I just purchased an 02 f-150 extcab 4X4 air works fine but if im rideing along on the interstate or highway and the the motor lugs because of a hill or acceleration the air cuts out until i level off is this normal or do i have a vacume leak or something..thanks

 

Crazy...my '03 just started doing that this week. It's driving me insane!

 

Are you guys saying the system stops blowing cold air or no air at all?

 

..or does the air divert to the windshield?

A more complete description of the fault is in order.

Steve

 

I thought I read somewhere that the computer will shut down the AC compressor when the computer senses the motor pulling down as on a large hill or passing to give you more HP. Maybe I dreamed this.

 

Certain vehicles do. His isn't one of them.

 

It diverts to my windshield. I have to typically let off the gas to get it to come back to normal. Before I noticed it going up grades in the freeway (a couple weeks ago). Now it does it more and more as I'm driving (regardless if I'm going up a grade or driving a regular street).

THanks

 

You have a vacuum loss problem. Check the hose behind the battery going into the firewall, a common place for the line to crack.

 

Torkum -
Thanks. I'll take a look