Hello. I have an L48 and every once in awhile when I turn the key the engine tries to start right away. Normal operation is turn to the first stop on the key switch to warm the glow plugs, when the glow plug indicator light goes out then I turn the key to the next stop and the tractor will start. But sometimes it just tries to start and it won't because the plugs haven't warmed up. It just tries to turn over. I think it has to do with the foward/reverse pedal because if I press on the pedal while the key is turned it stops trying to turn over. But that's just a guess. Does anyone know what might cause this? Thank you.