1990 won't start Help??
Recently bought my son a 1990 F150, 8cyl, 5.0, Ext cab, AT. It needed general maintenance, plus valve cover gaskets replaced. We changed the oil, purchased the gaskets, plugs and wires and a throttle position sensor because of issues with the truck stalling out when he would put it in gear and start to drive.
Before we got around to changing the gaskets, plugs and wires, he was driving home last week and the truck died. Completely dead as a doornail. Had battery and alternator tested, both tested fine, so we took out the starter and it was bad. Changed starter and solenoid, and all seemed fine again (Sunday evening).
Yesterday (Monday) morning, he was driving to school and the truck kept stalling on him while driving. He would pull over, and it would start right back up. Since we already had the TPS, we installed it last night, cleaned the throttle body, changed the air filter, and replaced a couple of hoses that were dry rotted. (Also disconnected the battery ground, as I've read, to reset the computer.) After getting it all back together, the engine ran like never before, but the transmission jumped a bit when shifting. We drove for several miles to make sure it wasn't going to stall out again.
This morning, it wouldn't start. Engine turns over, but won't start. I had already left for work, so I wasn't there when he tried to start it, but I listened on the phone and the engine was just spinning. I do want to check the wires when I get home to make sure I didn't bump one when I was removing the throttle body, but last night there was no hesitation when starting it.
I wanted to change the plugs and wires last night, but didn't because we got done with the throttle project so late. Will probably start by changing them this afternoon. Anyone have any other ideas? Possibly the ignition switch?
Still have to get around to changing out the valve cover gaskets but I think that's a project for my son and his dad.
Thanks for any help!