cold weather problem
the other night it got down to about 28 degrees overnight. i started my truck, a 96 f250 auto, without issue and not plugged in and when i gave it a little throttle to hold at 1500 rpms after about a second or two there is a load on the motor and it drops about 500 rpm. i can give it more throttle and it goes up just fine but when it steadies out at any rpm for more than a second the load comes back and drops the rpms. it even did this while driving down the road, any time i was at a steady rpm the load came back and i would slow down a little and would go away with a little bit a throttle until it steadied out again. it did it a second time a few days later and it had been plugged in that evening. sorry about the long post and thanks in advance for all the help!