tips on CAT removal
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From: Coastal North Carolina
tips on CAT removal
anyone removed the cats off their rangers? I just got my new exhaust system put on, but i still want more out of it. I have 2 problems though. the first is that here in NC we are getting emissions test in 2006 for all 95 and newer vehicles... mine is a '99. Second, there is that dang O2 sensor after the cats. Is there anyway to bypass it, or will the CEL be on all the time? Im trying to go the cheapest route so i dont want to buy new high flow cats.
Thanx for any help.
Thanx for any help.
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From: St. Peter
Actually, the cheapest way will probably be to buy new high flow cats. A "dummy" sensor for that o2 after the cat is probably 50 bucks or more, then your not going to pass emissions. If you buy an aftermarket cat on ebay from "catco" they only cost like 35 bucks or somthing, and you might still be able to pass emmissions.
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From: Coastal North Carolina
but then i have to get 2 of them , or do you think i could get by with using one where i had 2 in the first place.
I was thinking about using clamps to secure the new piece of pipe so i could put the cats back on if they ever do start the testing.
I was thinking about using clamps to secure the new piece of pipe so i could put the cats back on if they ever do start the testing.
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From: On A Ship, MI
if emmissions isn't a problem take a broom stick and nock the honey comb crap out of the cat.then buy one of thoes dummy sensors.
did that to my buddys 94 but here im MI there isnt any emmissions testing yet.
but since its older than 10years old i dont think he would need to be inspected.
did that to my buddys 94 but here im MI there isnt any emmissions testing yet.
but since its older than 10years old i dont think he would need to be inspected.
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From: St. Peter
plus for your buddies 94 you dont need the dummy sensor. And trust me, if you put those clams on there so they dont leak, you'll never get the pipe back off without breaking somthing. Swapping them for emmissions is a good idea, if you could get the pipes off. What you should do, is design a system where its emmissions legal, then move a lever/flip a switch, and have it bypass the cat. I'm not sure what you need to be emmissions legal. If i were you, i'd buy the dummy sensor, cut the cats off, then move over here to MN where we dont have emmissions testing.
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From: Coastal North Carolina
If i were you, i'd buy the dummy sensor, cut the cats off, then move over here to MN where we dont have emmissions testing.
About how much is one of those dummy sensors, and do they mess with the mixture of the fuel. I mean it would be worthless to take the cats off to gain power if the sensor messes it all up.
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From: St. Peter
because the sensor only sends one value to the computer, your truck might perform better or worse depending on temperatures, etc, because the computer isnt getting the signal telling it how rich/lean its running with the dummy sensor, so it could verywell hurt your performance. I've heard that Ford cat's are pretty good performance wise because they use a honeycomb instead of pellets like GM uses. If i were you and had to worry about that dang sensor, i'd just leavet he cat there, and put on a nice sounding exhaust, because unless your using it for strictly drag racing you'll probalby not notice the difference, unless there is somehting wrong with the cat, in which case i'd replace it.
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From: Northern PA
I'd leave the cats, and go with high flow exhaust after the cats. I don't think you'll get much improvement w/o the cats, and you'll have to cobble the computer somehow, and it will not run as well. You *might* be able to get rid of both cats and just go with one, but make sure the distance from the cat to the rearmost O2 sensor stays the same. I have heard it messes up the computer if you don't.
Fleet Mechanic
Joined: Sep 2003
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From: central ohio
i always knocked the catalyst honeycomb to bits with a long steel rod, on g.m. burn a hole in the baffle with a torch and the pellets will blow right out. older g.m.s had a plug you could remove (or it could rust away eventulley) no emmissions testing here yet.
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Joined: Oct 2004
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From: Indiana
I just did the samething on my 95 Ranger. I cut the cats off and welded a rethreaded nut to the new exhaust pipe for the o2 sensor. Now its 2 1/8 pipe with just a glass pack.Mine runs great no check engine lights etc. Open up the intake side along with the exhaust and you will notice a big difference in acceleration over stock.
I was also thinking ahead in case of emmissions testing, I set it up to were i could take two clamps off and reinstall the cats in minutes.
Good Luck with the exhaust
TR
I was also thinking ahead in case of emmissions testing, I set it up to were i could take two clamps off and reinstall the cats in minutes.
Good Luck with the exhaust
TR
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From: Coastal North Carolina
i already have a flowmaster cat back system, and a K&N with the "silencer" removed. i was just wondering if i could get a few ponies the easy way. i was thinking along the same lines as trail rider, but maybe it isn't worth all the trouble.
BTW it sounds really deep with the Flowmasters. I dont know what series it is though. ITs not quite as loud as i thought it would be, but it sounds great.
BTW it sounds really deep with the Flowmasters. I dont know what series it is though. ITs not quite as loud as i thought it would be, but it sounds great.