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FAST LSXRT intake and FAST fuel rail leaking!

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Old Aug 11, 2013 | 12:26 PM
  #1  
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Default FAST LSXRT intake and FAST fuel rail leaking!

Hey guys,

Not sure I'm in the right section anyways I recently purchased a Fast LSXRT 102 mm intake along with the matching fuel rail for my 2011 GMC Sierra 5.3. First time I installed it everything was fine until I got home, that's when I noticed a strong smell of gasoline. I quickly shut the car off and after fiddling around noticed that the injector on the driver side, closest to the windshield was leaking. Long story short, I tried replacing the washers with smaller ones, it worked for a bit but leaked again, I tried a couple of different o-rings all led to the same result with the same injector leaking. However, in the end we removed the washers completely, lubed the o-rings pretty good and put everything back together. So far everything is going well. What do you guys think the problem is? Any input will be massively appreciated. Especially with all this money spent
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Old Aug 22, 2013 | 11:32 AM
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I had the same problem with that setup on my LS7, the #2 and #7 injector were pissing fuel. Shimmed the injector up into the rail with some stainless washers, so far so good. You would figure for the money spent everything should work together out of the box.
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Old Aug 23, 2013 | 03:35 PM
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Good luck. I know of at least one local that had an engine fire because of the fast rails. I would look at getting some different rails that have better hold down brackets.
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