1987 BMW 325 No ignition spark

JSK56

MEMBER
1987 BMW 325

Electrical problem
1987 BMW 325 6 cyl Two Wheel Drive Manual

Car was being driven at highway speed, slowed to exit, about halfway down the ramp the engine quit just like the key was turned off. Coasted into gas station parking lot, check for spark - none. Engine cranks fine - sounds fine, not like a timing belt broken - but no spark. I am a mechanic but have no experience with BMW. Car belongs to a relative, just trying to help them out. If you could give me a place to start, I would appreciate it. Thank you.
Jeff

4 Replies

DOCHAGERTY

MECHANIC
9,601 POSTS

The lack of spark could be several things and to help me out could you repost with the last 7 characters of the vehicle identification number please?

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Tuesday, December 16th, 2008 AT 10:49 AM

JSK56

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6 POSTS

Thank you for your response. The last 7 digits of the VIN are : 8831325. Thank you again.

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Tuesday, December 16th, 2008 AT 3:46 PM

FREEBIRDREBIRTH

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3 POSTS

I think it could be the crank sensor(rpm sensor), if its a 2.7 then its on the transmission bell housing along with the cylinder identification sensor. If its a 2.5 then its in the front by the crankshaft pulley and both rpm and cylinder identification sensors are in one. Check for physical damage to the sensors or if you can for output signals at the connector wich is near the intake manifold, using a multimeter or wave scanner. Also dont forget to check for voltage to the coil positive side if you have a led test light then you can also check for the grounding signal from the ecm at the negative side. Also make sure that the spark isnt present at the coil to dist. Wire to eliminate the chance of cap and rotor ect.

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Sunday, January 18th, 2009 AT 12:41 AM

JSK56