My father called me the other day and asked if I could come help him fix his car, or at least look at it. He has a 1987 325 5spd 4dr (no other letters/numbers which I believe means e?) with ~275k miles on it.
The other day he started it, and walked down to get the mail, while walking back towards the car it stalled and hasn't started since. He has a 325 manual and asked if I could come over and help him figure it out.
First off, I checked for Spark at the Plug, NO SPARK Next I checked for battery voltage at the Coil Pin 15 (+ side) Good voltage. Checked Primary/Secondary resistance across the coil and everything was pretty close to spec.
Pulled the distributor cap/rotor. It looked pretty old and at first we couldn't get any connection on the Rotor, and there was a hairline crack running down the center of the plastic that held the rotor contact in place. Figured "Bingo", so we ran up to Autozone and picked up a new cap/rotor.
Put everything back together, and NOTHING!
Rechecked everything and all was hooked back up correctly. We checked the fuses again, even testing them with a multimeter just to make 100% sure.
Tried running the coil wire right close to a piece of grounded metal to see if it would spark, but we get nothing there either.
It seems the next piece in the puzzle is the "Motronic Control Module" according to the book, but after doing some searches here, It looks like it could also be the Crank sensor too.
Are either of these easy to test? Where is the Motronic CM located? Are there any "obvious" 1987 BMW things to check before pointing at the Motronic unit?
TIA for any information and/or links you can point me towards in order to get this thing running again.
One more thing:
I The plugs when you pull them out seem DRY of any fuel. So I'm guessing we're not getting Spark or Fuel. I was going to pull the fuel line off the FPR but the stupid band clamp was on so I couldn't get to it. I tried removing the two 10mm bolts holding it to the fuel rail but it didn't want to come off. I figured it was just an o-ring of some sort holding it on, but with nearly 300k miles I didn't want to yank too hard so I don't know 100% that we're not getting fuel, but I'm guessing we aren't by how dry the plug is.