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Old 05-29-2002, 01:06 AM
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mikemover mikemover is offline
All-seeing, all-knowing.
Join Date: Aug 2001
Location: Atlanta, GA
Posts: 5,514
I'm guessing here since I've never messed with one, but I'd say it sends your ECU (the engine's computer brain-thingy ) the exact engine RPM....Without such information, it probably has trouble adjusting air/fuel ratios, timing, shift points, etc. correctly.

But don't quote me....

1979 300 SD
350,000 miles
1982 300D-gone---sold to a buddy
1985 300TD
270,000 miles
1994 E320
not my favorite, but the wife wanted it
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