Cv713 intermittent dead pedal

[Orange cv713]

So my truck has a intermittent dead fuel pedal it is a 2007 cv713 I understand having the software updated to step 12b could resolve this but I called my local mack dealer and they act like im speaking Chinese but is there anything else that could solve this issue 

[70mackMB]

l drove a CH yet older with a similar problem. Turned out to be the throttle position switch under the pedal. Of all the places to put a switch like that!    .....Hippy  

[Joey Mack]

Are you getting a throttle pedal code ? I think its 6-5.  And yes, the TPS on the pedal can be the issue.

[Orange cv713]

3 hours ago, Joey Mack said:

Are you getting a throttle pedal code ? I think its 6-5.  And yes, the TPS on the pedal can be the issue.

No I haven't I get a eup 4 code every now and then when its cold but goes away at operating temp but a month or so ago the engine was hanging in the rpms to the point it was hard to shift but was intermittent I sprayed some lube on the bottom of the pedal and it went away but it has always had the dead pedal issue it dont completely go away when it happens but its like you are holding at half throttle and some times it last longer than others some tims its back to back some days it may only happen once or twice