Quote:
Originally Posted by 68GMCCustom
if you've never cleaned the throttle body (and behind the throttle plate) on one of these LSx motors after 15k-25k miles or so.... you'll find lots of black soot all over the back. There's no fuel or coolant....and not supposed to be anything but air in one of these intakes? Surprise! Its pulling oil residue from the pcv (and who knows where else).
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Good info, thanks. Any idea what might be causing my lean codes? I am thinking about getting a steam iron and see if I can see anywhere that the intake might be leaking.