2001 johnson 150hp that has a miss at low rpm's, called the shops around here and they are two weeks out and i have 2 tournaments coming up that i can't miss. motor runs very strong once i get around 1700 rpms, but has a miss at idle to 1700 rpms, sometimes it dies and is a little hard to start, changed plugs out, the old ones had alot of black on them but the new ones didnt help also checked compression and was great, just had a complete powerhead rebuild about six mounths ago, just dont want the huge cost of a rebuild again. any ideas? one person told me it sounded like a cam sensor, thanks for your time and help!!!!!