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Hey folks:

I had a similar experience as Mild Thunder did (see recent post 1998 E7 wont start). After a couple days of head scratchin and speaking to some knowledgeable folks, I found out that my ECM is bad. Was pretty much sure it was bad when I went over it with a multi-meter and the wiring diagram (I have a copy for a 1994 RD 688S if anyone ever needs one).

Found out today that the ECM is bad for 100% sure, because the truck fired up instantly on a "test" ECM a very helpful service tech loaned me.

Ok, so the old ECM is bad, I understand that I will need to get a new (used) ECM and have it "cloned" at a Mack Dealer.

I've been told that there are places that remanufacture these (and do the programming too) and offer a lifetime warranty (apparently they use heavy duty components, etc).

Can anyone recommend an outfit that will ship you a good ECM if you ship in your old one (assuming they can read the codes off the bad one?)

Thanks in advance,

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