BMW E31 850 NO spark on the left cylinders.

[BMWE28BAHAMABEI]

I bought an E31 which is not running for this moment.
The goal is to get the engine running and the car driving before the end of the year

What I already checked:

-There is fuel at the engine
-The plugs have spark at the right side (driverside) of the engine
-There is no spark at the other side.
I switched the distribution cap, rotor arm, spark plug wires and coil form the side where I had spark to the other side and I still didn't got any spark.
I measure at both sides 12v at the income of the coil.

Are there any sensors, computers, modules... in the car that could affect the proces of getting spark?
Which OBD reader is suitable for the E31?

Thanks for suggestions

[pchotard]

Hi, i got exactly the same issue, in my case, the MOSFET which drive the coil was burned into the corresponding DME. Have a look at https://r.tapatalk.com/shareLink/top...ink_source=app

[Timm]

....But start at the CRANKshaft sensor, that's the more 'common' fault

[shogun]

is there fuel on both sides of the engine? M70 has 2 fuel pumps. Crankshaft position sensor testing http://www.e32-schrauber.de/bmw/s-kw-sensor.htm between PIN 1 and PIN 2 resistance must be 540 +-10% Ohm
and donut testing https://www.bimmerforums.com/forum/s...&highlight=CPS