Engine/Transmission (1994 - 1998) P7100 high speed screw

[PKemp]

Here is something new. When you take your foot off the throttle the linkage arm rests against the idle speed screw adjust. Okay but i've been told that when you turn the arm full throttle (by hand) the top of the arm comes to rest near the pumps "high speed" adjust... . ??!! There is a screw adjust right there that seems to be covered by an aluminum or plastic cover that is designed to keep people from messing with a screw underneath. Wellllllllll, underneath "my" sort of aluminum "peened" over "tamper proof" seal there is (low and behold) a jam nut and a screw!!! I've been told by a reputable and successful I might add, pump mechanic, that if you undue the jam nut and turn the screw all the way in it affects your governor control and that your rpms can go all the way up to about 3200 to 3400 rpms without having to replace the governor springs/assembly with a 3k GSK ... .....

I was agahst, beside myself, all an all... ... ...

Is this true ??????? Can it be ??????

Is anyone knowledgeable about this "adjustment" ????????

 

[MAleksandrowicz]

Some people have reported that after a high rpm run the truck won't idle correctly. I have left mine alone.

 

[bdcraig]

Back many years ago before I did my own mechanic work I had my truck at Jim Jessup's. I asked him to give me more RPM so it would not drop as much while shifting gears under a load. He adjusted something on the pump and said it was good to about 3200. Not sure what he adjusted but it would hit 3200. It still did not pull at that RPM like the 3gsk does. Not sure if it is the same jam nut and screw as you are talking about.



Brian

 

[Highfinance97]

My screw fell out in mine and now i have no fuel at "full throttle"



here is my threadNo fuel at WOT!!!!

found the problem in post #27



Michael

 

[WestonsssDiesel]

Yes is will make it rev higher but will not give it any fuel at those rpm's thats what the governor spring kit is for.