Hello- have a 96 C36 (M104.941) that basically started losing power and stalling randomly, and when it stalls I can fire it back up and it will run, then stall again sometimes. Totally erratic sometimes it's ok for a few minutes hot, sometimes just dies. It will fire back up and sometimes run for a minute, sometimes just immediately die.

When the problem surfaces the car lurches forward, idle will hunt, then lose power and just stall.

Tach doesn't SEEM to lose signal, if it cuts out it's as if I lifted the accelerator and took my foot off the gas. As I coasted I noticed the RPM's were still registering on the tach,

car has exactly 150K miles, just completed a 3kmile road trip on brand new

-bosch OEM plugs

-coil boots

-new front 02 sensor

- brand new KAE OVP relay (I read the posts, could they really be THAT bad out of the box)

- new Fuel pump relay (switched it out since I got free shipping by ordering it and it was cheap)

- NO CODES AT ALL, no funny lights, nothing.

the problem surfaced last week, did searching and determined the OVP relay must be the problem, henceforth the replacement.

Car ran flawlessly for about 50 miles after the OVP / fuel relay swap so I thought I got it then it came back.

I've had a bad MAF and it caused the car to surge and hiccup but never die, could a crankshaft position sensor cause these issues? It will fire up immediately after stalling, sometimes running for a minute, sometimes not?

Please help.

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03 540I (GAK!!)
81 280E (W123)
70 LeMans Sport with pissed off Poncho 462"
1989 Silverado Step Side (under the knife- complete restomod)