1988 Dodge Ram conversion van B250.

Some time back I had a rough running issue and low power. My mechanic did a major tune up and emptied the catalytic converter of rust. Exhaust back pressure caused the low power. The rough running was cured by replacing a failed mini fuel injector.

But now, the smell of exhaust in the vehicle is heavy. How do I resolve this issue? Is it just a matter of keeping the rear door windows closed? Or, is a major exhaust system overhaul in my future?

 

Open windows in the rear, or bad rear door seals will let in exhaust at a prodigious rate. Especially with the front windows open.

 

I was afraid of that.

 

Rust along the rear frame rails will also let exhaust fumes into the interior through the floor.

 

I know my catalytic converter is shot. I have not taken a close look at the whole system but am considering replacing at least the catalytic converter myself.

Any helpful tips? Is there any welding involved?

If I feel like changing out the whole system, can it be done without welding?

 

I still need help on this. Anyone?

 

its going to take welding. MIG at the very least.
I had the exhaust smell when I had the rear windows open (and the fronts) as previously stated.
Now I run open header side pipe, no cat, no nothing... sounds beastly, no exhaust fumes ever, and I get better gas mileage in 3rd direct than I did in overdrive

 

While MIG or Stick welding might be the preferred method of assembling an exhaust system it certainly is not the only way. You can buy an entire slip-fit-together exhaust system at your local auto parts store, including a new slip-fit catalytic converter.

Once the pieces of exhaust pipe are inserted together and all of the hangers are in place you then install U-clamps to tighten everything. JC Whitney has been selling these type of exhaust systems for years for just about every car, truck and van ever made.

Not a bad option if you want to do everything yourself in the driveway or garage without using a welder (or if you don't know how to weld.)