Ensure belt is on, check coolant level, check for leaks (ensure pressurized), Squeeze upper hose & check for circulation, do that when engine warming & you can tell moment when thermo. opens. Start there.
I have a 1990 e150 and it has 2.
the fuse is in the dash behind the overdrive switch
Hose failure, core plug failure, headgasket failure
on the top of the engine compartment firewall
12qts with the torque converter drained. It will be far less if you have just removed the pan and filter.
How do I replace the heater core in a 1999 Ford e150 conversion van
if fuel gage is not working on a ford e150 van what do you do to find what is wrong and how do you fix it
How do i change the heater core on a 1997 ford e150
Yes. an external fuel pump can get hot enough to cause vapor lock on a 1990 ford e 150 v8 5.0L.
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Check selector switch and wiring take it to the shop and find out its probably old.
e150 is a half ton and an e250 is a 3/4 ton