tanneracord

Hey I got a 94 f150 5.0 5speed 4x4 and it jerks like crazy when ever I hit the gas at any speed but it idles fine and when just coasting it dies fine..I've put new plugs,wires,dist cap and rotor button,coil,fuel filter,tps,ect, and fuel pressure regulator and nothing helped

wde3477

Suggest to get the codes read to see if the computer has flagged anything.

tanneracord

Not showing any codes and don't have a check engine light on..abs light comes on like once a month

Aktech

Measure fuel pressure.

Aktech

How old is the clutch? Hot spots?

tanneracord

Good fuel pressure and don't know about clutch will look into it though..was told the abs could make it lose power is there anyway to check it?

kjhansen

Sounds like the fuel pump or fuel pressure related. I just had the same problem. Good base fuel pressure, but higher revs equaled bucking etc.

Chris_1

iTrader: (1)

How much pressure (exactly, measured in psi with a gauge) do you consider good ?

kjhansen

Idle, a steady 40-45psi although mine's a 6 cyl, not a v8. You should be able to find fuel pressure requirements somewhere. Fuel pressure should go up steadily with increased throttle. Smooth and quick, not jerky, and stay at that level when the throttle is steady at whatever rpm. If it does, then you're looking at something else, like a throttle position sensor. But sensors throw codes if they're bad. Fuel pumps don't.