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P1093: Fuel pressure low during power enhancement
P0087: Fuel rail pressure low

(these are off an LB7 list, but I don't think they changed much for the LLY)

So, what kind of tuner/programmer you using? This is an indication that you are probably using a big tune. It might be time for a lift pump if you want to continue using this tune. Another thing it could be, is a clogged fuel filter, but it could be a long shot if you just changed it. More information on your truck and a signature might help get more replies on that.
 

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im betting a clogged fuel filter.

this happened to me when i had a clogged fuel filter and I accelerated really hard then immediatly let of the accellerator...needless to say I limped the truck home at 10k. A simple fuel filter change and problem solved :)
 

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Maybe i've just had good luck with my fuel system so far. No problems with filters, or anything yet....well except for the sending unit...it's sending the wrong reading very now and then.
 

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how often to you change ur filter dura?
 

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Ain't changed it yet, but planned on it......but i'm also going to be selling it shortly too
 

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how often to you change ur filter dura?
Forgive me, don't know what happened there. Stupid app.

But I change mine every 10K

Okay wow WTF? Replied to the exhaust thread and it post on one 8 years old? Da hell?

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