Post-start idle is Lean..

[92hb_hb]

Here's my delima.

When I start my car up in the morning, my idle AFR's are normal 13-14's.

But if I shut off my car and go back and start it again, say 10-30 minutes later, the idle AFR's tend to read really lean, around 16-17.5 AFR..

I compared my fuel componsation paramaters on the current skl file to others, and it seems like my Open Loop - Low engine Load corrections %'s are much lower as compared to the other skl files , ie. the stock USp72.skl file.

My current water temp compensation settings are as follows:

-40 | -24 | 7 | 32 | 67 | 106 | 168 | 177 | 302 F

39.8 | 39.8 | 29.7 | 9.4 | 4.7 | 4.7 | 2.3 | 0 | 0 %

The other skl files typically show these numbers:

-40 | -24 | 7 | 32 | 67 | 106 | 168 | 177 | 302 F

39.8 | 39.8 | 29.7 | 25 | 20.3 | 15.6 | 7.8 | 0 | 0 %

question is, are my compensation %'s a little low and thus causing me to idle lean when i let the car sit and come back to restart the car.

thanks..

[Spunkster]

can you post datalogs and calibrations showing the AF?

[Gigi]

Hello,

I have also this problem. Everything is good in the cold start AFR in the 12s/13s then warmed up after hours of tunning, it's in the way around 14.7 wenn cruising but wenn I stop the car (warmed up) then direct after re-start, the AFR at idle goes from 13s to say 16.1.... then wenn I cruise again there is no problem. I try to fix it with playing post start trim since monday but no good results. I m runing open loop.

Here is a datalog from this kind of problem but this datalag is not so bad but I ve recorded more bad lean with the same calibration...

Thanks a lot