running no cats
Ok, so im pretty sure my cats are clogged, so im going to unbolt them tomorrow and find out. If they are, Will it hurt anything to just take them out and run a straight pipe? Im not worried about emissions, or loudness...
and How do you get the cats off without getting the CEL to come on? |
im almost positive you'll have a cel cuz you'll have to take out the o2 sensors. be ready for it to sould like **** too lol
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haha, i was really hoping that it would sound as good as my wifes I6. Its running with just the headers right now. sounds like a BEAST! lol
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with no o2 sensors your truck will run in retard mode and you'll be wasting fuel. your timing will be retarded without them
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Meow?!!
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your timing will not be retarded without them
if your CEL is on after you cut them off, your computer will be running in open loop open loop is a default mode where the computer is operating on pre determined settings. there was a PCM update available for 98-00 rangers for premature catalyst failure codes. this update shuts off the downstream 02 sensor. it was done to my truck, i have no CEL, no cats, and it doesnt sound like s*** i dont think. if the light is on, you can order MIL eliminators that are inline resistors that plug in and give the 02 sensor a false reading that makes the computer think they are still there |
hmm. thanks justing. i iwll have to look into that
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Originally Posted by Toreador4x4
(Post 1490127)
y i have no CEL, no cats, and it doesnt sound like s*** i dont think.
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oh god, srtraight pipe would sound horrible, i have a flowmaster 50
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Originally Posted by 99offroadrngr
(Post 1490505)
He said straight pipe so i said it would sound bad lol you have a muffler don't you?
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Do the Evo/STI defouler trick and you can run catless for the cost of 5$ per converter. I did it on a number of vehicles with the exact same problem and perfect results.
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um whatis the evo/sti defouler trick? lol
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Originally Posted by Toreador4x4
(Post 1490617)
oh god, srtraight pipe would sound horrible, i have a flowmaster 50
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Mother of all defouler threads... - 8th Generation Honda Civic Forum
This is what I found on Google.. |
Ok, now i want to hear justins truck lol
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It dosent make a difference in sound until you get enough flow passing through. On my IX I can't tell a difference until I'm in boost, which means there is a significant amount of flow resulting in a much different sound (very ferrari-like)
If you have big cams expect flames during shifts. The civic web link above is really an excellent explanation. I would purchase the "help" brand defoulers they sell at autozone, pepboys, ect. You can get a pair of 2 for 5$. On a Y-pipe setup thats 10$ for the fix. I think the part number I used was 42002, or 42009. |
hmmm.. So I really like how justins truck sounds.. how loud is it? And when i do this, how do i bypass the o2 sensors or what not?
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thanks, since you are in germany you may not be able to get the pcm update so id try it without doing anything to the o2s and see if you get a CEL, if you do try the defouler first
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and i bet you like how big a BL truck looks when a 3'9'' midget has to jump in!
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What you really ought to do is just turn off the rear 02s with a tune.
(your PCM needs the front ones to run the engine at the proper a/f ratio) Also, If you replace the stock muffler I'd go with a quieter one. Something like a flow 50 series. Rich |
Originally Posted by wydopnthrtl
(Post 1491576)
What you really ought to do is just turn off the rear 02s with a tune.
(your PCM needs the front ones to run the engine at the proper a/f ratio) Also, If you replace the stock muffler I'd go with a quieter one. Something like a flow 50 series. Rich ranger + no cats+ loud muffler = fail |
i have a gibson muffler right now.. so could a guy tune the computer to run properly without either of the O2 sensors?
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Originally Posted by Toreador4x4
(Post 1491385)
and i bet you like how big a BL truck looks when a 3'9'' midget has to jump in!
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Originally Posted by God,Country,FORD
(Post 1491891)
i have a gibson muffler right now.. so could a guy tune the computer to run properly without either of the O2 sensors?
Why would you want to eliminate this? |
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