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Re: to pass a smog test
Well high HC is unburned fuel or oil. I had the same problem in my 92 1500 5.0L truck. When was the last time it had a full tuneup??? I would look at changing the cap, rotor, plug wires, plugs, PCV , airfilter, fuel filter, and O2 sensor. EGR should be Ok, has to deal more with high NOx emmissions. Thats the route i would go. Best part was replacing all those parts only cost me about 100 bucks. Worst part was that wasnt enough, i had to replace the cat too. ( then again, mine failed really bad)
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