YOU MUST PROPERLY BLEED THE COOLING SYSTEM TO ACHIEVE HEAT AT IDLE. I JUST DID MINE AND WORKS GREAT. BACK FLUSH HEATER CORE AND REMOVE UPPER MOST COOLANT HOSE I.E. SMALL HOSE TO TOP OF COOLANT RESEROVOIR/ EXPANSION CHAMBER AND USE PROPER FUNNEL ATTATCHMENT TO BLEED ALL AIR FROM SYSTEM
Off hand, I'd have to blame this on using non-adaptive cruise control in snow when driving uphill. Even with the chains on the front (and assuming front wheel 2WD), the cruise sensors could be misinterpreting wheel spin vs. ground speed. With 4WD and chains only on the front, I've got to imagine that this discrepancy would be more pronounced. Perhaps the ...
Thank you so much for your advice. I do think I need to reset my ECM.
By the way, I have posted a whole bunch of charts here for anyone interested. Maybe they can pick up clues that I am oblivious to.
Try with changing the fuel filters/stainers and properly overhauling the fuel injection system. Check for any fuel leaks. Check for the proper functioning of ignition system too.
If there is no significant improvement after that then clean MAF sensor, Throttle body and Idle Speed Control (ISC) sensor with special cleaning sprays. Replace the gaskets if ...