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View Full Version : LS3 misfire ,breaking up, from 2500 rpm to 3800 rpm



ProBell
05-26-2013, 05:46 PM
I just put a new lS3 525 gm crate motor in my car. It had a 04 GTO LS1 in it before using 99 camaro wiring and computer. I was hoping to just run the car for 500 miles before it hit the Dyno for a final tune.

An recommendations on why it would break up when excelerating easily from 2500 rpm to 3800 rpm? It is fine after that.
I do not want to hurt the new motor. I am using the lingenfelter box to make up for the reluctor wheel.
Thanks Randy