Car wants to die when I'm stopped and air/heat is on
I have a '07 PT Cruiser. When I'm at a stop and the air or heat is on, the car acts like it's about to die. The engine then revs up and the car jumps forward a little bit. I recently was going down the highway and when I floored it to pass a car, my car started jerking back and forth and the gas peddle didn't work for a second. I took it in that day and they replaced the crankshaft position sensor. I thought the two problem were connected, but it still acts like it wants to die when I'm stopped. Any ideas what it could be?