Need help diag minor issue S52 swap

[stormspike]

I have a small issue with the swap. She runs great, starts great, etc, but there is an issue when I start the car after it has sat for a while (cold-6+hrs).
1. fires up with not issue and idles great.
2. When I put the car in 1st and let up on clutch slowly, runs fine.
3. Only issue is when I apply gas, wants to bog down. If I give it a couple of quick gas then it runs fine and goes.
4. If I let it idle for a minute or so, no issues. Starts and runs great.
5. After the few pumps with gas, she runs great all day.

This seems to be only an issue when I start in the AM. Fires up quickly and runs great until I apply gas. After 2 rev ups, it seems to be fine. Is there a sensor that would cause this?

thanks,

[etxxz]

too low rpm's maybe. vac leak. my car does the same under 700rpm. above that, there's no stopping it.

[loonibab325i]

also check and make sure your ecu is boltd up correct, mine would do a similar thing and loose ground everytime i'd turn or shift hard..