Your fuel pump relay is stuck in the "on" position which causes it to run constantly even if your truck is off. Just replace the bad relay. You may have two relays though if you have duel tanks.
Yes.
2.15 lbs
I'll include a link to a video below that will show you how to repair the ignition coil in your Ford F250 or F350. hope this helps.
1990 f350 did not have a turbo, unless it was fitted after market, so check what engine you have such as year and size and then maybe we can answer your question
Possibly a neutral lockout switch, possibly a bad connection, possibly an ignition switch.
remove column dust covers, along with ignition switch. then remove retaining
The towing capacity of a 1990 Ford F-350 with a 7.5L V8 is approx. 12500 pounds.
all in all with the variations of rear ends average of about 15
No need to change the hubs. 16' rims can be obtained from Colorado Wheel Company and fitted with no problem.
Its on the a/c accumulator on the passengers side next to the firewall.....
how much horse power
check the glow plug, if it is diesel