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E34 (1989 - 1995)

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Old 11-27-2005, 06:18 PM
tenelson7 tenelson7 is offline
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Location: everett wa
Join Date: Nov 2005
Posts: 1
Mein Auto: 87 528e
won't start

I have a '87 528e. Died going down the road, it turns over but, no start. replaced ECU and DEM relay. There is spark coming out of the coil but no spark at spark plug. Driving me NUTS anyone have any idea's.
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Old 11-30-2005, 08:37 AM
spraker spraker is offline
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Location: Colorado
Join Date: Nov 2005
Posts: 2
Mein Auto: 525i
Just a real quick thought, have you checked your timing belt? The belt runs the cam shaft and the rotor which in turn controls the spark to the corrisponding cylinder. probally the best way to chek this is to pull the distributor and and have someone crank the engine and watch to see if the rotor turns, or better to turn the engine manually. If you skiped a tooth the cylinder may hit the valves causing much MUCH bigger problems, but if this is the case you would probally have a spark? If it does not turn you probally broke your timing belt.

It would also be wise to check the condition of the cap & rotor, wires and spark plugs, maybe for some reason there is a crack in the plastic and the spark is finding new pathways to the ground other than through the spark plugs.

To check spark remove a spark plug, connect the spark plug to the spark plug wire and then touch the end of the spark plug to the engine head. crank the engine and visually see if there is spark. Note if the spark plug is not grounded it will not spark. Be carefull and do not touch the spark plug while cranking the engine or you may be the ground and it will send the high voltage intended for the spark plug though you.

Hope this helps in trying to narrow the problem

Last edited by spraker; 11-30-2005 at 08:41 AM.
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Old 12-05-2005, 09:00 PM
SharkmanBMW SharkmanBMW is offline
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Location: Montreal
Join Date: Oct 2005
Posts: 239
Mein Auto: '94 540i, '03 330Xi
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