Radio reset/engine missing
I have a 1993 f-150 6 cylinder (140k mile) that I purchased new in 1994. Recently it began "missing" and at the same time, the clock radio resets to 0:00 hrs, particularly after sitting all night. I removed both the positive and negative battery cables, cleaned them, and reinstalled... no good. Worked fine for a day and then the problem reappeared. I replaced the 5-yr old battery... still no success. Several years ago, I replace the ignition keylock, which sticks on occasion. Not sure if that could be contributing to the issue. The motor operation symptoms feel similar to having an in-tank fuel pump going out - which I've replaced both within the last 3-yrs. However, it doesn't explain the electrical problem and it seems unlikely that both tank pumps would fail at the same time, as the problem occurs when operating either tank.
I'm not a mechanic by trade, but was forced to learn to fix the few issues I've had with this great truck when we lived in the remote Alaskan bush. Sites like this one have been my "saving grace". Thanks much... Nickmont