isfvss

Is there a way you can Permanently getting rid of the CEL on the ISF, had an Xforce cat back 600kms ago and twice had to reset the ECU( without going to a dealer ) would O2 extenders work in the rear O2,s any help appreciated.

jspecvtec

iTrader: (4)

Deleting secondary cats with catback exhaust should not cause CEL. Maybe it got damaged during the install?

isfvss

The car runs fine even with the CEL light on ?? Never had the CEL before Xforce in 5000km,s

jspecvtec

iTrader: (4)

You can get o2 simulators from rr racing but you shouldn't be getting cel with just catback. May need to check or scan car to see what's going on if it isn't o2

isfvss

Going by RR racing the O2 sims are what you need to prevent the Cel coming up when you delete the second cat, eg Xforce system, just looking for an easy fix if possible.

jat0223

iTrader: (1)

The O2 sims are to prevent a cel when deleting the primary cats, not the secondary cats. As several people have mentioned, deleting the secondary cats shouldn't cause a cel unless the O2s were damaged during the installation.

The first thing you should do is scan the codes to see what the problem is. If it is indeed 02 related, your installer most likely damaged one or both O2 sensors, easy fix.

Joker4096

iTrader: (2)

Or you have an exhaust leak between the headers and mid pipe.

Lmood

iTrader: (3)

I get a CEL from my borla that is intermittent. I also have/ had a leak between the manifold and mid pipe. I replaced the gasket and torqued the bolts to spec. The light hasn't been on in a few days now.

isfvss

Using our 02 conditioner, you can keep your check engine light (CEL) from activating. The 02 simulator may also be used with high flow secondary catalytic converters. High flow secondary cats keep your exhaust from smelling, but they will trigger a CEL because they are not as efficient (or restrictive) as factory catalytic converters. Our 02 conditioner is a dual channel model, and works with both secondary 02 sensors. Full wiring and adjustment instructions included. This has to be right I hope, this is from RR Racing site.

j3ff

I understand what you've quoted there but like others have said, deleting secondary cats won't cause a CEL. Speaking from front to back, it's headers, o2 sensor, then secondary cats.. Your sensor wouldn't even know if you removed the secondary cat's. You either have an exhaust leak or when you reinstalled the o2 sensors you twisted the wires too many times or they've fouled.

Lots of us have secondary cat delete with no cel. Hope this helps.

ISF5L

I had the exact same issue after installing my Xforce Varex cat back. Happened about 3 times, usually once a month after disconnecting the battery to clear it (not the right solution i know but convenient for me at the time).

Anyway, after having my car tuned, it hasnt come back in about 5 months. So good excuse to get a tune :-)

jat0223

iTrader: (1)

I belive this statement is in reference to having after market headers already in place (no primary cats) and running after market high flow cats on your exhaust. When you get headers, the exhaust fumes bother some people so they get high flow cats welded to their exhaust. This mitigates the smell but not the Cel. Therefore, you still need a simulator.

flowrider

iTrader: (9)

To me it's sort of clear that the second set of sensors got damaged when removed from the stock exhaust system and replaced into the new system. The OP needs to read the code and replace either one or both sensors. Also, with a CEL, first gear will be unavailable. You make think the card "runs fine" but it's running in limp mode.

Lou

isfvss

If the O2,s were damaged wouldn't the CEL be on all the time ?? I did 350km,s before the light came on after the Xforce was fitted I cleared it,and them 300kms and cleared it again just wonder why a sensor would do this??

jspecvtec

iTrader: (4)

It takes awhile to register again after ecu is cleared. Probably was damaged or not reading correctly hence the cel because u should have cel on secondary cats