I am sure they do and ford cummins does also but then that would take all the challenge out finding out if I can use the original dodge/cummins tach sensor
if that doesn't work I can I know I can use the cam sensor off the ford
I think it has to do with the number of pulses. I think my 6.0l is looking for 60 or 60-1 or something like that, so I got the tach ring to match from GOS. Your 99 was that gas or a 7.3l? I think the Cummins is only a single pulse. or single gap, IIRC, it has been a few months since I messed with my tach.
You have to keep the cam sensor and the crank sensor wires seperated until you get to the sensor then wire them together if you run them together they will pick up signals from each other and cause problems, the shielding on the wires is crap, I think you can wrap one in aluminum foil but that is a pain and doesn't look very good.
I think if you have a common rail you can just use the crankshaft sensor for tach but I think there is still a cam sensor signal from somewhere. I never tried it with just the crank sensor, but mine seems to be working very well with both. How do you know your computer is looking for 4 pulses? the V-10 looks for 40-1 and the 6.0 is looking for 60-2 yours could be looking for 12 pulses it depends on what motor you had to start with.
I did that I tied wire # 48 and 85 together before the pcm I checked 85 and I have continuity back to the sensor I have not pulled dash out to check that yet
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