This morning I went to warm up my car for several minutes. Everything seems hunky dory, no strange engine behavior. But the second I pop it into reverse, engine dies. I start it several more times, and the moment I shift down to either R, N, or D, same deal. Electrical stuff seems to be working fine. There’s about 55000 miles on the car. Can anyone give me a vague idea as to what the deal could be? Thanks in advance.