1993 Ford F150 engiine runs hot

When the gauge goes full hot does th eengine actually overheat? it should push coolant out or make a deep popping sound when overheating.If not it may be a bad gauge/sender or connection in between. May want to try a manual temp gauge also to monitor it before attempting to diagnose an electrical or overheating issue

Thanks for answer, when trucks gauge gets hot, the engine is not really hot, water sending unit was replaced, engine is hot , but not real hot like gauge says. don"t know if gauge is bad or not, thanks

Try an aftermarket to be sure of where it is really running

Jack thanks, could a clog catalactic converter cause a engine or gauge to run hot? thanks, ps I "ll try to send you or who ever a donation, thanks

It could, but it would most likely just go hot and stay that way until the engine cooled down, not go back and forth like you described

Jack, thanks, I"ll try new gauge, get backto later, could there be a flowing problem somewhere else, or could thermastat still be causing problems, thanks

Flow problems usually cool off when you start driving them , but get hot at idle, they rarely spike up and down.You could try another t-stat, I have gotten bad ones before, but not too often

Jack hi, This is Paul, Hay change top @ bottom hoses, both were colulapsing when engine runs hirer, so I change them, did not help, so after changing them @ driving it did the same, got home check under hood, top hose hot, check bottom it was cool after driving for awhile, It "s got me, Hay thanks//////////////

Have you tried a manual gauge to see what the temp actually is? Also have it chemical tested for a blown head gasket

Hello jack, i hope I got your name correct, used a manual guage , still runs hot, so I think a worn out water pump, or a blown head gasket, bought a chemical kit for checking head gaskets, haven"t check yet, I think water pump is bad, yet you know, thanks

Hello, We tried mechanical gauge, cylinder leakage test, no leaks, but found a big air pocket @ after that it seems fine. thanks