lmm injector problems
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5,569 Posts
How did they fail? What are the failure symptoms that your truck is showing? Need more info!!
i took of from a stop light and when i reached between 100- 120 i noticed it went from heavy black smoke which was normal to whitesmoke i limped it home and it was missing on one cylinder, my edge insight said that i had low fuel rail presure and was missing on #2 cylinder.
the tip of the injector on that cylinder blew off and had cracked the piston strait across the middle.
the tip of the injector on that cylinder blew off and had cracked the piston strait across the middle.
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5,569 Posts
Wow that sucks
You really did not to expect Gm would not pay for it with the mods done to the truck, that you have posted in your sig did you
You really did not to expect Gm would not pay for it with the mods done to the truck, that you have posted in your sig did you
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101 Posts
I'm guessing your performance programming changes voided GM warranty - it records all in the computer even if change back to stock before going to the dealer.
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9,706 Posts
So tell me again why this is GM's fault, and why they should pay for it? You put a programmer on your truck and were going well above what the truck is governed at, so how is it GM's fault?
I can't understand why you'd even try to have GM fix it under warranty.
You're probably lucky that it wasn't a tire that blew. 37's and 120mph don't mix. I'd bet those tires aren't even rated for 90mph. That injector might have saved your life!
Bottom line, you and everyone else knows that any programmer will void your warranty. You put one on, and broke your truck, so you have to fix it. Pretty simple. Whining that GM didn't pay for it for you will fall on deaf ears.
Ask anyone who has ever broken anything and they'll tell you. You have to pay to play. :read
And as to your question, I've never heard of any troubles with LMM injectors, your case sounds like a freak incidence. although the mp8 is a pressure box which doesn't help things.
I can't understand why you'd even try to have GM fix it under warranty.
You're probably lucky that it wasn't a tire that blew. 37's and 120mph don't mix. I'd bet those tires aren't even rated for 90mph. That injector might have saved your life!
Bottom line, you and everyone else knows that any programmer will void your warranty. You put one on, and broke your truck, so you have to fix it. Pretty simple. Whining that GM didn't pay for it for you will fall on deaf ears.
Ask anyone who has ever broken anything and they'll tell you. You have to pay to play. :read
And as to your question, I've never heard of any troubles with LMM injectors, your case sounds like a freak incidence. although the mp8 is a pressure box which doesn't help things.
what i was askin is "has anyone else had a problem with they're injectors on an lmm" the problem i have with gm is that when my tc was burning up and i asked them to help prior to the performance mods they replied with tuff luck and that is they're fault and as far as the motor and trans i fixed them both myself. and i've been 135 on 37 mudgrapplers.
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11,080 Posts
i bet the piston cracked before the injector had a problem.
i hope you didnt just put another stock piston in and bore it out...cause well frankly lmm pistons blow
i hope you didnt just put another stock piston in and bore it out...cause well frankly lmm pistons blow
they pulled the piston and injector and replaced them, the cylinder walls were not harmed at all and the trans is getting some more upgrades. total bill motor 4k and trans is around 4500
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11,080 Posts
are they sure the walls were fine? ive heard from many builders and all of the have said that they have never seen an engine with a cracked piston have not have to be bored out...
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11,080 Posts
yea thats usually how they look..except for some that get a nice hole in the middle lol
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1,984 Posts
are all you running is the 2 tuners stacked?
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