LB7: PLEASE HELP ME i have no clue LB7

[cottoneyejoe0555]

it all started the evening of the 26th the truck started and after 5 sec it quit but after pumping the primer on top of the fuel filter till i could not push is anymore the truck fired up and never missed a beat. now it did it again the morning and evening of the 27th whats going on with it. the truck has afe intake, and edge juiced with attitude please help

 

[RPM Motorsports]

How cold is it?

 

[WisconsinHick1]

Sounds like you either have a leak in the fuel system and its not holding vaccum or your fuel filter head needs to be rebuilt because its not holding its prime.

 

[cottoneyejoe0555]

i live in western ny and it has not been over 32 the last week and last night was 18, i put power service fuel treatment (the gray bottle)

 

[Alliance1289]

Still using plastic bleeder screw?

 

[Fastorange]

when was the last time you changed your fuel filter? is there a plastic type filter on it or a metal one... some places like napa sell a platic type that doesnt work so well

 

[cottoneyejoe0555]

yea still plastic screw, and yea stupid me yea i used a napa plastic filter cuz i ran out of my steel baldwin filters, but the filter has been on the truck for 5000 miles

 

[Dragonsfireloki]

There is also a possibility of your o-rings in the filter head or the bleeder screw o-ring being wore out.

 

[chevyburnout1]

I would probably replace the filter and rebuild the filter head.

 

[diesel53]

we have an lbZ doing the same thing, but how could the filter head wear out over 8 filter changes? What is there to wear out? The pumper?

Could it be a weak cp3?

 

[chevyburnout1]

There are about five areas in the filter head that can leak air in when under the normal vacuum. A partially clogged up fuel filter will emphasize the air leaks as there will be more vacuum.

 

[McRat]

This is another reason to run a lift pump. You can troubleshoot easier.

 

[diesel53]

How hard is it to rebuild or just do away with the factory head set-up? Seems like it maybe easier to get rid of it and run an airdog.

 

[JDPlowboy]

Rebuild kit http://www.merchant-automotive.com/deluxeduramaxfuelfilterheadrebuildkit.aspx

It's fairly easy. I've done one for a friend. Also Installed an air dog for another one to delete the factory setup for same problem Just un bolt factory filter and loop the inlet and outlet lines together with a hose. Air dog costs much more but if you could afford it it would be the easiest, plus your feeding your cp3 then instead of it sucking. And better filtration. That's just my opinion


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