ocskipper Posted June 24, 2009 Share Posted June 24, 2009 My stock 87 2.5L has a clogged cat, at least I'm about 99% sure :fs1: It rattles really bad under acceleration and idle and I have experienced a loss of what little power I had. I am not in a position to replace the CAT right now so I was wondering if it would be better to run with no cat or muffler (straight headers) or just with the clogged cat. I know I will eventually foul my O2 sensor with the cat like it is, if i havent already. Plus it is really annoying/embarrasing. But i also know I will lose power/back pressure with no muffler. This would be a very temporary fix to continue getting me to work and back until I can weld it all up again. What would you do? :dunno: -Skip :USAflag: Link to comment Share on other sites More sharing options...
redneck23ms Posted June 24, 2009 Share Posted June 24, 2009 can you cut the cat out and stick a piece of tube in there and clamp it in until you are able to replace the cat? thats what i would do Link to comment Share on other sites More sharing options...
mnkyboy Posted June 25, 2009 Share Posted June 25, 2009 I'm running a flowmaster muffler with no cat on my 2.5L and it runs pretty good. Alot of people gut the cat,take it off and break/beatout all the catylist material. it runs like it would with no cat but your exhaust might have a wierd hollow sound to it. Link to comment Share on other sites More sharing options...
Wildman Posted June 25, 2009 Share Posted June 25, 2009 :agree: I've done this several time, there is really no ill effects to run with a hollowed out cat. Been running my cuber for the past 3 years with a hollowed out cat, I don't feel like spending over $300 for a replacement. But........We don't have sniffer test up here on anything older that '96 :D What every you punch out, save it, it's sill worth $$$. Unless platinum has fallen in the market :hmm: Link to comment Share on other sites More sharing options...
rworks Posted June 25, 2009 Share Posted June 25, 2009 My 87 4.0L has no cat anymore. The old one went bad and the shop forgot to put in a new one when I replaced the muffler last year. Seems to run just fine without it. Link to comment Share on other sites More sharing options...
64 Cheyenne Posted June 25, 2009 Share Posted June 25, 2009 I punched out the cat on my 90 caravan and experienced a loss of MPG. This is what I did to my truck. Punched it out,tubed the inside. don't know how well it'll work as I don't see the truck being done till this Fall or Winter. Link to comment Share on other sites More sharing options...
1990 Pioneer 4x4 Posted June 25, 2009 Share Posted June 25, 2009 If you're looking for a quick fix, why don't you just drill out the clogged cat... Link to comment Share on other sites More sharing options...
dakal Posted June 25, 2009 Share Posted June 25, 2009 yeh Link to comment Share on other sites More sharing options...
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