J Tuck
Member
I've got a 2007 Ford Expedition (Limited 4X4) that I've been having trouble with for a while now. It bucks/surges while accelerating, and while cruising at highways speeds (any and all loads). It seems to run fine right after starting up after sitting overnight, but once I've been driving awhile (5-20 minutes), the bucking begins, and usually continues until I get to where I'm going.
This all started February of 2021, when I swapped my tires to a (stock size) mud/snow tire for winter. This is when I first noticed the bucking during acceleration only. But it was infrequent and only during acceleration. I swapped back to my summer tires (again, stock size) and never noticed the truck bucking all summer while I was driving it. It's now nearing winter, I've swapped back to my winter tires, and the bucking/surging is back.
So far, I've tackled the easy items. Drain and filter for transmission... New (one piece Motor raft) spark plus... New air filter and MAF sensor... And problem is still happening in a big way.
I've checked my fuel pressure at idle (parked) and it shows ~70 psi, both at idle and pre-cranking. I have a fuel filter I am about to change, but that doesn't seem like the right fix. Going to change it anyways. Couldn't hurt, right?
As the title states, the Mode 6 data shows 0 misfires every time I have checked, and I have no codes showing up from any of the modules... Until a few days ago... When I started up the truck on the first below freezing morning of the season, I started it up, and let it warm up (more than usual) before heading out for the day. When I got in it, it had the wrench icon on the dash... So I plugged in my reader, and pulled codes...
I got:
U0073 (Pending)
P1500 (Grey)
U0073 (Grey)
U0100 (Grey)
U0101 (Grey)
U1900 (Grey)
I've looked all those up, and it looks like a bunch of stuff stopped communicating briefly, and threw a code for Vehicle Speed Sensor Intermittent.
I'm lost, and all the upcoming potential fixes look like they'll be $250-$500 for parts, each... Any ideas?
- Desperate and Going Broke
This all started February of 2021, when I swapped my tires to a (stock size) mud/snow tire for winter. This is when I first noticed the bucking during acceleration only. But it was infrequent and only during acceleration. I swapped back to my summer tires (again, stock size) and never noticed the truck bucking all summer while I was driving it. It's now nearing winter, I've swapped back to my winter tires, and the bucking/surging is back.
So far, I've tackled the easy items. Drain and filter for transmission... New (one piece Motor raft) spark plus... New air filter and MAF sensor... And problem is still happening in a big way.
I've checked my fuel pressure at idle (parked) and it shows ~70 psi, both at idle and pre-cranking. I have a fuel filter I am about to change, but that doesn't seem like the right fix. Going to change it anyways. Couldn't hurt, right?
As the title states, the Mode 6 data shows 0 misfires every time I have checked, and I have no codes showing up from any of the modules... Until a few days ago... When I started up the truck on the first below freezing morning of the season, I started it up, and let it warm up (more than usual) before heading out for the day. When I got in it, it had the wrench icon on the dash... So I plugged in my reader, and pulled codes...
I got:
U0073 (Pending)
P1500 (Grey)
U0073 (Grey)
U0100 (Grey)
U0101 (Grey)
U1900 (Grey)
I've looked all those up, and it looks like a bunch of stuff stopped communicating briefly, and threw a code for Vehicle Speed Sensor Intermittent.
I'm lost, and all the upcoming potential fixes look like they'll be $250-$500 for parts, each... Any ideas?
- Desperate and Going Broke