Hi Lawren,

Glad to hear from you about your car.
A little conveyance goes along ways to moving things along.🤓

I would say the compression numbers are good enough to say everything is fine with the engine.
I don’t know what those percentage numbers mean on a leak down test.
Variances in numbers is to be expected with mileages of any kind with how the rings are sealing.
Cranking speeds vary from engine to same engine in relation it tightness IMO.
MANY VARIABLES come with everything it seems.

I would guess if they put a resistance in why not at the sensor?
OR … the wires have been wiggled enough to create more resistance or less conductance and therefore a lower reading. Maybe they took what they could get and gave up.

How the timing got moved must have been some other intervention?

I believe you are on to resolving this issue shortly, as there isn’t much left to ponder.
It must be wiring from what I’m gathering here.

Keep plucking the at harness and the keyboard as inquiring minds would like to know.

Phil