plugged cat

Britt Crowell Britt at BrittCrowell.com
Fri Feb 29 07:36:55 PST 2008


> Yep,  in my z28.  It rattled pretty good for a few weeks, then one day
> on a ski trip to Vermont last winter it wouldn't accelerate any more.
> It would idle and run just fine up to about 3000 rpm,  then just fall
> flat on its face.  When I pulled the cat I found a piece about 8" long
> had beat and bashed its self down the pipe and plugged it up solid.  I
> had an almost perfect cylinder of matrix material,  about 3" in diameter
> and 8" long.  I replace it with an aftermarket cat before my next sniff
> test.
>

Sweet I got $.02 to put in on this! About 2 years ago my wife's '02 
GrandPrix did the same thing. It was amazing how many people looked at the 
car and couldn't figure out what it was. Even the GM dealer with a Tec-2. 
Finally a local Indy figured it out buy making pressure monitor to screw 
into the O2 sensor position and observing the insane pressure buildup. He 
even got it replaced under warranty by the dealer and only charged us $50.

On my old '89 200tq that I had replaced the turbo on still smoked terribly 
after the replacement. One thought was the oil was saturated in the cat so I 
gutted it. I had a emissions test done before I sold it in Colorado and it 
passed with an empty cat.
As it turned out the oil was all in the exhaust system and just needed to be 
burned out.
____________
Britt





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