I'm looking at purchasing a used '01 F150 with aprox. 30,000 miles on it. While test driving, I noticed some hesitation while accelerating, felt sorta like I was towing something by rope and it was jerking when the rope tightened up. It did not do this when I got into passing gear. Carmax has the truck and the salesman's explanation was that was to be expected with a low tank of gas...what crap! Its a 4WD, V8. Any help is appreciated.

 

Are you sure it wants something on the road surface such as expansion gaps or anything of that nature. Also the trucks are fairly gutless with Overdrive on. Was the truck misfiring? did it only happen once or was it all the time?

Richard D.

WHILE YOUR HERE CHECK OUT MY GALLERY:
https://www.f150online.com/galleries....cfm?gnum=2479

 

Definately was not road condition. It felt like it was misfiring or possibly got some bad gas. Carmax said their technician looked at it and the problem has been corrected. I'm gonna drive it again tonite. And, it happened everytime I accelerated, not just once, but several times.

 

Sounds like a bad COP if it was the 5.4

Richard D.

 

Whats a COP?

 

COP = Coil Over Plug
The 5.4's don't have spark plug wires' per say. Each spark plug has its own sitting right on top of the plug.
Jes

 

Thanks for the info.

 

Sorry about that sometimes we forget some people still don't know what COP is.

Richard D.

 

They probably washed the engine recently, and it has water in the plug boot. I got mine at Carmax in Atlanta, and it did the same thing. Not that it has anything to do with Carmax, just coincendence, but it went away after a little while. Then, about a month ago, I washed the engine. It started acting up big time!!!
Well after the dealer replaced two coil packs, and two plugs, it did the same thing. So I took some advice from another site I frequent, and got some electrical contact cleaner, and took the coils off one at the time and cleaned them thoroughly, and replaced the OTHER six plugs, which were badly rusted at 50k miles!!! I reset the computer by disconnecting the battery, and Walah!!! No more problems!!!
Not saying this is the case for everyone, but definately something to think about. I'll definately take more care when detailing my 5.4L.

 

By the way, its a 4.6L and I drove it again last night and it didn't misfire at all. I'm gonna get the service tech's report today from them and also do a Carfax report and then decide, but what I'm getting from all y'all is that this isn't something that should preclude me from buying this truck. Am I correct?

 

an 01 4.6L is also COP