I passed CA smog with a new catalytic converter.

[DocuDude]

Put on a new Magnaflow cat. Went to smog, and pased no problem here in Los Angeles.

My HC was measured at 14......max is 125 @15mph
" " 14.......max is 96 @25mph

My CO was 0.04 ....max is 0.79 @15mph
" "0.05.....max is 1.0 @ 25mph

ANdnmy NO, which has been my problem all along is now

NO was 564.......max is 1062 @15mph
NO was 570.......max is 1073 @25mph

MY OLD SCORE for NO was

My NO was 1330....max is 1062 @15mph
MY NO was 1073....max is 1073 @25 mph

All i did was the usual change sparkplug, fresh oil.....and about a month ago I put a can of seafoam in my full gas tank.

So if you are in trouble, go for a new cat.

 

[NocalFJ60]

Good job. You have any numbers from before the CAT change? Where you get the CAT?

 

[DocuDude]

Thanks NorCal....you helped me awhile back when I was diagnosing my high NO.

I will post my old NO numbers in my original post for comparison.

I got the cat from Downey off road (they are a member here on MUD)
Downey Off-Road Exhaust Systems

It is part #23894 halfway down the page.

 

[johnbill]

OK, sorry, but aaah...sooo...

universal requires welding, while bolt-on requires, like, bolts, right? Right guys?

I can't believe I had to ask.

 

[DocuDude]

Johnbill,

The answer to your question is Yes. I got the bolt-on. Took me awhile, but my bolts were 20 years of rust. If you do bolt-on for and old cat, get a good socket wrench set, PB-blaster, vice grips and a hacksaw.