MoPar has lots of service bulletins that state the use of silicone dielectric grease on any ECU or sensor plugs or sockets will interfere with component communications.
I just tried to bring up the CAIG.COM website for you but bad microwave tonight - you'll have to do it.
CAIG sells two miracle products that are right up your alley
DeOxit D100
Preservative in a blue bottle (keep rooting around and you'll find it)
The D100 is full strength oxidation remover, the blue stuff is designed to protect computer connections in salt air environments. The D100 does not protect and the blue stuff does not clean.
Lockheed uses it on F18 Super Hornet aircraft, Boeing uses CAIG, Northrop, ATSF railroad, on and on. The products are unique, nothing else in the world works as good for cleaning bad contacts and then protecting them from severe environment oxidation and corrosion.
The stuff is not cheap. I'm cheap and I wouldn't be caught dead without the two items - they are that good. They are focused on microprocessor contact oxidation removal then protection without disturbing tiny signal voltages.
http://www.caig.com
Hope this helps