Intro
I have searched and tested everything, and cannot find out what is going on with my e30. So here I am making my first forum post in hopes I can get this thing running again. First off it is a 1989 325is, m20b25 engine. and no mods have been done. As the title states. No start, although i have spark.. now, and no fuel. This has been the biggest mystery of all time to me.
The problem
around 4 weeks ago I drove my perfectly running and driving e30 about 2 hours away to drift on some backroads with a friend. after about 45 minutes of sliding, we were idling on a side road the engine cut out. we spent the next few hours pulling and diagnosing everything we could find. eventually we came to the conclusion that I had no spark (yes no spark) and I had fuel. So the obvious answer would be crankshaft position sensor or ignition coil. knowing this, i decided to tow my car back to my house where I have tools and other implements of destruction, to further my investigation. a few days later a new CPS arrived and I installed it, but to no avail it did not start. so then I assumed ignition coil, which i then replaced, but no dice. after reading through hours of forums some say their DME (motronic 1.3 grey label) had failed and ended with similar results. thankfully i found one about 30 minutes away on facebook so i went and picked it up and installed it. Which then allowed my car to fire right up and run, albeit very shitty. after about 5 minutes of idle it would cut out and die. well I figured I would install some new parts while i was at it and refresh some things so i installed new ignition coil cables, new spark plugs, fuel filter and fuel pump as well as main relay and fuel pump relay. after installing all those i went to test out the car and see how it was running but now I don't have fuel. so the roles have reversed. now i have spark and no fuel.
What I have tested
I have tested bridging 87 and 30 on the FP relay but still no start, and no audible pump when cranking. although if I bridge 30 to fuse 11 I audibly hear the pump working as it should (its new after all) I have re installed the old DME to see if i could replicate the no spark, but has fuel. but that didn't work.
Side note when i try to start the car without a jump pack it doesn't crank, new battery and it shows 12.4v so i don't know whats up with that either, but i assume it wouldn't affect my car getting fuel, since it cranks fine with the jump pack.
no voltage at fuse 11.
no voltage at FP
I really don't know what to do now, could it be the DME not sending ground signal? could engine ground affect this? i have replaced the CPS twice with hella cps, but they show around 800ohms of resistance so i assume thats good?
Someone chime and give me an idea. or this things gonna visit the junkyard. lol
Also let me know if this is the right forum... new at this so if i need to move this post to a different sub to get better results lmk
I have searched and tested everything, and cannot find out what is going on with my e30. So here I am making my first forum post in hopes I can get this thing running again. First off it is a 1989 325is, m20b25 engine. and no mods have been done. As the title states. No start, although i have spark.. now, and no fuel. This has been the biggest mystery of all time to me.
The problem
around 4 weeks ago I drove my perfectly running and driving e30 about 2 hours away to drift on some backroads with a friend. after about 45 minutes of sliding, we were idling on a side road the engine cut out. we spent the next few hours pulling and diagnosing everything we could find. eventually we came to the conclusion that I had no spark (yes no spark) and I had fuel. So the obvious answer would be crankshaft position sensor or ignition coil. knowing this, i decided to tow my car back to my house where I have tools and other implements of destruction, to further my investigation. a few days later a new CPS arrived and I installed it, but to no avail it did not start. so then I assumed ignition coil, which i then replaced, but no dice. after reading through hours of forums some say their DME (motronic 1.3 grey label) had failed and ended with similar results. thankfully i found one about 30 minutes away on facebook so i went and picked it up and installed it. Which then allowed my car to fire right up and run, albeit very shitty. after about 5 minutes of idle it would cut out and die. well I figured I would install some new parts while i was at it and refresh some things so i installed new ignition coil cables, new spark plugs, fuel filter and fuel pump as well as main relay and fuel pump relay. after installing all those i went to test out the car and see how it was running but now I don't have fuel. so the roles have reversed. now i have spark and no fuel.
What I have tested
I have tested bridging 87 and 30 on the FP relay but still no start, and no audible pump when cranking. although if I bridge 30 to fuse 11 I audibly hear the pump working as it should (its new after all) I have re installed the old DME to see if i could replicate the no spark, but has fuel. but that didn't work.
Side note when i try to start the car without a jump pack it doesn't crank, new battery and it shows 12.4v so i don't know whats up with that either, but i assume it wouldn't affect my car getting fuel, since it cranks fine with the jump pack.
no voltage at fuse 11.
no voltage at FP
I really don't know what to do now, could it be the DME not sending ground signal? could engine ground affect this? i have replaced the CPS twice with hella cps, but they show around 800ohms of resistance so i assume thats good?
Someone chime and give me an idea. or this things gonna visit the junkyard. lol
Also let me know if this is the right forum... new at this so if i need to move this post to a different sub to get better results lmk
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