Originally posted by pandaboo911
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MS41 expects VSS to come from an ABS tone ring, which iirc is 48 teeth, whereas the E30's VSS signal from the diff is 9 teeth. You're ~5.3x too slow if you feed the ECU the stock signal, but, you can change the multiplier for this with romraider (or your tuner can do it if you aren't tuning it yourself). They have a field set up to just go in and change.
Some details here:
Edit: I might've misinterpreted what your problem is, I guess it's more to do with lack of conditioning by the dash than what I posted about.
If your dash works and you just want the code to go away, you can (in romraider) turn off the VSS DTC/adjust revlimiter to not act weird because of it. VSS may affect vanos activation points and some rev limiter settings that work off speed in the S52's MS41.2 (but M52 MS41.0/MS41.1 don't use it to the same extent)
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