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Any idea why the HC is high at 15mph? I just did the street RV head and 261c cam myself but haven't been smogged yet.


Sorry it took me a while to read your question correctly. The HC is high because the idle mix is set too lean. Rich would be high HC and high CO. I still don't fully understand the method for setting the mix without an EGA, but I've got it running pretty well I think. Good enough to pass anyway.

My Truck: 1987 XtraCab DLX 22R 4WD 5 Speed Manual
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"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." -Jeremy Clarkson