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L99 popping

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Jun 28, 2019 | 11:49 PM

#1

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Staging Lane

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L99 popping

I have a l99 swapped on a 04 Silverado 4 door, been running perfect and out of know where started to pop while ime driving, mainly in the hwy, only once on street. It will pop and bog down bad, won’t let me give it gas and then shuts off, I turn it back on and works normal, does it every know and then but more when I’m wot, any reason why it could be?
motor is heads, cam, tbss intake, 4l80 on a triple disk 3600 turbo stall.

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Jun 29, 2019 | 12:01 AM

#2

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From: Houston

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Sounds like severe knock from detonation to me

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Jun 29, 2019 | 12:22 AM

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Staging Lane

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Quote:

Originally Posted by MY_2K_Z

Sounds like severe knock from detonation to me

Just tried it out right now driving normal, did it twice once I hit 80mph

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Jun 29, 2019 | 01:06 AM

#4

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Sounds like low fuel pressure.

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Jun 29, 2019 | 01:08 PM

#5

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Staging Lane

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That’s the a/f at idle seams a little lean

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