1994 F150, 4.9L I6, 4X2, MT, 212K mi.
Gee, I really screwed up!
Truck started making a “growling” noise and was down power. Oil gauge read 0 psi. Unfortunately, I was on a busy back road with no shoulder and cars behind, so I had to go about 1/2 mile, uphill, to a pulloff.
The truck lost all of its oil from the oil pressure port where I had installed a mechanical gauge several months earlier. It seems to have pulled out of the compression fitting; in hindsight, the engine must flex more under torque than I had accounted for!
I got a ride, fixed the leak, and added oil. Drove it ~15 miles toward home, with no noises, but less power on hills. Engine then made a metallic noise, and stalled. All attempts to restart failed.
WHICH BRINGS US TO TODAY
Started diagnosis. Cold compression is 120-130, all cylinders, which is less than it was, but seemingly enough to run on, Vehicle has no spark when cranked! The distributor cap rotates when cranked (no idea if in time or not), and the distributor gear was pulled and no missing teeth.
Any idea what could have failed on the engine that would result in a “no spark” condition? I suspect I need a new engine, but it would be nice to have this one running in the interim.