wondering if anyone has had problems with proheat, webasto or any other heater in their trucks... i have a f-350 2010 and just put in a webasto heater in... it works awesome but in cold mornings when i go to start the truck it keeps turning over then when it does fire up the rpm's pulse up and down until it has ran for 1 min or so... need help!~!!!plzz.

 

sounds like its getting air in system or loosing it prime when it sets a while

 

it only does that when its not plugged in.