Hello, I need some help with few problems
1. All of the sudden my coolant gauge has stopped fluctuating from 190 to 140 as is normal. It now reads bet 190 & 230 with no up & down movement. Checked coolant level & its fine. The coolant itself & the motor are not hot at all. I can put my finger in radiator. I did notice I cannot see any circulation of the coolant when cap is removed. What gives?

2. Also all the sudden my truck wants to die when I turn the air on & drop it it drive. It doesnt want to die when its in neutral or when on the hi way. This starts as soon as I turn the fan on. What gives

 

fyi the motor wanting to die with ac on was due to too much refrigerant. dropped it from 70lbs to 40lbs and idle smooth now.<br>cb

 

Sounds to me as if the t'stat is stuck closed, or almost closed.