Post Cat O2 sensors?

[SVTHorsnake]

Does anybody know how to make the postcat o2 sensors read clean on a 997TT without a retune? Does anyone make MIL eliminators for these cars?

[Camus997]

Does anybody know how to make the postcat o2 sensors read clean on a 997TT without a retune? Does anyone make MIL eliminators for these cars?

If you've changed the exhaust system you can get CEL's. O2 (bung) extensions are commonly used for this and almost always fix the problem without going to an ECU flash.

[SVTHorsnake]

Does anybody know how to make the postcat o2 sensors read clean on a 997TT without a retune? Does anyone make MIL eliminators for these cars?

If you've changed the exhaust system you can get CEL's. O2 (bung) extensions are commonly used for this and almost always fix the problem without going to an ECU flash.

thanks for the reply. Does the ECU's perameters have a limit on the lean side or does it only trip a light from the rich side? I guess the question would be, can I simply over extend the bung by about 2" to 3" or is there a "sweet spot"?

Edited October 1, 2008 by SVTHorsnake

[Camus997]

Does anybody know how to make the postcat o2 sensors read clean on a 997TT without a retune? Does anyone make MIL eliminators for these cars?

If you've changed the exhaust system you can get CEL's. O2 (bung) extensions are commonly used for this and almost always fix the problem without going to an ECU flash.

thanks for the reply. Does the ECU's perameters have a limit on the lean side or does it only trip a light from the rich side? I guess the question would be, can I simply over extend the bung by about 2" to 3" or is there a "sweet spot"?

I wouldn't want to guess here, best to check with your reputable tuner and I'm sure you'll be satisfied. If the extension doesn't work you may be looking at a faulty O2 sensor(s). The claim that after market products (and I don't mean to slam anyone here) are always problem/error free is not the case. However, there are many excellent products (you tend to get what you pay for with Porsche) but we consumers need to be aware of gliches that can arise.

Good luck.