LB7 Cranks but wont start - Page 2 - 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 12-12-2012, 09:29 PM   eBay Motors  #11 (permalink)
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if you know its from the filter housing, just delete it and put in the airdog. Will filter better anyways. Dont worry about being new to diesels. Knowledge comes with time and experience. Stay on here and you will figure it all out in no time. If you need anything let me know.

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Old 12-12-2012, 09:29 PM   eBay Motors  #12 (permalink)
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Diesels are more fun
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Last edited by aturking; 12-12-2012 at 09:33 PM.
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Old 12-12-2012, 11:11 PM   eBay Motors  #13 (permalink)
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Quote:
Originally Posted by JHuber219 View Post
is it pretty easy? Im still pretty new to diesels. They scare me a little bit. And yes this morning i could smell fuel but cant find where its coming from. Im sure its from the filter housing. Just praying I can bypass that with the air dog and it fires right up.
i deleted my stock fuel filter 2 months after i installed my air dog. i think it made alil difference in throttle response because stock fuel filter is pretty restrictive and i think it defeats the purpose of the lift pump to try to push thru that then to CP3 aka injection pump. i also modded the air dog to CAT filter on it. i watch my balance rates alot and it hasnt change one bit since i put the air dog on and that was over year ago.
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Old 12-13-2012, 06:57 AM   eBay Motors  #14 (permalink)
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When you get your air dog it'll come with extra half inch hose. Use that hose to bypass your filter housing. You'll see it's very simple. Just make sure you loop the hose wide enough so it doesn't kink.
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Old 12-13-2012, 04:16 PM   eBay Motors  #15 (permalink)
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Thanks for the advice guys.. Ill post after I get my air dog on and let you know if I had any luck!
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Old 12-16-2012, 08:46 PM   eBay Motors  #16 (permalink)
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Hey Guys, I got my air dog 2 on and my fuel filter bypassed. Wasnt bad at all. BUT! Now the truck will start, but its very inconsistent. Sometimes it fires right up, sometimes it cranks for 10-15 seconds then starts. does start every time. I feel like its lacking some power but of course it may be in my head. Any ideas.
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Old 12-16-2012, 09:46 PM   eBay Motors  #17 (permalink)
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I think you are back to as posted in the beginning. Check your injector balance rates.
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Old 12-17-2012, 07:25 PM   eBay Motors  #18 (permalink)
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As always, check to see what current codes and history codes are showing. You will need a scan tool that reads more than just the basic codes though, like the BCM, PCM, etc. May help point in the right direction. Im facing the same issue and in the service manual I have, the second step mentions codes that lead to the main issue at hand.
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