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08-06-2007, 01:59 AM #1
- Join Date
- Apr 2007
- Location
- bloomfield nj
- Posts
- 513
Red- 1998 trans am
how do you know if your catalytic converter is clogged
Yesterday after a nice run with my car , it just shut off.I tried to turn it back on and would just shutter and turn back off.I start the car back on and would stay on running rough and then shut off.I did notice that my car was making a vibrating noise from the cats , any help would be really appreciated.
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08-06-2007, 04:48 AM #2
- Join Date
- Aug 2005
- Location
- Pittsburgh, PA
- Age
- 42
- Posts
- 21,720
My life is a- Ben Stiller movie.
i dont' think that's the cat. I had a shitty cat and it just smelled of exhaust and threw an SES code every once in a while.
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08-06-2007, 06:53 AM #3
- Join Date
- Sep 2005
- Location
- NE Indiana
- Posts
- 541
Black- 1998 Trans Am WS6 'Vert
If your exhaust gets quiter and your engine seems like it's losing power, especially at higher RPMs, your cat is probably clogged. This is usually preceeded by rattling noises from the cat as it's guts start falling apart.
Johnny B - '98 "Triple Black" WS6 Convert, M6, All Options, ASC #3030 (1 of 50)
KBDDSFC, DGM C/F Tonneau, MTI C/F Lid, K&N, HPP-III, 160 T-stat, Pro 5.0
Link to Firebird Production Breakdowns
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08-06-2007, 08:48 AM #4
- Join Date
- Nov 2005
- Location
- NC
- Posts
- 36
Sunset Orange Metallic- 2002 Pontiac TransAm WS6
Does a bad converter always cause a code? My WS6 feels weak but no codes at all. I haven't noticed any odd smell from the exhaust.
I can't figure it out.
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08-06-2007, 09:35 AM #5
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08-06-2007, 12:07 PM #6
could be a cracked upper plenum. had the same problem on a 99 grand prix. see if u can smell coolant in the tailpipe. that would be a dead giveaway
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08-06-2007, 05:35 PM #7
you could measure the temp on both sides if one side is alot higher then its prob clogged mesure right before the cat
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08-07-2007, 10:59 AM #8
- Join Date
- Mar 2007
- Location
- NC
- Posts
- 421
NBM- 1998Z28
I thought that was the purpose of the back 2 oxygen sensers to let you know then your cats are dieing?
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