Quote:
Originally Posted by BR3W CITY
Interesting train of thought. He's running the GM hot cam from what I understand....I wonder if its throwing false KR from the lope of the cam and limping the car?
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A cam won't register KR, it will register misfires but that is an easy fix.
If the tuner played with the timing tables without running the scanner that's playing russian roulette with someone else's motor.
Excessive KR won't put you into limp home mode, it will put you into buy pistons or headgaskets mode.
I don't usually point fingers at the tuner but this is a case where the tuner didn't adequately do their job. Pure and simple.
With that cam it's going to have different idle/off idle air requirements than it did with the stock cam. DBW motors are super simple to tune idle quality on, it's the off idle transition that is trickier but not that difficult.
I could go on but in the end, OP needs to find a new tuner.