First time to post on the forum but I'm desperate to find an answer as I have taken it to my local mechanic and he cant figure it out.


Truck normally runs fine but if I go slow and hit bumps in the road or drive through a field the engine starts shaking and it sound horrible but if I rev up the engine it goes away. Not sure what it is but need help on what to do to fix the problem. Any suggestions would be great on what steps to take to fix the problem? Thanks

 

Not getting any engine codes? take a look at your fuel return line. Same was happening to my daughters truck. Mechanic couldn't figure it out, dealer couldn't figure it out. i was looking under the hood for a different reason and saw dampness around the fuel return quick connect. replaced it and never cut off or ran rough again.