I have a 1993 Toyota truck with a 22re fuel injected motor and have done
just about everything to make it run cooler.  Replaced fan clutch, radiator,
power flushed the cooling system, thermostat, hoses, belts are tight, egr
operational and working, radiator cap, 50/50 blend...  I believe the sending
unit is working correctly because when it does get hot (usually idling in a
drive thru in the sun) it starts to idle poorly and stall.  It is getting
hot.  However I have no temp guage other than the one in my dash so I
couldn't tell you for sure it is is exceeding  it's 190 degrees

The only thing left I haven't tried is pulling apart the water pump and
check the impellers however I've never seen this happen before.  Most of the
time they leak thus loosing pressure and overheatingr.    I replaced this
pump 4 years ago.

Another thing I suspect is oil pressure which I haven't checked.  I even
tried some engine treatment "Prolong" to see if it might help if it was and
no effect whatsoever.

The engine runs beautifully otherwise no problems whatsoever.  It has only
80k on it since it's rebuild.

Any help or feedback is much appreciated

Thanks in advance,

Carey