I have a 03 F7 and after warming up it loses a cylinder. No check engine light on, so maybe electrical. We've OHM out the magnito, the pickup (0r timing sensor and anything else we could, then did cont. test on the harness while trying to move it to find short.... Inspected the harness no visable issues...the ignition coil does fluxuate when you heat it up....But not out of the 20% parameters.. I do have another 03 F7 to test with.. Plug on dead cylinder is wet so should be spark or the injector is stuck open.
