Alright, so my car started stalling when I put it in reverse a while ago. I didnt bother to fix it cause it wasnt very often. Slowly it has moved on to stalling more and more and now it stalls every day, and not just in reverse. I forgot what code it puts out, but it translates to Knock Sensor. The car runs fine, it starts fine, everything is fine. It never stalls on the highway or while Im driving. Usually after I stop. Ive taken it to the shop 4 times, nobody can figure it out. Ive done a tune up and I've changed the camshaft sensor and still the same crap. If anyones got any serious ideas, I'd really appreciate it. I've got an appointment with the nissan dealership on tuesday and Im trying to save myself that 700 dollars that they will undoubtedly charge me. Thanks...