Uncontrolled accereration

[ScottBrown]

The othe day I was traveling down a dirt road in 2nd gear and shifted into 3rd let out the clutch and the truck accelerated on its own , the cruise control was not on. I went to the dealer and asked off the record if anyone had a similar problem as I just had. He said that was strange that on the counter he had paperwork for the same problem with the same year and it was also on a 3500 truck, only thing was different was this truck was gasoline. they could not duplicate the problem and changed out the Computer.

I have done a search and found 3 posts on uncontrolled acceleration, but they were using the cruise control. I got the early reflash on this in March 03. Truck was built in 11/02. I have not got back to the dealer to find out if this corrected the problem on the truck with the new computer.

 

[amsoilman]

How fast were you traveling, and how much speed did you gain? Mine will do this, but only if I am going slow, and the speed I gain is very minimal. It is the computer that is doing it. I can be at a stop and without giving any go pedal, just let out the clutch, it will take off and accelerate, but only a bit.



Wayne

amsoilman

 

[rashwor]

Wayne,



Yours is working correctly... that is the beauty of an electronically controlled govornor. Both my '99 and my '05 do it and I love it. I don't know if that it what the other poster experienced or not.

 

[RonsRig]

If you let your rpm's drop too low, the computer will try to accellerate up to a point where it thinks it has enough oil pressure. If you keep your rpms above 1000, you probably won't notice it as much.

 

[daytripper63]

When mine does it, it will slowly run up to about 2600 rpm

A few times it cought me by surprise and almost rear ended someone

 

[ScottBrown]

Yes the RPMs were low about 1300 when I shifted Computer ran it up to 2000 then stopped.

 

[Summit]

all 6-speeds built before dec 31st 03 do this and there is no fix. its the anti fueling feature in the ecm that has a programing flaw, when the rpm's come back above idle the ecm doesnt realize it and keeps fueling just like you hit the resume button on the cruise.