Pedro
Well-Known Member
I recently changed the HPFP on the 200 GT & noticed there appears to be a Humming sound (up & down tempo) from the engine? I always wait for the oil pressure to build up before I set off but it has never made this noise before I swapped the pump & Its got no faults thrown up & runs fine but it has me thinking the engine could be hunting for a timing parameter which is very odd as the tensioner was changed & chain does cry in very cold weather but why its suddenly begun to hum a tune is very strange unless there could be a lazy coil pack/packs on the horizon but at 43.549 mls I could be wrong as according to some expert websites? the coil packs should last the life of the car!