F150 engine vibration?


#1

I have a 2000 f150, 4.6l v8. I have two symptoms that I think are related but I am not sure. The truck has 92000 miles on it. No trouble codes.

1st. I get a vibration at about 67 mph that seems to pulsate.

2nd. I get a similar vibration at about 1200 rpm in park. This one seems to be much worse when i lift my foot from the accelerator.

I have had-the truck about a month, and just had the tires rotated and balanced.

Any help would be appreciated.


#2

What maintenance as far as plugs, air and fuel filter?


#3

Doesn’t the 4.6 have a harmonic balancer? I’m not sure.

Seeing as how this vibration also happens in park, when you’re…parked…check into that first. I wouldn’t worry about the moving vibration until that’s sorted out. If they’re related, which is very possible, then the moving vibration will go away when you fix the other one.

Chase


#4

As far as maintenance, nothing yet, I have had the truck just a few weeks. Tire balance is the only thing besides a set of shocks


#5

I would check for fuel pressure and spark plug fowling that would cause uneven ignition. Also the motor mounts on Ford have broken or loosened for that year.