LS2 randomly commanding 15.5 AFR at idle

[ShoddyHog]

I found that my car is randomly commanding 15.5 AFR. I've downloaded and installed version 2.22.3128.16242 and have the post O2 test disabled.

In the log, the anomalies start at frames 5062, 18812, and 24373.

Any idea why? Disable the cat test too? I have Kook's high flow cats installed.

Gerry

[Bill@HPTuners]

Have you tried disabling the cat test to see if that does the trick?

[ShoddyHog]

Have you tried disabling the cat test to see if that does the trick?

No, because I have cats installed and didn't know if that'd be a good thing to do or not.

I'll disable it and give it a shot.

Gerry

[flea]

Bill is correct, disabling the master catalyst test should do the trick. I had the same problem after installing Kooks LTs.

[ShoddyHog]

Thanks guys. I ran one log yesterday, and it did not do it again. I'll know for sure tomorrow when I drive home from work.

Gerry

[ShoddyHog]

That did do the trick.

Now, the question is are there any drawbacks to not having that test enabled?

Gerry

[ct06gto]

That did do the trick.

Now, the question is are there any drawbacks to not having that test enabled?

Gerry

Bringing back from the dead.

What affect does having the general catalyst test disabled on a obd2 emmisions test?

[Bill@HPTuners]

Bringing back from the dead.

What affect does having the general catalyst test disabled on a obd2 emmisions test?

No idea