Model: Focus SES
Transmission: 5 Speed Manual
Engine: 2.0L I-4
Last summer my Focus stalled while climbing a hill with the AC on. It was a hot day and I had the AC cranked on high. I immediately put the clutch in and tried starting the engine again before I started rolling backwards down the hill but it just would not start. I then maneuvered to the side of the road and kept trying to start the engine. The engine would hesitate and sputter, nearly starting, but then die as soon as I tried to give it a little gas to keep the RPMs up. I had it towed to a nearby Ford dealer and it finally started again in the dealership parking lot after sitting for an hour. The mechanics there claimed in was a faulty fuel pump, and wanted to charge me $800 to import a replacement part (not including labor)! I told them that I'd get a second opinion and then drove it home with the AC off. I have been daily driving it with no AC for 9 months now and it has not stalled once and I think my fuel pump is working just fine. However, today I tried using the AC again and after 30-40 minutes the engine did stall.
Poor graduate student here looking to save some money. Any insight is appreciated!