Jerking when accelerating between 40-60mph

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Jan 14, 2017 | 10:21 PM

Brittany Madl

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Jerking when accelerating between 40-60mph

Just purchased a 2001 Ford F150 super crew lariat v8 4.6/5.4 2v OAD at 156k miles, iv had no problems with it until I drove over the pass and after 2hours of driving my truck started to jerk when I accelerate between about 40-60mph. I don't experience any other problems over 60 it runs smoothly and in town under 40 it also runs smoothly, no check engine light. The next day is still continues to make a jerking motion, which feels like from the rear, I was wondering who else has had this experience and what they have done to fix it?

Jan 14, 2017 | 10:35 PM

brokenleg

Fleet Mechanic

Joined: Jan 2011

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sure makes me think a bad COP.

Jan 15, 2017 | 02:42 AM

Bluegrass 7

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Joined: Sep 2006

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Yes a faulty coil.
To find the one cylinder, a Scanner looking at mode 6, test 53 at the misfire counts for all 8 cylinders will show one with high counts.
That is the one to change.
Good luck.