It should be continuity while cold. The CSI is energized by the starter solenoid and grounded by the timer switch if then engine is cold. If the engine is hot the switch will be open, so no current flows though the injector
Yeah, the 90 amp was part of a "cold weather" package that also included a different motor mount. It can be ground to fit, I did this mod but the 90 amp alternator I had failed a few months later and I went back to the 80 amp one.
It depends on the market they were made for, I believe some Australian 80's came with the HF1A part time case from the factory. All USDM 80's were full time 4WD with the HF2A and HF2AV (for viscous coupler in 93 and newer).
Mine is now plugged completely (in theory with pressure/vacuum in the gas tank but haven't noticed anything so likely the gas cap has a leak) and no ill effects with regard to smells or performance.
The "Canada" spec 22R emissions system had the tank venting to the carburetor intake so it's...