It is hard to tell, but that is a (basically) rust free 1990 F250 4x4. Is has the 5.0 liter 302 cubic inch V8, and the Mazda manual 5 speed with overdrive. Factory air conditioning.

This is the EGR vacuum regulator (EVR). The plug is broken and the contacts won't stay in the plug (red arrows). The wires with their crimped terminals simply pull out. Someone shoved the contacts into the plug but reversed, and that makes the truck run really bad. (Misfiring and no power at low RPM.) A new pigtail was $31 which is crazy, but I replaced it anyway. The EVR tested as marginal, so I replaced it.

I've tried fixing some other plugs where the contacts won't stay in by putting hot glue in there. I don't know if that is a long term fix. Epoxy would probably work better than hot glue.

Also replaced: MAP sensor, EGR valve, EGR valve position sensor, one of the vacuum reservoirs, spark plugs and wires, driver's side rear brakes, slave cylinder, emergency brake cable, ignition switch, and the alternator. I think the passenger side rear slaver cylinder is about to lock up, so that's next, along with the passenger side ebrake cable.

The tilt wheel mechanism doesn't work, and this is why. That is a screw wedged under the tilt wheel lock. Someone worked on the steering column and made a mess in there. Most of the screws were stripped. The ignition switch was bad, and had been zip-tied together. The key-removal lever was bent, and the key-removal push rod snapped off.

Unfortunately, the tilt wheel spring bail was bent due to that screw in the tilt lock. I just set the tilt mechanism to the middle position. Working on a tilt steering column is a big pain in the neck.