1990 Toyota celica 1.6 overheating when it runs for about 6 miles I changed water pump and thermostat it's not blowing any water out of tail pipe and no water in oil what's should I do

Bad radiator cap...new one should fix it if it is not overheating

if your blowing white smoke out your tail pipe probably a blow head gasket.

Have you checked the engine temperature when the gauge shows fully high if it is true message and not lying and the problem is the temperature gauge? Since this happened stop the car open the bonnet touch the radiator hoses and even with off running engine touch the vents of the radiator to all surface and see it the temperature is everywhere the same.

Could be a head gasket, clogged radiator and or a heater core as well!

try replacing the thermostat. it shouldnt cost very much at all if you buy it and install it yourself. i had to do it to mine and its a fairly easy repair.

Your problem is leaking head gaskets or a faulty water pump. Check your exhaust tail pipe for black pungent prestone odor. This is an indication of head gasket trouble. Have your cooling system pressure tested. Good luck!

water pumps usually only leak after shut down but no guarantees, you may also want to change oil pump o ring seal. It's right next to water pump, they get old and leak too.Oil pump o-riing and shaft seal very inexpensive from dealer,

You need a belt and water pump. Hope everything works out for her. Good luck!!!

your problem is in your throttle sensor that controls the idle it is located right behind your intake and it has two screws that mounts it i am almost positive that this is where your problem is comig from

head gasket