Oh ok. So you meant to check spark at the spark plug. That I can do. Thanks

 

If it ran progressively worse until it died, then it's not likely an ignition failure. But if you want to test the ignition system, follow the procedure in this caption:


(phone app link)

It's more likely fuel pressure-related. Put a gauge on it so you can see it while driving, and try to notice what it does next time the truck runs badly or stalls.


(phone app link)It's not actually the pump; it's the valves inside the head of the FDM. Read this & the PREVious caption:


(phone app link)Not likely. The outside of the filter has no impact on how the engine runs. If it runs well, then the inside is probably OK, but it sounds like it's overdue for a change anyway. Before you attempt to change it, read this caption carefully:


(phone app link)

Make SURE you get the correct filter with long nipples.Something is cooling off, or folding back into place. It's ALWAYS worth checking the battery terminals - read these captions:


(phone app link)The ICM got moved in '92.


(phone app link)That changed to all-electronic in '93, and vacuum hose leaks wouldn't make the engine stall anyway. They'd make it idle high & maybe rough, but they wouldn't affect driving enough to notice.

 

Steve, you are a rock star. Thanks for taking the time to address my issues. You gave me a ton of great info. That gives me plenty of things to check. Thanks to the others who also responded. Your help and ideas were much appreciated.