Help please

[Farrington229]

Ok. I (and no one so far) cannot figure this out.

My [COLOR=blue ! important][COLOR=blue ! important]car[/COLOR][/COLOR] (1985 325e) had been running great. I washed it one day and it worked later that day but the next day it wouldn't fire. The engine will turn over but there was no spark. It's been like that and we replaced the coil (which get's power) and the new one still wouldn't spark. i checked the RPM and crank sensors, changed the air filter and made sure it was set up correctly. one day i disconnected the [COLOR=blue ! important][COLOR=blue ! important]battery[/COLOR][/COLOR] and when i reconnected it, it started up fine. i turned it off and tried again and it was fine so i went to bed that night happy and in the morning i tried again and nothing. I've had 4 different (non mechanic) people look at it and the only idea we can possibly come up with is that there's something wrong with the ecu. can ANYONE please please PLEASE help? any input is helpful.
Thanks all.

The battery was recently replaced so it should work fine. something seems to be grounding out the battery while it is connected though so something inside might be shorting it out.

[ethree]

Crank position sensor?

[Philo]

He all ready said he checked it. I would get a multimeter, a bentley manual and make a day out of it.

It's too late for me to take stabs in the dark. Don't fret though, Jlevie should come around sometime. He's always on the no starts.

[jlevie]

No spark when cranking the engine is going to be:

No timing reference data to the DME
No power to the DME (or no Start signal)
No power to the coil
Wiring fault between the DME and coil
Bad coil
Bad DME

That does assume that you are checking for spark at the coil output lead. If checking at a plug you can add ignition wires, distributor, rotor, and timing belt to the list of suspects.

[Farrington229]

i'll check all of that. thank you for the replies :pimp: