Lately my car has been losing power under load, most of the time it sounds like a tractor the past 6 days & very high shaking of engine, sounds fine on idle at around 900-1000 rpm, if it exceeds that then shaking & tractor sounds.
here's what I've done so far:
Changed x4 spark plugs
Diagnosed with no fault codes to report
ignition coils or coil packs are apparently fine
No change what so ever except occasionally it runs smooth, misfire, smooth, misfire, smooth, misfire! not to mention the jerking!
What I'm checking next:
MAF (Would it be safe to disconnect this temporarily?)
is there anything else I should have checked?
is this a common fault?
it's a V 1999 1.6 automatic saloon.