Injection pump uninstall/install - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 09-06-2012, 06:39 PM   eBay Motors  #1 (permalink)
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Injection pump uninstall/install

2002 GMC Duramax.

I have moderate skills, mechanic wise.

Regarding the injection pump, I would like to replace mine. I hear getting air into the fuel management is disastrous.

Is there any links to videos on how to replace an injection pump for my year duramax, or any links here so I can gauge whether or not I can manage the job?

Also, any reference on the best prices on where to buy an injection pump. I want to keep it simple with no mods.

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Old 09-06-2012, 06:52 PM   eBay Motors  #2 (permalink)
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What kind of pressure do you have? I think they are around $700 from RockAuto Auto Parts you may want to be sure you need it first
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Old 09-06-2012, 07:13 PM   eBay Motors  #3 (permalink)
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Whats is currently wrong with yours?
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Old 09-06-2012, 07:55 PM   eBay Motors  #4 (permalink)
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My truck is throwing code 1093. Currently, it is only throwing the code when climbing steeper inclines on the interstates.

I had 4 injectorS on driver side replaced 3 months ago. Passenger side injectors are all good. I have not had truck analyzed. Truck has 294,000 miles
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Old 09-07-2012, 05:05 AM   eBay Motors  #5 (permalink)
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Its a good possibility that the cp3 is slowing down, but, I would scan the cp3 with a tech 2 or someone around you with efilive and see how well the cp3 will keep up. If you command mazx rail rpessure at idle (160mpA) and the cp3 will hold it, the cp3 isnt your problem. But if it doesnt hold it, it very well could be your problem.

When was the last time you changed your fuel filter?
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Old 09-07-2012, 03:06 PM   eBay Motors  #6 (permalink)
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I changed the fuel filter 3 weeks ago. The code started throwing some 2 weeks before that. I thought that the filter may have been the issue.
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Old 09-07-2012, 03:34 PM   eBay Motors  #7 (permalink)
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You might check for soft fuel lines may be sucking shut on long climbs.
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Old 09-07-2012, 04:36 PM   eBay Motors  #8 (permalink)
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Would this line be near the injector pump?
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Old 09-07-2012, 05:22 PM   eBay Motors  #9 (permalink)
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http://www.thedieselgarage.com/forum...ead.php?t=1113. Check that thread for how to replace cp3, its not for the faint of heart lol. Btw just replaced mine,bought mine from sinister diesel for a pretty fair price. Definately want to confirm that it is truly bad. I had mine checked at gm for $60 and made them show me the results.
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Old 09-07-2012, 05:27 PM   eBay Motors  #10 (permalink)
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Here is the repair I wrote up when I fixed my fuel lines. It is on the dieselplace website. Doesn't really matter whether it is close to the CP3 or not. The ones underneath the truck will affect the fuel the CP3 can pull from the tank just the same.

DIY: Collapsed/Kinked Fuel Line repair - Diesel Place : Chevrolet and GMC Diesel Truck Forums
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