AMC Eagle

[MIPS]

That was basically my idea. If this is the cause of the timing advance issue when hot (and in ported vacuum mode) then bypassing it, setting the timing and then driving it while still hot should yield in a running engine. If it doesn't....that only leaves one thing left.

[MIPS]

Finally found a #*$&@!? 1 1/4" wrench to replace that bastard CTO switch. God damn that thing is in an awful goddamn spot and requires removing a ton of vacuum lines, the fuel lines and the coolant temperature switch to finally reach it.



While I was in there I also investigated the Coolant Temperature Switch itself. Unlike the 83 and later this is a three wire device that controls the computer and the manifold heater. In my case it read open on both outputs both hot and cold, meaning that the manifold heater didn't work and the computer never went into Closed Loop because it thinks the engine is still cold.



While the two internal switches are adjustable, removing the calibration pins found they had both corroded up. This switch after three weeks of looking is unobtanium so it will have to be dismantled, cleaned and recalibrated.

Meanwhile I took advantage of the hot weather and drained coolant to remove the heater box and replace various foam gaskets that were buzzing or spraying foam everywhere every time I turned the heat on. In the process I discovered a leak in the heater core, so the car is gonna run for the next week or so without any air box at all because I'm not putting that thing back in, only to remove it next weekend. It's easy on the eagle, but still not enjoyable.