BMW m50 wont start

[hsa101]

We have a 1992 bmw 525i (m50 non vanos motor) in the shop that we have built. We had the car running on the factory ecu before we began installing this one. We are using an e36 plug/play ecu to run our non vanos motor. 

All the pins have been moved around to the correct spot.

Trigger 1 vr crankshaft
Trigger 2 VR camshaft (we used the original m50nv camshaft sensor, it is a vr, the e36 is a hall effect)

All 6 injectors tested ok
All 6 coils tested ok
Coolant temp ok
IAT sensor ok

Cranking RPM is 200 rpm in the link ecu
Trigger 1 and Trigger 2 show NO error

I have tried using 84, 276, -84, -276 as a trigger offset for trying to get this to fire up.

I have had someback fires and "almost" starts.

Need help on what settings to use for the trigger.

Thanks.

Please keep in mind this is obdI e34 m50 non vanos motor. The crankshaft pulley that is on the motor, is still an original one.

[Adamw]

Have you put a timing light on it and done the trigger cal?

[Nettlez]

You will need to wire some igniters in, standard Ecu has them built in, your effectively getting a weak spark. Your ignition timing should be -84 degrees providing your crank sensor wiring polarity is correct, if it's not then it will run on 276 but you will end up with trigger and rpm errors. Will put some links up to the igniters and plugs I used 

[Nettlez]

Hi, as per the message I sent you

I'm afraid  if you are using the m50 coils you will definitely need external ignitors. I went through all this my self a few months ago. If you look on the link below at the bottom it lists the ignitors as an extra, doesn't say there built in.

http://dealers.linkecu.com/E36Plus

 You will need two of these

http://www.ebay.co.uk/itm/390972683826?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

and again two of these

http://www.ebay.co.uk/itm/111088132647?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

and to wire them like this

http://www.bosch-motorsport.com/media/catalog_resources/Ignition_Module_IM_32_Datasheet_51_en_2778309387pdf.pdf

It would be a good idea to post a scope of your tirggers and what map you are using too. And as Adanw says ignition timing will need to be checked with a timing light, I brought this one and it worked a treat

http://www.ebay.co.uk/itm/110711496588?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Hope this helps

[Nettlez]

He's got it running now with -84. His Ecu had the igniters built it FYI 

[golf-2]

For the stock non vanos cam sync, what is the right setup for Trig-2 edge and sync mode??

thanks

[Nettlez]

For the stock non vanos cam sync, what is the right setup for Trig-2 edge and sync mode??

thanks

sync mode I had got set it cam pulse 1x

[golf-2]

I have problem with the m50 engine

good stable crank sensor reading , but when enable the cam , the rpm go random erratic

using stock non vanos vr cam sensor , setup is reluctor , cam pulse x1

any idea?? 

[Nettlez]

Trigger two polarity looks to be wrong, try swapping the wires 

Also is this a non vanos engine? 

[Adamw]

Definitely trigger two wired back to front.

[golf-2]

Trigger two polarity looks to be wrong, try swapping the wires 

Also is this a non vanos engine? 

non vanos head

thanx

[Nettlez]

are you using the vanos crank wheel then? Your cam pulse doesn't line up with you missing tooth gap on the crank wheel like mine does, thinking you might have the wrong crank wheel on? Have you zeroed in your ignition timing using a timing light?

[Steve]

They shouldnt really happen at the same time. Might confuse the ecu

[golf-2]

i use vanos bottom end with the stock vanos crank wheel, yes i notice there r gap with the nv cam sync

i swapped the cam wires, it read well, i use -325 calibrate, but i have feeling the car advances more than the table

i have timing light but i don't know where is the timing mark in the m50s engines

thanx for support

[Nettlez]

Timing marks can be found here

 

http://www.msextra.com/forums/viewtopic.php?f=101&t=34345

 

i lined it up then made marks on the sump and wheel so you can check it with a timing light

[Hussain-vtec]

swap you pulley put m5o vainos crankshaft pulley & swap your engine harness wiring m50 vainos as well.