Well I was going to use one of my friends fpr but I decided against it nad just put a new one on it from Chevy Dealer...$350

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What else could it be? I have tried everything that anyone has come up with except the pump...

 

hmm

 

Humm...Well, let me know if you come up with anything else to check before I replaced the CP3.

 

OKay guys I have not yet pump a pump on the truck but I did disconnect the regulator to see what would happen. With it disconnected the motor would not rev over 2000rpms. I did not have a tech II with me to check pressure nor codes. But it would not rev over the 2000rpms. What is this telling me?

 

probably engine limp mode, the engine realizes that i cant make the rail pressure commanded and it goes into an engine limp to protect itself limiting you to 2000rpms

 

So disconnecting the regulator doesn't really tell me anything? I thot you had told me the pressure would go to 23000psi all the time if it was disconnected? And if it does, the electricly everthing is good? What if I disconnect the regulator and connect it to the old one and just lay it there, what shOuld I see then when I drive it? If n change the pump is forsure bad then?

 

inside the regulator is like a little solenoid, and when you disconnect it the spring inside it defaults it back to its max flow position, and if the pump is good (being that you have a brand new regulator) it will pump the maximum amount of fuel and ~23kpsi will be your pressure.

 

What is the link for the CP3 Fuel pump replacement that has the list of gaskets and everything I will need to go back together? I seen it one time before but I can not find it now that I need it.

 

I never actually did a complete write up on how to do it, but the stuff is still fresh in my head and i do have some pics in my photobucket.

http://s219.photobucket.com/albums/cc9/2500heavyduty/DIY/cp3%20replacement/
The password is "daniel"


The first 5 pics probaby help you the most when you get down to the cp3, you have to walk it out with two screwdrivers and then grab it from the bottom and roll it up and out.

 

idk why it gives you a video, just click the url on top of the box