2005 expedition acceleration issue

[Brad_expy_2005]

When I try to pass someone my truck starts to hesitate or jerk, that's the best way I can describe it. It does fine picking up speed from a dead stop and seems to be just while passing. No CELL or anything, just the issue picking up speed to pass and it's not all the time. Any ideas?

 

[plumcolr]

Yeah. Marginal coils. Replaced all of mine with MSD Street Fires. Problem went away and gas mileage improved. Summit Racing, 8 coils for $162 and change.

 

[Brad_expy_2005]

I average 16-17 mpg, and it runs great 99% of the time, just this slight hesitation when passing and it's not all the time. I can accelerate from 0-90 with no problems and pretty dang quick for the weight of the truck. It's just when I'm already going down the road and try to pass someone.

 

[docraymund]

Might be fuel related. Instant wide open throttle needs more fuel. Try replacing fuel filter.

 

[Brad_expy_2005]

Ok, thanks

 

[Brad_expy_2005]

That still doesn't explain why it doesn't do it from a dead stop, if I floor it sitting still it does just fine it's only after I'm already going down the road

 

[stamp11127]

Verify tps operation - looking for a dead in the range.

 

[Brad_expy_2005]

How?

 

[BrinkExpo]

Just had this happen to my truck and it was 3 bad coils. Cylinder 1,5,7 I believe.

I had no engine lights but when I plugged in my scanner while driving the codes pulled.

 

[docraymund]

You may have a problem with the VCT system causing your truck to hesitate on acceleration from speed. It may not be noticable when flooring it from a dead stop.

Try reading this:


http://www.expertswrite.net/ford-5-4l-triton-3valve/variable-cam-timing.html