2014 International Prostar - Accelerator Pedal Issue

[Rawze]

It could be simply tarnished fuses in the fuse cluster, even though they may all still perfectly check good. .. this is a common problem with Prostars that cause ghost issues.. including accel and other electrical related things. here is some info related to this...
http://rawze.com/forums/showthread.php?t...1#pid12861

It could be a cab-harness connector problem too. If moisture has gotten into the plugs that go into the firewall, it can cause what your describing.

Also, there are different model accelerator pedals for the prostars too.. Could be that someone replaced it and used the wrong type.

One nice thing is that all the wiring diagrams for Prostars and lonestars is FREE and public information on Navistars own website. It being a 2014 model ... Be sure to choose the document for "ProStar and LoneStar Built June 14, 2010 and After" ...
ref: http://bodybuilder.navistar.com/General/BBcircuitIX.htm


Lastly...
Prostars are also known to leak around the top where the upper dome attaches to the cab. Sometimes the water runs thru the wiring harnesses and into the cab controller on the drivers inside. Here is some related info on that...
http://rawze.com/forums/showthread.php?t...2#pid16882

-- Maybe this helps point you in the right direction.