E30 S50 no start - no spark/no fuel

[e30austin]

Customer's 1991 318i sedan with 1995 S50B30 US engine has a no start condition after swapping in engine. Harness is from the same manual '95 M3. 413 red label DME with TRM tune. Modified C101 plug (by me). All sensors are brand new.

Car cranks, no spark. I do not hear the ICV hum or the fuel pump turn on.

So far, I have double checked the following:

-engine arm/frame rail ground, coil pack/valve cover ground, engine harness/battery tray ground, injector/VANOS ground, and DME ground into the bracket.
-CPS tests out at a good 540 ohms
-swapped 413 red label DME and all relays from my running/driving S50 swapped car
-good 12.5 volt connection at the battery tray

I have double checked all my C101 connections, and here they are:

318i C101 Pin Color Function E36 X20 Pin Color

1. blu (alternator) 25. blu
4. brn/wht (CTS) 12. brn/vio
5. brn/grn (oil pressure) 23. (blk/gry)
7. grn (ign switch) 21. grn
8. wht (fuel rate) 24. wht/blk
9. blk (engine speed) 20. blk
11. wht/blu (SI reset) 19. wht/grn
12. brn (CEL) 8. gry
13. grn/vio (fuel pump) 13. grn/vio
14. blk/wht (vehicle speed) 14. blk/wht
15. blk/grn (unloader relay/starter) 15. blk/grn
16. wht/blk (DME diag conn) 17. wht/vio
18. blk/yel (ign switch) 18. blk/yel
20. red/yel (ABS) splice switch from e36 main relay

The wiring seems correct to me, but I'm kind of at a loss. All help appreciated. I'd just like this car to leave my shop soon.

Edit: I have also confirmed proper placement of the trigger wheel, and it is lined up properly with the keyhole. FYI

[Batz]

I had a very similar problem with my e30. I had no spark and no fuel. But the car would crank. My issue was the bad OBC, for some reason the anti-theft system turned on, and wouldn't let the car start. When i disconnected the OBC the car started right away. I'm not sure if that will help you with the car in any way, as mine is just stock e30 with stock m20 in it, but figured might post it anyway.

[e30austin]

Thanks, but this car doesn't have an OBC.

[e30austin]

Bump.

[e30austin]

Anyone?

[justin_l_]

Just quickly took a peek on lunch, double check 20 on the e30 side. Looks as if it is supposed to go to the ABS, not coolant temp.

http://wedophones.com/Manuals/BMW/1991%20BMW%20318i%20-%20318is%20-%20318ic%20Electrical%20Troubleshooting%20Manual.pdf

Page 23

[e30austin]

Thanks, Justin. I revised my wiring. Here it is:

318i C101 Pin Color Function E36 X20 Pin Color

1. blu (alternator) 25. blu
4. brn/wht (CTS) 12. brn/vio
5. brn/grn (oil pressure) 23. (blk/gry)
7. grn (ign switch) 21. grn
8. wht (fuel rate) 24. wht/blk
9. blk (engine speed) 20. blk
11. wht/blu (SI reset) 19. wht/grn
12. brn (CEL) 8. gry
13. grn/vio (fuel pump) 13. grn/vio
14. blk/wht (vehicle speed) 14. blk/wht
15. blk/grn (unloader relay/starter) 15. blk/grn
16. wht/blk (DME diag conn) 17. wht/vio
18. blk/yel (ign switch) 18. blk/yel
20. red/yel (ABS) splice switch from e36 main relay

[luckysnafu]

You've got a couple problems with your C101 wiring, but I don't think that should prevent the car from starting.

C101
Pin 4 - This needs to be wired to an e30 temp sensor (brown top, one wire) to get the temp in the e30 cluster
Pin 14 - Speed Input Signal - Not sure what this connects to on an S50 (pin 9 on M52/S52)
Pin 20 - ABS Unit - Should be connected to a switched +12, preferably from a relay (I have mine hooked up to the main relay)

The 318i/is didn't have any wiring for oil level, so you don't have to worry about that, unless you are swapping in a check panel.

[e30austin]

Up

[justin_l_]

Power and grounds good? Cut back the covering to double check?

[Nick_S]

My CPS tested well within spec but the car wouldn't start. Replaced it with a brand new one and it fired right up....but you're saying the sensors are all new so I doubt this would be your problem. Tried a different DME? Double check your grounds?

[e30austin]

Yup, done all this. Swapped DME and various relays from my car to no avail.

The car has some bullshit alarm system in it. The unloader relays are all turning on, but I wonder if that alarm is doing something funny and causing it not to start (since it taps into the ignition switch...)

[Slovik]

Maybe something simple like a main relay?

[delamaize]

Time to rip and tear out that stupid alarm, and kill it with fire.

[Ekisto]

Did it start? im in the same place as you. Everything seems to be conected correctly.