prob.