E36 M50 problem please Help!!!

[shock]

I was wondering if anyone could help me with this problem. I resently purchased a 93 325i. But the engine was swapped out with a 95 E34 M50.
I keep getting an idle bounce 500rpm to 2000rmp.When the rpms go down i hear a sucking sound around intake manifold. I replaced the ICV, Mass flow sensor and O2 sensor and problem hasnt gone away. Also i notice the DME was changed.
It has a silver lable 413 DME with a bevautosport performance chip inside.I looked up the vin# for the DME it says it for an automatic, But my engine is manual. Can that be causing my problem? Another thing i wanted to mention when i shut the car off (Turn the key to off position) It dosnt shut off right away. It takes a like 10sec to shut off.:(

[thedude60126]

Sounds like a ecu problem with the shut off thing. Could be with the idle too. I would defiantly find a chip that matches your car. Does the new motor have vanos in it.

[Bluebimma]

Yes its vanos.

If you have your stock dme, try that out. It doesnt matter the tranny when it comes to engine management, thats why auto-transmission equipped chassis' have an ECM for the transmission.

[shock]

Bav Auto Chip for 413 (BAV.M50.300\1998) Thats whats in the DME.
Bavauto website says for 325i Thru 12/1994 Production mine is a 95.
Can the chip be the issue here?

[m2pc]

Bav Auto Chip for 413 (BAV.M50.3001998) Thats whats in the DME.
Bavauto website says for 325i Thru 12/1994 Production mine is a 95.
Can the chip be the issue here?

Even though your "year" is a 1995, it could be produced in 1994. They don't start making the model year on Jan 1st, since they want to release the model already by that point. They start earlier. Mine's a MY 1997 but the build date was in 5/96.