Quote:
Originally Posted by Panzermann
I have a functioning tach amplifier to fit into the diagnostic plug with input from the front of the crankshaft (not the flywheel at the rear). But with the transmission from the 1983 300D, is there a way to even attach a flywheel sensor and would that even be desirable?
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At the time of replacing the engine, you could of transfered the '85s flywheel and bellhousing plate to the '83 motor. That would of been the easiest method and you could of kept the same tach and A/C setup. But to do it now with the motor in, I believe it is impossible because I think you need the '85 flywheel.
Quote:
Originally Posted by Panzermann
I don't have the data coming in from the EGR system and the turbo anymore. The way I figured getting around this was to "convert" the system to a 1983 set up, simpler. So how would I connect the tach amplifier from the diagnostic plug up so that it feeds input to the tachometer on the dash....?
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You will need a 2 prong tachometer from an '83 or older SD. If you look on the diagnostic port on your wheel well, you notice holes with numbers associated with them. #2 is gound and #6 is switched power and leads to the firewall. You will need to add in a wire for #3. Get the wire and plug for the back of the tachometer (instrument cluster) from the donor vehicle. The green-black wire from the tachometer plug goes to the #3 prong on the tach amp and the red-black one goes to switched power that you will need to find. Then hope it works!