Hey, I think im set on getting a PLX wideband o2 sensor, ive been looking at it for about a week and it just seems to hit all the right spots with me.

If I want to get the RPM and all that stuff going I need to hook the wires up, does anyone know of a wiring diagram for the ecu? Or possibly what wires the TPS, RPM, etc are?

Thanks a bunch

Your best resource is the BMW Electrical Troubleshooting Manuals (ETM). I do not have one hany, sorry, or I'd send the relevent diagrams. Try Koala Motorsport at http://www.koalamotorsport.com.

they dont have it in there, im am sad to say i am very unimpressed with that manual

Pin Circuit Wire Source / Destination
1 Timing Control 2.5 BK Ignition Coil - Terminal 1
2 Closed Throttle Input 0.75 BR/BU TPS - Lower Pin, #1
3 Wide Open Throttle Input0.75 BR/BK TPS - Upper Pin, #3
4 Start Input (50)0.75 BK/YL Ignition Switch, Pin #50
5 Ground 1.5 BR/OR G103
6 AFM Common 0.75 GY/GN AFM - Pin 6 / 4
7 Air Flow Input 0.75 GY/YL AFM - Pin 7 / 2
8 Engine Speed Input 0.5 BK Engine Speed Sensor
9 AFM Reference Output 0.75 GY/WT AFM - Pin 9 / 3
10 Coding Plug Input 0.75 BR/OR Coding Plug, G103
11 Present Fuel Rate Output 0.5 WT Instrument Cluster?
12 0.75 WT/GN Diagnostic Connector - Pin 5
13 Coolant Temperature Sensor0.75 BR/RDCoolant Temp Sensor - Pin 2
14 Fuel Injectors Control 1 & 2 1.5 BR/W Fuel Injectors #1 & #2
15 Fuel Injectors Control 3 & 4 1.5 BR/YL Fuel Injectors #3 & #4
16 Ground 2.5 BR G103
17 Ground 2.5 BR G103
18 Power Input 1.5 RD/BU Main Relay - Pin 87
19 Ground 2.5 BR G103
20 Fuel Pump Relay Control 0.75 BR/GN Fuel Pump Relay - Pin 85
21 Engine Speed Output 0.5 BK C101, Instrument Cluster Tach
22 Air Inlet Temperature 0.75 GY/VI AFM - Pin 22 / 1
23 Shield DME Pin 8, 27
24 Oxygen Sensor Input 1 GN C140, Oxygen Sensor
25 Cylinder ID Sensor Input 0.5 YL Cylinder Identification Sensor
26 Cylinder ID Sensor Input 0.5 BK Cylinder Identification Sensor
27 Engine Speed Input 0.5 YL Engine Speed Sensor
28 Euro 98RON Gas Input?
29 A/C On Input 0.75 BU/WT C107, A/C Compressor Control
30 Barometric Pressure 0.75 WT Barometric Pressure Sensor - Pin 1
31 Evap Purge Valve Relay Control 0.5 YL/BK Evap Purge Valve Relay - Pin 85
32
33 Idle Speed Control 0.75 WT Idle Speed Actuator - Pin 3
34 Idle Speed Control 0.75 YL Idle Speed Actuator - Pin 1
35 Power Input 1.5 RD/BU Main Relay - Pin 87

does this aply to every other e30?

No. You have 2 more cylinders to worry about.