Update:
Pulled MAF plug and runs just as poorly
Check engine light isn't burned out. Lights on key on.
Still not lit when running but pulled codes and have rear O2 code we've had forever

Will recheck IC hose connections. Wondering about the CAT.....

RussB - no codes showing with generic code reader. will check again a I haven't pulled in a while
RigsPGT - new Bosch MAF. I'll uplug and see how it runs.

Hello,
Our '99 R was exhibiting signs of the ETM failing. Ran great and then would spontaneously cut out and then back in again with different throttle position. Sent unit to Xemodex for rebuild. Upon reinstallation, the car ran great for about 7 miles and then similar symptoms returned except now ...