I just replaced my opti because it was cutting out when idling and driving. Before this my coil was replaced with an MSD. After putting in the new opti, my car won't start unless i jump it from another car. Once it does run, the rpm will drop down and then jump up. (Below 500 rpm and up to 1700 rpm). Then it might settle back to 1000 rpm. No engine codes. Fuel pressure is 43 psi. I tried the old coil and get the same thing. Any ideas???