had an after market cat installed that is about 1/2 the size of the original- the inspection guy said that it will pass with a new one- it did- but not sure if i am loosing any performance, more smoke pass thru- it is running rich- but not as much smoke would come out with the older oem cat. Any ideas??
after market cat?
- Thread starter recyclingthepast
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We'll need a lot more detail if you're going to receive some good advice about your truck. I've got an aftermarket cat on mine that passes emissions just fine but it was running rich because the carb was failing after 240,000 miles. Sounds to me like the cat's doing it's job, but something forward isn't quite up to snuff.
- Thread starter
- #3
thanks for the reply-the mechanic retarded the timing to help it pass emmisions we were having problems with the NO #'s-we have not had time to tune it up since it finally passed with a new cat? my main concern is if the new considerably smaller cat will hurt my excelleration- or have any major effec. It sounds louder now- the thing was put on cocked so the plate on the botton is at an angle????? they said this is the only way it would fit- any thoughts?Phaedrus06 said:
I would not worry about it if you passed smog. It has to be running pretty good to pass smog even with a new CAT. The CAT can only do so much.
I doubt you have an exhaust restriction but you can check with a vacuum guage hooked to the intake manifold while driving.
http://www.ih8mud.com/tech/vacuum.php
Just be glad you passed smog and can get the smog monkeys off your back..
I doubt you have an exhaust restriction but you can check with a vacuum guage hooked to the intake manifold while driving.
http://www.ih8mud.com/tech/vacuum.php
Just be glad you passed smog and can get the smog monkeys off your back..
- Thread starter
- #5
thanks for the reply and the info on vaccuum- got any other tidbits that are helpful?
matt
matt
what aftermarket cat did your get? mine is like swuiss cheese, and i need to replace it.
what about the O2 sensore, or any brackets?
what about the O2 sensore, or any brackets?
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- #7
got one from a place in medford nj- chinese i guess, but i got a guy in nj in ocean county who us a toyota mechanic for 20+ my guess is the guys that put on my cat put on a crudy one- so= i will be the one with swiss chees and a good inspection sticker- got any other guys your way? keep in touch- not many people who like cruisers in nj!
recyclingthepast said:
thanks for the reply-the mechanic retarded the timing to help it pass emmisions we were having problems with the NO #'s-we have not had time to tune it up since it finally passed with a new cat? my main concern is if the new considerably smaller cat will hurt my excelleration- or have any major effec. It sounds louder now- the thing was put on cocked so the plate on the botton is at an angle????? they said this is the only way it would fit- any thoughts?
If it sounds louder then air is passing more freely through the new cat. I used to have an 89 isuzu trooper (before I had my 60) and I removed the cat, without the cat the engine sounded louder and you could (almost) feel the difference in acceleration(maybe it was just the louder sound.)
I put in an aftermarket CAT on a year ago...it passed smog OK but it still stinks (literally). My carb is probably running rich also.
Toad
Toad
how does the aftermarket cats handle to 02 sensor? do they has their own, or do you need to mod tham to use existing ones?
