Had to do this on my '01 Excursion...

My '05 Excursion came from the dust bowl of Texas: Hereford. So I may have to spray the pedal connector this evening when I get home.

One guy with either a 2002 or 2004 Excursion had a dead pedal when he tried to leave for work. He'd had issues with it before, got frustrated, and stomped on the pedal a few times. He figured he must've cleaned the potentiometer, but it never did it again after that...

 

I am having the same problem.........but fighting a stiction issue on the #1 cyl....

 

Dang Miles this been going on along time your probably ready to jump it off a Cliff LOL I know I would Be



LOOKS like you may have found the Issue since you are able to wiggle the Acclerator pedal wires and DRASTICALY change the reading

The Acc Pedal uses V-Ref so that would Also explain some of the Other DTC if V-ref is Corrupt it could very well be messing with any other sensor that uses V-Ref

ALOT of the DTC you have/Had Share wiring WITH the ACC Pedal so Starting to Look like you may have Finally solved this


The Only other thing I see is the Cooling fan DTC Now Im not seeing that it uses V-Ref BUT it does Supply Vehicle Battery thru the Fan to the PCM
So Maybe a Fan Wire is shorting out off/on and the PCM loses V-Bat intermittenedly IDK

Id fix the ACC Pedal like your thinking and see what Happens

Is it the V-Ref wire at the Acc Pedal that is shorting out

 

Thats what im guessing since i just had the entire engine harness replaced, and i guess the only other thing that uses the vref signal is the transmission range sensor

 

Have you replaced the throttle pedal yet?

 

My mechanic has a test pedal he swaps into trucks which he told me he tried already, and it still didnt work when he was trying to drive it into his shop

 

Was that before or after he replaced the harness?

 

I have no idea. but when i wiggle the TPS harness the vref and pedal cut out...so im assuming its the harness...and/or tps

 

still nothing

 

Dammit,, all in one. so the connections to pedal was good? you checked for your self. what does the Tack do when this happens/ rear diff on the top drivers side pumpkin is the senser for VSS I would bet that this would be at some sort of Fault readings for VSS Please.

 

Hey there, acf6. Been reading through this thread and some of this sounds too familiar. The surging at idle after a long trip. This hasn't been much a problem lately, but it was terrible at times. Hasn't done it for a long time now. The random hot long crank is just... yeah, random. The blue smoke when cold, I see every time I start it and the exhaust smells different from all other 6.0L's I ever smell. (There's 4 of them on my yard every day) The random acceleration pedal problem where you shut it off and then it's good again. First did it to me 6 months ago 800 km from home at 10 PM, which is frustrating! Never came up again til Christmas. Two consecutive days, but hasn't acted up since. The fan code (P0528 on mine) has always been there since I've had the truck ... Now a few questions. What kind of boost numbers do get, say at 80km (50 MPH) if you push it as hard as you can without unlocking torque converter? Does yours also seem sluggish on bottom end? When it starts warm, does it crank until it fires and then perfect immediately, or does it seem to begin to fire and then slowly gain momentum until it reaches idling RPM? Does your turbo sound slow in spooling up?

2003 6.0L 265,000 km
ARP head studs
EGR delete (valve in place)
Intake elbow upgrade
EDGE Evolution CS

 

Yup that pretty much perfectly describes my truck most of the time

When this happens the tach just drops to idle

 

Which plug was it on yours that looked burned?

 

Maf sensor

 

So that's another thing that's the same on mine. I think maybe I'll swap that out and see if anything improves.