M50 Wont Fire.. At All

[Cyrix2k]

Yes I have used a multimeter. I thought BMW's only supply spark if the DME sees a reading from the CPS.

Its not related to an E30, so whats the problem?

no ECU will. It needs to know the crank position to know when to fire the spark plugs.

[dashboardmonkey]

low compression could be due to cylinder wash

[brianao34]

Kind of a rare but common thing, but I've been reading a lot lately so I could figure out why my S50 wasn't starting and I saw quite a few posts about the keyway for the harmonic balancer shearing off and spinning the harmonic balancer just enough to screw up the timing being as the CPS controls the ignition timing.

[5Toes]

Okay, I will look into all this. Injectors are firing, pulled fuel rail and cranked it to see that. I can only see like 3 of them, need a helper to see the rest.

As far as everything else goes, well battery is near dead so I put it on the charger for now.

Can somebody maybe make me a list?

So far I have:

- check rest of injectors
- electronically test TPS

[5Toes]

http://forums.bimmerforums.com/forum/showthread.php?t=1722917

this thread has me worried because maybe I did fry my DME. Although I never did disconnect that ground wire near the thermostat

EDIT: Checked connection for this wire, all good

[emmanuel.dlc]

but you didn't see any of them dripping anyways? they keep dripping for a couple of seconds until the pressure is released.

on my case, it was a mix of a complete open injector and fouled sparks, it died quick and never turn on again until i dropped new sparks and the bad injector.

[5Toes]

Spark plugs are new and still spark. My helper told me the spark was very strong

[5Toes]

E36 Sensors

Located this document so I will test them all today.

[James Crivellone]

Compression test the damn thing

[5Toes]

Located compression tester, I am going to have to add oil... I know the cylinders are bone dry

[5Toes]

I should also add that before I took everything apart it would run if throttle was kept open... but very, very roughly and backfiring excessively.

[DrJosh]

Is it in park

[5Toes]

yes, otherwise it wont crank.
weather is too bad to compression test

[5Toes]

Problem solved.

Charged battery and undud terminals for 14 hours.

Cranked it with throttle half way open and it slowly started to fire every cylinder and fired up.

Smoked for a good awhile but then drove it around and it is perfect now

Thanks guys :)