I have a 99 dodge ram 2500 v10. Yesterday on my way home from work, I lost alot of power. ALOT. It idles rough and low at about 550 and when I'm on the gas it sputters real bad and has troubles going over 40 mph. The weird part is it only does it when the truck is in gear. When the truck is in park it it idles a alot better but still a little rough. I took the truck to schucks and used their little diagnose thing and it read common code (i forget the number) but it said running lean check bank 1. I popped the hood check for vacuum leaks. No leaks. Checked the air filter, still good. Then it started pissing down rain. I was wondering what should I check. I know its been like 6-7 months since I did a tune up and replaced the plugs, wires, and distributor. Oil level is good. The dude at shucks said it can be a dirty 02 sensor but it normally spits that code out to. So I don't know. Any insight would be greatly appreciated.

 

Sounds like the cat is clogged

 

+1........

 

Can you unclog it or do i need to replace the whole thing? Just googled it and no you cant unclog it but I know what to check for now. Anymore Ideas would be helpful though. Just in case.

 

It's a V10, I'm not so sure it's the cat(no plenum problem). Crank sensor maybe?

 

Im not 100 present on how to diagnose a faulty plenum but I saw the sticky I will read through it. But I didnt even think of the crank shaft sensor. I will keep that in mind too.

 

That's what I'm saying, you don't have to worry about the plenum.

 

Ok Well I just read through it anyway and I will be a drilling and checking pressure tonight. Thanks yall I will let you know what I find.

 

You can "unscrew the o2" and see how it runs. While it's out, you can get an adapter to check pressure, instead of drilling a hole. Not many here have v10's, but I have not seen any probs as far as clogged cats go with them.

 

I think I read on here another easier way to check it is a digital thermometer the inlet temp shouldn't be that much warmer than the outlet on the cat