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Re: Mike's 50
The high fuel pressure could be a lot of it. The spec is about 60psi. solidaxel is right about what GM says in the instructions. I talked with GM tech support and their recommendation is to have at least 10 to 12 inches of straight pipe after the MAF sensor and the sensor needs to be installed in the top of the pipe. I would recommend moving your sensor closer to the air filter.
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