2002 4.6 Explorer has low power and bucks between 40-50mph

[KA3NXN]

Hey Gang,

My 2002 with a 4.6 bucks really bad between 40-50 MPH. She also has vert low acceleration. When I'm coasting own the highway it does just fine. Yesterday I got her up to 95 MPH with no problems.

Any idea what's going on?

Jaime

 

[iowa_hick]

Spark plugs?

 

[Rick]

This member had a similar issue and came up with this:

"Just a follow up, as I found my problem and it was an easy fix.

abomb4601 and a couple others called it, was a bad plug connection.

I had replaced all the plugs and wires less than a year prior to the issue, so I kind of discounted that, when all signs did indeed point to a bad spark.

Was mucking around the other day and decided to pull all the wires and plugs, check their condition and put the meter on the wires, just to see. All the wires checked out and the plugs all looked fine. Put it back together with some fresh dielectric in the boots and presto, problem was gone."