I just got a 92 740i 129,000mi.
It runs choppy at all rpms and temps.
cold start,smooth 1 second then dies,cankeep it running by working the throtle.
unplug AMM and it runs fat but verry smooth and powerfull.
before I buy a new AMM, could anyone offer any advice?
code 113 121 322 and the right 2 pins on the AMM read 0 ohms.

 

If you unplug the mass flow sensor and it runs good chances are the AMM is bad.

 

Thanks for the tip. I'll repost the outcome.

 

wating for new AMM , I see that the flame trap vacume to manifold is plugged with a bolt.
TB is oily as is large tube from flame trap.
any ideas why the last mechanic? did this and what problems it would cause?

 

Clean everything out and make sure all is connected.
No idea why they did it beside they didn't know what they were doing.

 

I just replaced AMM ( rebuild from AutoZone @ $168.00/exchange )
and the brick runs like new.
reset the codes , test drive , and no fault codes.
thanks again and I'll be hooking up the pvc vac hose. (it seems an aftermarket
cruise control needed manifold vac and now uses the pvc nipple) I will
use a T or install another nipple.

 

Good Im glad it is running great now.