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Discussion Starter · #1 ·
2004.5 Chevy LLY Duramax
2001 GMC LB7 Duramax
My LB7 has a p1093 code, only gets half the frp it should have. No check engine light, just comes up with the code on my edge cts2
 

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Fprv, shim it or get a race plug. Its bleeding off pressure. Whats all done to the truck? If its tuned it needs a lift pump too to prevent this. If it's not throwing a cel I would guess its tuned and the tuner turned it off in efi to prevent it from limping.
 

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Welcome aboard.
 

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Welcome to the DF!
 
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