Ωhm

Your front grille is upside down. Flip it. Great looking truck.

That looks more like the 200° mark. My guess is your reading 195°.

For a factory gauge, here's the spec for the factory coolant temp sender.

Perfect example.

This is a veteran's organizations, known as the 40&8. At one time things like this were everywhere. Homemade trains.

IIRC, distributors itself were indexed incorrectly. Meaning distributor gear to rotor tip was wrong. This faulty distributor made its way into production vehicles. I believe notice was sent to all owners for replacement distributors. Remedy was to replace with corrected distributor. Till then, one could cut the tab and fix it that way. So, if the swing of the distributor housing is minimal, you’ll be OK, if not, you may shift the INJ’s firing. This problem showed up as ‘crossfire’ in the cap at higher RPMs with full advance on timing.

Purpose of the tabs on the distributor housing is for keeping the SYNC SIG pickup and the distributor cap in their correct locations. Rotating the distributor housing, this way or that way, one could possibly shift INJ firing order. Not change the firing order but shifting it. If INJ#1 calls for fuel, INJ#5 or INJ#4 could be fired, depending on which way the distributor housing was turned.

True, but that's not me.

Don't recall where that photo came from, but I do recall that the rotor tip needs to be pass the distributor tower (#1). Keep in mind that the 20thou gap is fixed. Meaning when the gears (distributor/cam) are engaged, the rotor tip will/should end up at that location. It's no easy task to line this up and drop it down.

My indexing guess is one tooth off. Move rotor tip clockwise.

Try this instead of pulling the vacuum line off each time, until you get your new FPR. During CRANK hold the throttle pedal at WOT. This creates a CLEAR FLOOD condition and shuts off the injectors between the cranking speeds of 300-400 RPMs. May help here.

Low Beams C102_7.

Photo @Monte721 Check C102 connector for front lighting issues.

Desert TV remote control buttons or TV remote control voice?

overcast summer or winter

909761367__JEEP1991SequentialFuelInjectionManual_1.pdf Check out pages 38 & 39. Talks about A/C Select and A/C Request. Includes circuit drawing.

With code 12 you're not in "limp in" mode. Problem could be 'Non-Monitored' circuits or systems. Fuel Systems/Issues are on the top of that list for things to check.

Shouldn't the vehicle show at least a PASS (12) code? Could vehicle be in "limp in" mode?

Good looking MJ. Now you gotta flip your front grille, it's still upside down. @Pete M can't help you with that.

How does the engine start and run when the "NEW" resistor is bypassed?

Using your REM, post up your STFT and LTFT numbers.

Yeah that's the Mavrick I remember too, not so fancy though. Love the spinners. MJs need spinners. 2022 Ford Maverick vs. 2021 Ford Ranger

Glad it worked for you. You can get them at a lot of places, I would think. Some will say just leave it bypassed, myself, pick one up and remember your symptom.