Hi all,

new member here, and I need some info regarding the stock exhaust system on my 1998 V10 Ram 2500. My problem is that I failed an emission test the other day, I currently have a Magnaflow exhaust fitted from the Y pipe and back. I managed to find a catalytic converter from Magnaflow which I'm gonna fit prior to my new test. Now....back to my question; how many oxygen sensors where fitted to the stock exhaust? And where were they located? There is a hole in the new catalytic converter which I assume is for a oxygen sensor of sorts, just need to find a connector for it somewhere.

Just to mention I only had the car for 2 months and have very little knowledge about these cars.

Thanks

Regards Zakk

 

I had varying results doing a search on how many yours is supposed to have, sounded like 1 each side pre-cat and one after cat so your going to have to snake belly under the truck and look for pigtails that are hanging or tied up under the frame. I would hope the previous owner would not have cut them off. Don't forget the gasket and some never seize on the sensor threads when you install them. Good luck.

 

Thanks bud, I'll have a look under the car tomorrow for any pig tails.Was the stock system a dual pipe all the way to the back or did it merge to one pipe at some point, meaning a total of 3 sensors from stock. I am pretty sure the headers are stock as it all looks to be rather un-disturbed in the engine bay.

Thanks

Zakk

 

I do believe, if your truck has Federal Emissions (not california) you should have two. One pre-cat, one post-cat. Pigtails come down off the trans. One is right up on top of it, and a bear to get to....

 

Thanks for the info, I got a feeling I'll be spending some time under the truck tomorrow.

Zakk

 

That hole in the cat is for a fresh air supply. You should have an air pump on the right side of the engine driven by the belt. The fresh air helps reduce emissions if I recall correctly.

 

Aha, good call, I've seen a piece of hose under the car attached to nothing. Thanks for the advice

 

Did you not know the exhaust was butchered on the truck before you bought it? Always, ALWAYS check emission stuff when buying a used car, especially if you live where they require emissions inspections.

 

And I would be surprised if it came from factory with headers......

 

Nice looking ride.

My 01 v10 with federal emissions has 2 identical cats side by side just in front of the muffler. One for the right head and the other for the left head. A single air line runs from the air pump on the lower right side of the motor and splits in two just before the cats. 1 line into each. I have 2 O2 sensors pre-cat, no post cat sensors. There is a very short y pipe that joins the rear of the cats into a single inlet on the muffler.

I'm nearly positive my friends 98 v10 was the same.

Hope this helps.