swift13 Posted September 14, 2008 Report Posted September 14, 2008 I think my cat might be going bad but im unsure. I have a new oem cat that i bought for my 89 2.8 gp but never put it on. my question is will this cat work on my 95 3.4 cutty? its also about 7 years old Quote
Andrew Posted September 14, 2008 Report Posted September 14, 2008 it should be fine as long as the inlet and outlets are at least 2.25 inches. Quote
swift13 Posted September 14, 2008 Author Report Posted September 14, 2008 i think they are i will double check to make sure and i will have a fun time swapping it out THANKS Quote
Andrew Posted September 14, 2008 Report Posted September 14, 2008 and i always recommend replacing the 02 sensor when you replace the cat. just makes sense. Quote
pontiacmaniac94 Posted September 15, 2008 Report Posted September 15, 2008 and i always recommend replacing the 02 sensor when you replace the cat. just makes sense. x2! but it is a major pain to get to, and sometimes breaks when you are trying to get the O2 sensor off... why not just put a straight pipe in it? Quote
jrcuttymann Posted September 15, 2008 Report Posted September 15, 2008 Just remember one thing cats don't die they are murdered. So if yours is bad there could be something else wrong Quote
ns87 Posted September 15, 2008 Report Posted September 15, 2008 Just remember one thing cats don't die they are murdered. So if yours is bad there could be something else wrong Yup, last month my ICM went bad and misfired on two cylinders. That dumped enough fuel to make the Cat glow red hot after a minute or two. Wound up killing it Quote
swift13 Posted September 16, 2008 Author Report Posted September 16, 2008 i dont think i will put in a straight pipe, i wanna keep a cat there i think Well if it went bad due to other reasons im hoping those problems are already fixed. i have replaced just about everything that could be replaced besides the cat and icm but if i change the cat and get good life (even for a little while) i will change the icm and check out whatever else i can. its not glowing at all, at least not yet so i can only hope... Quote
AWeb80 Posted September 17, 2008 Report Posted September 17, 2008 straight pipe FTW trust me....I get a little better mileage and power Quote
pontiacmaniac94 Posted September 17, 2008 Report Posted September 17, 2008 straight pipe FTW trust me....I get a little better mileage and power x2!!! you will feel a little more kick on the highway, it is kinda fun! and the little bit of backfiring is always a plus!!!! not only that, but you can smell the gasoline! woohoo! Quote
swift13 Posted September 20, 2008 Author Report Posted September 20, 2008 ok is there anything extra i need to do to put in a straight pipe or is it pretty straight forward. Take out the cat and and put in pipe Quote
55trucker Posted September 20, 2008 Report Posted September 20, 2008 Wellllllll...if you've still got the original piping under the car......the dia. of the pipe in front of the cat is not the same as the dia. of the pipe going to the mufflers.....2 1/2" (3.4 eng.) into the cat....and 2" to the resonator & mufflers. Quote
swift13 Posted September 20, 2008 Author Report Posted September 20, 2008 ok so i would just have to get a reducing sleeve right?? Quote
55trucker Posted September 20, 2008 Report Posted September 20, 2008 Again.....if the original pipes are still under the car.....the back end of the cat will have a square flange with 4 bolts on it that the intermediate pipe is fastened to by the same.....if you put in a straight pipe you'll need to remove the flange on the end of the intermediate pipe and use the reducer to get the proper dia. needed. Quote
swift13 Posted September 20, 2008 Author Report Posted September 20, 2008 well i was just gonna cut off after the flange and get as straight a shot as possible and it is all still original Quote
55trucker Posted September 20, 2008 Report Posted September 20, 2008 That should get you back on the road....and juuuuust a liiiiiiiiitle bit louder.... Quote
88red4cyl Posted September 20, 2008 Report Posted September 20, 2008 Wait, the cat is bolted on? I always thought it had to be cut out and welded back in... Quote
swift13 Posted September 20, 2008 Author Report Posted September 20, 2008 its welded to the down pipe but right after or behind it it has a flange at least for this application all cars are different some are even bolted on both sides and others arent at all Quote
swift13 Posted September 20, 2008 Author Report Posted September 20, 2008 That should get you back on the road....and juuuuust a liiiiiiiiitle bit louder.... how much louder my muffs are shitty enough Quote
AWeb80 Posted September 20, 2008 Report Posted September 20, 2008 not much...my GP is NICE now after the cat is off. Quote
oldscsc Posted September 20, 2008 Report Posted September 20, 2008 not much...my GP is NICE now after the cat is off. Actually sounds better with it off or just stinks? Quote
AWeb80 Posted September 20, 2008 Report Posted September 20, 2008 not much...my GP is NICE now after the cat is off. Actually sounds better with it off or just stinks? smells great....and sounds great Quote
swift13 Posted September 22, 2008 Author Report Posted September 22, 2008 sounds good car looks good too what are you running down stream of the cat?? Quote
swift13 Posted September 22, 2008 Author Report Posted September 22, 2008 thats awesome now i am for sure gonna put in a straight pipe Quote
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