P0446 code help
2003 GMC Sierra 1500 2wd 5.3L
I have a small amount of fuel in the charcoal canister. The vent valve near the charcoal canister I took off and am able to freely blow air through both ways with my mouth. The purge valve on the intake manifold I am able to blow air through one way but not the other. Anybody got suggestions?
The LTFTs are +2.3 on both banks if that matters at all.