Hmm... a loose connector. Come to think of it, the unit was electric taped to the connector. It was particularly tight. However, it seemed as though when I removed the electric tape, it came free without issues.

In all honesty, I bought this car well before I knew anything about cars, electronics, physics, science, etc... I've been finding things in this car that have been jimmy-rigged. When I get back to it in Houston, I'll definitely try flexing the board and pressing on the connector, or just jiggling the wiring leading up to the ICU.

However, this I find strange. What explains the burnt resistor on the original ICU? I look at that particular part and I think, did the OVP not do its job? Could there have been fouling on the fuse that allowed it to pass more current than intended? So far I've acquired two more idle control units and I don't quite see an issue with either, but they don't solve the problem.

Well, first things first, the wiring and the connector along with soldering points on the board.

Thanks to all of you for your input and I'll definitely shoot Mr. Poole a message.

-Troy

__________________
- - - '77 federal 280e - 222k miles
- - - '85 380se - 129k miles
- - - '07 Chevy truck
- - - '79 Datsun 280zx with '82 turbo motor
- - - Currently looking for a clean 190e with less than 160k miles.