ok so heres the deal. this mourning coming to work i crest a small hill and on the way down other side i feel a bump and look down at dash and wrench light is on. at the bottom of the road came to stop sign and when i tried to pull out no go no other lights on just wrench. shut off truck and restart and 40 miles later at work no problems. anybody have any ideas what would cause this? by the way 06 5.4 95000 miles. thx m.

 

Fuel Pump Drive Module been replaced? If not you should check its condition. If corroded like most are, order a replacement from Amazon. for about $60.

 

changed fpdm about a month ago

 

I would first see if you can plug into a scanner and get a code. Not sure if you didnt get a CEL light you might not have a code, but its worth trying. Second thing I would do is check all your fluids, especially transmission fluid. I had a Chevy Trailblazer and it went low once due to a leaking seal and when I would go up a pretty good hill it would make a the same sensation of going over a bump even if the road was glass smooth and then I would get a light on the dash. Chased it for a could of weeks before I finally check the fluid and that took care of it.

 

i don't have an owners manual so what is the wrench mean?