sylvester550

Hi guys I'm a newbie, I have a p38 4.6 range rover, the car start fine but when you rev it, it misses, and then goes away, when I select drive and take off the car doesn't want to move it hardly creeps up to 30 or 40km, and won't go over that, but it pops a little and it's struggleing, I've changed the spark plugs and the coil packs, and still the same, I was thinking it's a naff sensor or fuel pump, it's a petrol rr, because when I disconnect the maff the car goes lumpy and turns off, what could this be,