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Old 07-30-2003, 10:23 PM   #1
imprezzed
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Default CEL question

Hey, just wondering...
i have a borla cat back right now and am considering adding a borla header, and random technology cat to the system. Do you think that I will have any CEL's with this setup? I also have an intake and a lightweight pulley if that matters
thanks!
Jason
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Old 08-02-2003, 11:56 PM   #2
imprezzed
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bump,
anybody?
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Old 08-03-2003, 12:20 AM   #3
mprezuhguy
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I don't know. I know my car threw a cat deficiency CEL due to my 5Zigen. I am yet to actually find a hole or something.
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Old 08-03-2003, 01:38 PM   #4
NC2.5RS
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Some high flow cats do throw CELs.
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Old 08-03-2003, 01:39 PM   #5
DJ 9iron
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Why is anyone worried about a CEL from an exhaust system?

If the system was designed for your car, who cares if it throws a CEL?

I have been driving with a CEL for about 3 months now due to my gas gauge not functioning properly. (High level sensor btw)

Remedy, a piece of black electrical tape.

I know, I know, they are a PITA... but I just ignore it...
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Old 08-03-2003, 02:39 PM   #6
mprezuhguy
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No, I would like to know if my car throws a legitimate CEL and as long as it's on for some stupid krap then it can't tell me when something's really wrong.
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Old 08-03-2003, 03:46 PM   #7
DJ 9iron
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It can read more than 1 code.
When I got mine pulled, it read 2 seperate unrelated codes.
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Old 08-03-2003, 04:59 PM   #8
Jard
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Quote:
Originally posted by DJ 9iron
It can read more than 1 code.
When I got mine pulled, it read 2 seperate unrelated codes.
I guess that theory works if you get the car scanned every week or something like that. I think he is saying that you will have no idea you have other problems if you have a constant CEL.

Just for reference. I have a constant CEL right now, stupid rear 02 sensor.
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Old 08-03-2003, 08:51 PM   #9
mprezuhguy
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Yup, thanks for clarifying. That was what I was saying. It will read out lots of different codes, I know it does at least 10. But if it's on all the time, you never know when a new one comes up.
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Old 08-03-2003, 10:15 PM   #10
imprezzed
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that's what I was thinking too, I don't mind having it on, if I knew it was on for the same thing every time, but there would be no way of knowing, unless you cleared the codes every week..
jason
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Old 08-04-2003, 10:56 AM   #11
jeffg
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There are a few companies that sell CEL fixes for the P0420 CEL. It will cost you about $20 and install is pretty easy. Then you wont have to worry about CEL's from the headers and cat.

There has been some success in preventing the P0420 CEL by keeping more heat in the headers. Ceramic coating or header wrap does the job.

J
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Old 08-04-2003, 12:03 PM   #12
NC2.5RS
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www.boxer4racing.com sells the CEL eliminator. Dale's a great guy to work with. He sells them for 20.95 if I remember correctly.
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Old 08-04-2003, 01:35 PM   #13
mprezuhguy
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Well, took mine to the dealer where one of my good friends is a subaru tech, and got the CEL checked and it seems that it was a cat deficiency. He reset it and it hasn't come back on in about 500 miles since then. Hopefully it stays off.
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Old 08-06-2003, 10:37 AM   #14
RChampion
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i have borla headers. The CEL's are just like women, they come and go whenever the hell they want it seems.....

Mine will have days where it will turn on/off/on/off in an afternoon. Sometimes it will stay off for over 1000 miles.

you just stop caring after a while....
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Old 08-06-2003, 01:41 PM   #15
mprezuhguy
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When mine was on, I started to notice a trend. It would turn off when the engine was cold and turn back on again when it warmed up. But after my friend at the dealership reset it now it doesn't turn on at all.
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