Hey guys.... I am lost. I recently had à problem with à clogged heater core and now my vans engine temp dropps while driving and slowly crawl back up When idleing. The thermostat has been changes and the system professionaly flushed.... What is wrong

Sounds good to me, but if it bothers you get a thermostat that works at a higher temperature.

Well at -26 degrees wé Ars freezing out butts off and it games forever to defrost the windshield.

If the temperature is dropping when driving, the thermostat is stuck open. Cover half the radiator with thin cardboard until you get it fixed.