Those of you following along on my M54 OBD1 conversion probably know that I ran into a speed bump in that I can't mount a VR sensor in the front like everyone else can. I am forced to use the rear sensor wheel and stock Hall sender. I don't even have a front tooth wheel!
All you M52/S52 OBD1 conversion guys haven't had it so bad, you have the wheel in the front and the VR mounting bung.
Anyway, I developed the electronics to convert the digital Hall signal to something that the 413 computer can understand. It should have worked in theory and after driving it this afternoon I can say that it works in practice.
That's right, I have replaced the crank position VR sensor on my M50 with a Hall sensor and it works. Drives awesome, actually. All the way to redline. Woot!
Why should you care?
If you have a working car without problems you probably shouldn't care much. However, if you have an M52/S52 conversion on the horizon this will let you retain the stock Hall sensor in the rear and not worry about getting the VR sensor for the front and the little plastic pieces.
If you have a running M52/S52 you could ditch the front toothed wheel for the svelte M54 pulley.
Ok, here's the cool part...
I was able to "run" my motor without actually starting it.
The Hall signal is easy to duplicate and by feeding a crank position signal and disconnecting my fuel pump relay, I was able to fire all the injectors and coils. The ECU thought the motor was running.
Now, back to my M54...
All you M52/S52 OBD1 conversion guys haven't had it so bad, you have the wheel in the front and the VR mounting bung.
Anyway, I developed the electronics to convert the digital Hall signal to something that the 413 computer can understand. It should have worked in theory and after driving it this afternoon I can say that it works in practice.
That's right, I have replaced the crank position VR sensor on my M50 with a Hall sensor and it works. Drives awesome, actually. All the way to redline. Woot!
Why should you care?
If you have a working car without problems you probably shouldn't care much. However, if you have an M52/S52 conversion on the horizon this will let you retain the stock Hall sensor in the rear and not worry about getting the VR sensor for the front and the little plastic pieces.
If you have a running M52/S52 you could ditch the front toothed wheel for the svelte M54 pulley.
Ok, here's the cool part...
I was able to "run" my motor without actually starting it.
The Hall signal is easy to duplicate and by feeding a crank position signal and disconnecting my fuel pump relay, I was able to fire all the injectors and coils. The ECU thought the motor was running.
Now, back to my M54...
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