Need help! Dme relay buzzing,no spark or fuel (m50) need expert!

[DtfwithE30s]

Hey guys I'm in the middle of doing an m50 vanos swap in my e30...let me try to make this short and simple..
1: I have ZERO chassis wiring in my e30...nada! All wiring gone
2: drivetrain is from a 3/94 325is (motor,ecu,etc)

I got everything into the e30 to the point where itl turn over, but my dme relay is buzzing right when I turn the acc power on, also my dme isn't sending a signal to turn my fuel pump on. So I ran my own wires to turn my pump on, then I tried starting it and it sounded like it had no spark...so I checked for spark and I get nothing...what am I missing?

[DtfwithE30s]

And my dme relay is good, I checked it and it works just fine

[Poeman446]

Check power coming to the fuel pump and ECU relays.

[DtfwithE30s]

I already grounded the fuel pump and I have the power wire coming from the pump straight to the ecu (because the fuel pump relay is in the engine harness and the ecu powers the pump..correct me if I'm wrong) the dme isn't sending that signal to the fuel pump, the dme relay is getting power, (too much) I disconnected one of two of the bigger red wires going to the dme relay and then itl function properly, but I still won't be getting fuel or spark...and what do I do with the red wire I disconnected from the dme relay?

[DtfwithE30s]

Can someone please specify which pinnouts I need to have the motor running? I have the obvious ones but is their anything specific I'm missing? And also I'm putting the e36 cluster in my e30, but nothing is hooked up to the cluster at the moment...will that make the engine not run? The reason why I ask that is because does the dme need a signal from the cluster to power the motor up?

[328ijunkie]

Pin7 on c101 (21 x20) is technically the only wire you need
To tell the ecu it's time to run, other than the power/ground wires
For
The harness.

[DtfwithE30s]

Ok I figured out the buzzing noise, I replaced my dme, now I'm not getting fuel or spark, on pin 7...does that big green wire need to see a ground? Or positive?

[e30rapidic]

large wire from pin 7 hooks to pin 21 on the M50

[DtfwithE30s]

I have no wiring in my e30 as I said earlier so I'm not using the e30 connector, I have the full e36 connector in my car and I need to power this bitch up, I'm not getting fuel or spark, I'm going to check my crank positioning sensor right now

[techno550]

Pin 7 on the X20? That is EWS. Leave it disconnected/floating. Remove that wire/pin if needed.
more info on EWS:

http://www.trmtuning.com/?p=2463

[328ijunkie]

Pin 7 on c101.
Pin 7 on x20 is infact ews,

[DtfwithE30s]

Pin 7 on the X20? That is EWS. Leave it disconnected/floating. Remove that wire/pin if needed.
more info on EWS:
http://www.trmtuning.com/?p=2463

yea right now pin 7 is just hanging there

[wakdog]

Is your DME grounded? I was getting a buzzing relay when i was setting my car up and it wouldnt start, I them moved the DME and rested it against the ground on the strut tower and it all worked.

[dedion]

Hey guys, I've got almost same problem ... in my M50B25 NV swap i have no ground signal to my fuel relay ... when i switch it on by grounding my fp relay (brown/green wire) it goes .. but when I tried to crank it my injectors are not opening and i haven't got spark ... so i checked all grounds, realays, fuses and everything is fine. Can someone please check my X20 to C101 plug connection -

1(Blue/white) - 2(Green/yellow)
2(Blue/yellow) - 10(Blue)
3(Red/white) - 20(Red/yellow)
4(Black/Blue) - non connected
5(Black/white/yellow) - non connected
6(Green/violet) - non conected
7(Black/violet) - non conected (it leads to pin 81 in dme connector x6000 ... what is it ? )
8(Grey) - 12(Grey)
9(Green/blue) - non connected (goes to pin 60 in dme)
10(Brown/black) - non connected (goes to pin 65 in dme)
11(Brown) - non connected
12(Brown/violet) - 4(Brown/violet)
13(Green/violet) - 13(Green/violet)
14(Brown/red) - 14(Black/white)
15(Black/green) - 15(Black/green)
16(White/yellow) - non connected
17(White/violet) - 16(White/black)
18(Black/yellow) - 18(Black/yellow)
19(White/green) - 11(White/green)
20(Black) - 9(Black)
21(Green) - 7(Green) - there was 2 wires - one smaller and one bigger, I soldered them together
22(Green/white) - 6(Green/white)
23(Brown/green) - 5(Brown/green)
24(White/black) - 8(White/black)
25(Black) - 1(Black)

I also checked my crank sensor via dme pin 16 and 43 and i've got 520ohms
On my pin 26 there is 12V+ like on pin 54 and 56
And i've got ground on pins 55, 6 and 34
My main relay is just working fine.

And something about my setup .. Euro E30 sedan M20B20 7/1990 with OBC (couldn't it be code function ?) ... engine M50B25 NV 1991 came off E34 touring, dme 402.

I hope someone help me :)
Thank you guys and sorry for my english :(

[dedion]

no one ? :(