For the last few days, the engine idled rough when I started it cold. After a few minutes, the idle smoothed out. Yesterday the MIL (malfunction indicator light) came on and stayed on, even though the vehicle operated normally. I took it to the dealer this morning and it threw code P0300. The tech theorized that it might be a fuel delivery issue, and the fuel pump might need replaced if it persists. Has anybody experienced the same thing with their 392's?