tell me the difference
Diesel Enthusiast
Joined: Nov 2009
Posts: 498
Likes: 20
From: El Dorado Springs MO
I actually think its a PCM but I think it only controls a few things like the volt regulater,speed sensor,and I think the transmission od and throttle position sensor but Im not 100% sure.
Diesel Bomber
Joined: Aug 2009
Posts: 2,124
Likes: 102
From: Lincoln, CA
is pretty much runs the transmission shifting (auto only) alternator control, and some gauges, thats about it. and they only used a ecm on 91.5 and up. 91 and down uses just a preheater controller pretty much
Diesel Fan
Joined: Dec 2009
Posts: 55
Likes: 2
From: Princeton, NJ
I think that's only 92 and 93. I think on the 91.5 they still use the external voltage regulator, etc...
