I've been pouring over all the threads on the 84 Cali and 85 Federal models with EGR and their propensity for water damage of the harness plug into the EGR control module. No one ever seems to offer anything other than repairing the harness and replacing the module.

While I did go and find a pristine EGR module, clean plug and large chunk of harness at the PnP yesterday, I wondered, "Why the hell am I even putting this module back in? All I need is my tach and A/C back. All of the EGR system has been removed!"

So I spliced the the white (RPM sensor signal wire) and grn/bk (to tach) wires from the harness together and guess what? SUCCESS!

I made sure to cover the power lead from the OVP so it doesn't short out on anything. But if you're running sans EGR, there doesn't appear to be any reason to run the EGR module.

YMMV

-Andrew

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'85 300TD "Puff The Magic Wagon" - Rolling Resto
'19 Mazda CX-9 Signature - Wife's sled
'21 Morgan 3-Wheeler P101 Edition
'95 E300d - SOLD
'84 300TD "Brown Betty" - Miss this one
'81 240D "China Baby" - Farm grocery getter