Quote:
Originally Posted by jay71
... I have relatively new GHL headers w/heat (approx 4000 miles on new headers) and I'm starting to wonder if I have a crack or something that is allowing gas fumes from the exhaust to leak into the heater boxes & cabin.
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Check your headers for cracks. Usually between heat boxes and pipes. CO is odorless. Unburned fuel (due to AFR of 10:1) is fortunately easier to detect with your nose. You might have exhaust leak but be able not smell it until it's pig-rich.
