Trouble building air pressure when it's cold.
I have a 99 detroit 12.7 in a volvo. I've been having a problem in the mornings building air pressure especially on cold mornings. It used to be, I would have to wait until the oil temp hit 145 degrees. Then the air pressure would build from 30 psi to it's max pressure. Now I have to warm it up to 162 degrees before it will build over 30 psi. I've replaced the air dryer, thinking that was the problem. But it still hasn't changed that problem. It still exists. If I run my generator all night and keep the engine heater on all night it don't seem to have that problem. Anybody else experience this phenomena? And how did you solve the problem???
Is this a good question?