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Stay away from Bosch, AC Delco, ect.
We used to have a PILE of plugs from cars at work that had driveability problems solved by replacing the plugs with Denso. We don't use NGK because Denso is the OEM supplier [I work at a dealership] but they are just as good.
Your EGR has NOTHING to do with HC emissions. It deals soley with NOx.
If your HC is high, you are most likely running rich.
Also, oil in the combustion chamber CAN cause high HCs. Not gauranteed, but possible.
You mentinoned something else was high too, what was it?
One cheap possible solution is to run several cans of seafoam through the engine.
I wouldn't worry about the oil, just the intake and gas tank. Run a whole can through each.
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92 Alltrac, 85 PU
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