rich - accelerator enrichment

[deemo99]

After fixing and re-fixing a couple of boost leaks, the car is running much better. However, I still have an issue with running rich under some circumstances.

When I start the car I get 14.8-15.2 AF for about 10 seconds. After that it goes to 10.4-10.6 and will slowly move back to 11.5-12.0 after the temp gets to about 150F or so. At idle or while driving my accelerator enrichment just bounces from 49% to 99%.

Is there anything besides a boost leak that could be the cause of this? What drives or effects the accelerator enrichment?

Driving the car (which has not been very much) I am a little on the rich side, but randomly, or so it seems, she'll go to 10.6 or so until I let off throttle and get full vac, after light throttle again, back to rich eventually.

Any ideas besides a boost leak? O2's are used, but in good condition, new plugs, wires, etc. I swapped the TB off the 99 but have not adjusted the TPS or anything else, just bolted it up and pressure tested which cured the TB shaft seal leaks at least.

Thanks in advance!