Exhaust leak only under load
#1
Exhaust leak only under load
Chasing and exhaust leak that preventing my from getting my tuner finished. 08 Sierra Denali w/ 175k miles, 6.2, ls9 cam, 1.75 stainless headers, 3" stainless y pipe. Can't find even a trace of it at idle even using a hose as a stethoscope. Exhaust shop had no luck either. Not there at idle but can see it intermittently under heavy load in long term fuel trim and hear feel it under drivers floor board. Almost as if it only leaks when engine torques over against motor mounts. Any body seen anything like this before?
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BlackGMC
Tuning, Diagnostics, Electronics, and Wiring
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01-12-2011 07:05 PM