2011 2500hd replaced cp4 and still won't start!!!

[laroche904]

i replaced the cp4 pump on this truck and went to start it and it just turns over and will not start. I'm getting 4 codes p2002, p2453, p11db, p128e

info on truck: 2011 2500hd 150,xxx miles
replaced pump and timed it correctly
cleaned entire fuel system
charged batteries and it still won't fire

any help would be much appreciated

 

[Digmax]

Rail pressure while cranking?

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[laroche904]

i honestly don't know, i was just told that i needed a scan tool to check rail pressure? is that correct, and if so what kind of scan tool?

 

[Digmax]

An edge cts will, a flash scan v2 will also.... you never mentioned changing injectors, I'm sure you did

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[laroche904]

never replaced injectors, spoke to local diesel shop and was told to replace pump and clean rest of fuel system. then put it back together and see if it would throw a misfire

 

[Tothemax]

did the pump explode? if so your going to need a lot more parts

 

[laroche904]

one of the pistons in the pump seized up

 

[Digmax]

Well you get to start over sound like..... and reeeeeealy start spending da money

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[Hoffie]

Did you replace the cp4 with a new one or did you convert it over to the cp3? Online the cp3 conversion is within $200 of the cp4. If you have been following my LML dilemma, (Help!!! won't start and no codes) I am almost in the same boat as you. So far, I have not lost my cp4 and injectors but I have had everything go wrong. You primed the system? And it built up pressure while pumping the primer?

 

[laroche904]

The old pump was toast, I got a brand new cp4 for $540 directly from Chevy.

 

[Hoffie]

Was that the online price or in-store price? I have looked online at GM parts and they do not show a part number for them. I usually buy my parts from them online because of the huge savings.

 

[laroche904]

that was the price in store

 

[laroche904]

a random question, when i try to erase the codes they imediatley pop back up. if the eco has the p0128e code stored, would that cause the no start

 

[Steve404us]

Following

 

[elliottw]

You timed the pump I'm assuming?

 

[RPM Motorsports]

You sure you have the two plugs on the Cp4 in the correct order? The regulator will swap with the temp.

 

[c20elephant]

Was that the online price or in-store price? I have looked online at GM parts and they do not show a part number for them. I usually buy my parts from them online because of the huge savings.

My local dealer sell parts to me equal to online pricing. When I pay the tax it's just a few dollars difference than paying shipping and I can call and place my order and not pay till I pick it up, MAP pricing comes into play and I have a cash account setup........:thumb:

 

[Duramaxduner]

gonna need injectors before she starts.