CEL and Short Term Fuel Trims

[Steve 986]

BLUE 62 Thank you for the response. I will check for leaks in the exhaust ahead of the front O2 sensors, we have not done that as far as I know.

I agree, Long terms seem low but as I said as soon as it comes of idle the Short terms go to nearly nothing. Had one Porsche friend/Inde suggest the spark plug tubes.We did replace the seals on the tubes when we had the engine out for the Cam chain rails but did not replace the tubes themselves. A cracked one could be the culprit? Smoke didn't show anything there. They are easy enough to change and inexpensive but that seems like a long shot. Ever seen that?

Thanks again for the exhaust suggestion I will check it out and report back.