expi hesitates,jerks, from 45 to 50 mph

[cadillaccadi]

hello!!!! i have came across my first problem with my expedition,it jerks i would say from 45 to 50 mph what could the problem be? after 50 or 55 it runs fine, no check engine light. 95 thousand miles..

 

[Lane24]

Mine shuttered around those speeds when I needed to replace my U joint.

 

[svtl919]

bad coil does not throw code all the time. my did the same at same speed when under a very low load. #3 plug and coil were bad did not show on my of my scans took to friend that work as ford tech he hooked it up and told me it was the problem. replaced and runs great now.
I have an Lincoln LS that did the same thing Coil was the issue there.

 

[rex450se]

Does it jerk or is it like a shudder in the steering wheel? If it's a shudder in the steering wheel then my vote's for the U-Joint. If it is a jerk like it is missing then I would say COP or plug.

Victor

 

[Lane24]

Mine shuttered around those speeds when I needed to replace my U joint.

Oh sorry. I kind of read the OP wrong. Was assuming a physical jerking shudder and not an engine jerking. Carry on....

 

[cadillaccadi]

well i figured it was my spark plugs so i went ahead and changed all of them. plroblem solved... plug 4 and 8 broke on me and to let yall know this chits are hard to work on.

 

[hammerg26]

What year is your Expy?
I am considering replacing my plugs - have to weigh cost vs. time... how long did it take?

 

[cadillaccadi]

its an 06, bought the lilsle 65600 tool for $67 dollars new from ebay and spark plugs motorcraft sp-515 for $85 dollars. i think it was $158 total includes the anti seized stuff. i took a whole day bro that included taking 2 hr breaks and stuff, u need the lisle tool incase u break one. it was not hard it was time consuming,u have to be patient. oh pb blaster too.