Hey all,

I have a 2003, 4.6 F-150 with 201,500 miles

I am having some A/C issues. It's just too hot out there.

#1 The truck has a lack of power when I have the A/C on. It feels like it wants to stall out in the lower RPM's. I loose power when I go 65mph+. The truck actually stalled on me yesterday in the parking lot. I turned off the A/C and it ran fine.

#2 I have to go over a 5000ft pass daily, I turn off the A/C when I go over it. Below the pass, the A/C doesn't work well and it's not as cold. But when I get over the pass, the A/C turns very cold. The pass is like a 3-4 mile stretch.

Thanks for the help!
Mark

 

Have you checked your vacuum lines? It sounds like you might have a bad vacuum line somewhere.

 

I have replaced my PVC line, the end connector melted in the back. The truck didn't run right afterwards. I disconnected the battery and it ran good for a while. It seems to be rough again.

What other vacuum lines should I look for?