New Owner needs help restoring E30

[mrgraphics]

Hello - I've now owned my 1986 325es for a little under a month. I've fixed almost everything that was wrong with it, except I have one nagging problem. Hopefully someone here can point me in the right direction to get this girl back on the road.

Car will start and run fine every time when cold, but as soon as it hits operating temperature (temp needle about half way) it stalls and won't start until it is cold again. There is no fan fare, it just stops abruptly.

What I've done so far:

Replaced fuel pump and filter
Replaced ECU
Replaced coolant temp sensor
Replaced coil
Replaced relays
Replaced fuses
Replaced spark plugs

Diagnostics when it stalls out and won't start:
Verified I still have fuel pressure
Verified that I still have 12V+ going to the coil on key ignition

Any ideas? Thanks in advance.

[AndrewBird]

Possibly a bad cold start valve sticking open? #7 seen here:

http://www.realoem.com/bmw/showparts.do?model=1254&mospid=47308&btnr=11_0859&hg=11&fg=40

Try unplugging it when warm and see if it runs.

[mikeedler]

fuel pump? the motor part of the pump might be overheating and then stopping. I had a E21 that did that too.

[AirplaneBuilder]

simple, get a 24v

oh and welcome to R3V!

[mrgraphics]

NitroRustlerDriver, I tried that before but after it had already died. Once it dies it won't start. I'll try it again running and see if it still dies.

mikeedler, I've already replaced the fuel pump. Plus when it dies, I still have plenty of fuel.

AirplaneBuilder, what's a 24v? I'm somewhat mechanical, but by no means a mechanic.

[blunttech]

test Crank position sensor

[Roysneon]

W24v is a 24 valve DOHC engine found in E36s, E46, etc. It is a popular swap to perform on E30s for a more modern, powerful powerplant.

I don't think that's really what you are looking for, however. Welcome to r3vlimited and good luck with the diagnostics.

[mrgraphics]

Would the crank position sensor stall the engine when it's already running? I could see how it would stop it from starting.

[blunttech]

Would the crank position sensor stall the engine when it's already running? I could see how it would stop it from starting.

Yes it would

[mrgraphics]

OK - I'll give it a shot. I've read where even if the ohms test ok, the sensor may be going bad. So I'll have to swing by the Pick-n-Pull.

Any e30 crankshaft position sensor will work right? Mine has two since it's an es, so do I scavenge two sensors from two different cars?

[blunttech]

Edit note I's are diff

they are both the same so you need 2 if you are replacing both
from 9/85 12 14 1 710 668
find these on
325e
528e
M5
thru 8/85 12 14 1 708 618
find these on
325e
528e thru 11/86

OK - I'll give it a shot. I've read where even if the ohms test ok, the sensor may be going bad. So I'll have to swing by the Pick-n-Pull.

Any e30 crankshaft position sensor will work right? Mine has two since it's an es, so do I scavenge two sensors from two different cars?

[mrgraphics]

I don't mean to be dense, but I cannot for the life of me locate the sensors. I just can't see them, and the bentley's black and white pictures are so poor that the image makes no sense to me.

[bernzpeed]

welcome!

[blunttech]

I don't mean to be dense, but I cannot for the life of me locate the sensors. I just can't see them, and the bentley's black and white pictures are so poor that the image makes no sense to me.

they are on the bell housing.. 2 right next to each other.. Jack the car up and get under there.. Youll see them

[lurenz]

I would say fuel pump relay or key ignition troubles, but I see you already checked on...