Lly with LBZ heads and injectors

[YoungGunDiesel]

Hi all, I'm looking to buy a duramax local to me but it has injector issues the guy claims. Long story short is its a 2006 LLY but he melted down a piston when the LLY injectors failed and he put a LBZ crank and pistons in the LLY block and the LLY heads where cracked from the melt down so he put LBZ heads on it with LBZ injectors. Now as it sits it runs horribly rough and he claims the injectors need to be programmed. He claimed he had two of them tuned/programmed but numbers 5/7 also need to be fixed for the truck to be running well.

What does he mean by "programmed" and how are LBZ injectors possible on a LLY computer system?

Is this all hog wash? Is it fixable? Is it expensive?

Thank,you

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[TROJAN366]

a 2006 "LLY" is an LBZ with a different tune file in it. If he swapped LBZ parts onto the motor it should run exactly the same as it did before it broke.

EDIT: I wouldn't buy anything from someone who works on their own stuff but doesn't know what an 06 "LLY" is.

 

[PureHybrid]

Anything is fixable. He probably put junk injectors in it. 100% of the time if it's a "small easy fix" but they can't find the time to do so, it's NOT an easy fix.

 

[YoungGunDiesel]

I feel stupid myself for not looking into the whole 2006 LLY/LBZ thing before posting, so I guess that just leaves me with the question of what did he mean by he had the injectors tuned/programmed and it needs 2 more tuned programmed?

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[zakkb787]

Never heard of programming an injector personally. If you go look at it you need some sort of scan tool that is quality enough to read engine codes, injector rail pressure, and actual vs desired rail pressure to start with and go from there. But from the sound of it, unless it's just an amazing deal you know you won't lose any money on. R. U. N.

 

[Chevy1925]

Never heard of programming an injector personally. If you go look at it you need some sort of scan tool that is quality enough to read engine codes, injector rail pressure, and actual vs desired rail pressure to start with and go from there. But from the sound of it, unless it's just an amazing deal you know you won't lose any money on. R. U. N.

Lbz and up can have injector numbers plugged into the tune

 

[zakkb787]

Lbz and up can have injector numbers plugged into the tune

"The more you know" thanks lolstill sounds kinda sketchy. If that's all it is then why not fix it before he sells and get more money

 

[ikeG]

The injector numbers do not need to be programmed for it to run, or even at all in my experience.

 

[PureHybrid]

They're called trim codes. And no, they don't really need to be programmed if the injectors are changed for it to run right. Now if someone tried to update the trim code and screwed it up, then it would need fixed. At that point just program them all to the same number, it'll still run normal.

 

[YoungGunDiesel]

They're called trim codes. And no, they don't really need to be programmed if the injectors are changed for it to run right. Now if someone tried to update the trim code and screwed it up, then it would need fixed. At that point just program them all to the same number, it'll still run normal.

This is all new to me so I'm not sure what my approach should be. But the truck is cheap enough where a set of injectors would fit my budget but I'd personally like to get lucky and just have to "program" the injectors if the current injectors are fine but it seems like its a big mess that new injectors would be the most straight forward solution. And it has a banks 6 position tuner. Not sure if thats also what is messing it up. Dunno.

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[TROJAN366]

This is all new to me so I'm not sure what my approach should be. But the truck is cheap enough where a set of injectors would fit my budget but I'd personally like to get lucky and just have to "program" the injectors if the current injectors are fine but it seems like its a big mess that new injectors would be the most straight forward solution. And it has a banks 6 position tuner. Not sure if thats also what is messing it up. Dunno.

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The problem is that you don;t actually know what the problem is. If the fix was that simple why would he be selling the truck in poor working condition for short money?? If it was actually that simple he would fix it and ask top dollar.

 

[YoungGunDiesel]

The problem is that you don;t actually know what the problem is. If the fix was that simple why would he be selling the truck in poor working condition for short money?? If it was actually that simple he would fix it and ask top dollar.

Very valid point. I think ill walk on this one then.

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[zakkb787]

The problem is that you don;t actually know what the problem is. If the fix was that simple why would he be selling the truck in poor working condition for short money?? If it was actually that simple he would fix it and ask top dollar.

My thoughts exactly. It sounds like there's a much bigger issue that he's lying and trying to mask. Remember he's apparently blew one motor and tried to fix it and make it work and it's still not. If it's running terrible and he's blaming it in 2 cylinders injectors it could even be no compression. Really anything. It sounds pretty sketchy

 

[YoungGunDiesel]

Well i appricate all your info and time on this discussion and ill be take your advice. And walking away on this one. Thank you

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