Bumping when accelerating at 45 mph | Ford Explorer Forums - Serious Explorations

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Bumping when accelerating at 45 mph

sadikXmath

New Member
Joined
January 31, 2015
Messages
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City, State
Montréal
Year, Model & Trim Level
2007 sport trac v8
hey guys!

when i accelerate from 45mph i'm in the 5th gear , about 1800RPM and the truck feels like there is someone bumping me from behind , and then if i downshift it to 4th gear and 2400RPM , nothing , everthing is back to normal for a time and then starts all over again , maybe 5-10 minutes after.
I was wondering what it could be so i dont get a huge bill from the corner mecanic
 






Misfire. Replaces the plugs and/or coils.
 






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