I am the new person in question here. Thanks Adventure for passing this question onto the community. Clarifying these questions, it is the HC which read 300 ppm at idle, and 166 ppm at 2500 RPM. Additionally, the CO% is a bit high, 0.63 and 0.74%, respectively. This suggests there is incomplete burning of fuel, so Fairfax you may be right.
I have put Seafoam in the fuel line, in the crankcase, and also applied it to do "top end cleaning" as I've heard it called. The latter would seem to clean out the PCV valve, right? Either way a whole lot of gunk was vaporized out of the system when I did the last stage of Seafoaming, as shown by the huge clouds of crap spout from the exhaust.
In addition to this I will try adding acetone to premium gas to have it run cleaner before I take it in next time for smog.
Any other additions are most welcome.
