First post! Nice looking board! Hope someone can help
My car idles fairly smooth, the RPMs are pretty constant but it does sound like its misfiring. I took it in for an emission test the other day and it passed most of the tests but failed badly on HC @ idle. The limit is something like 300 and mine was somewhere around 520. I don't have the results infront of me so I'm just ballparking these numbers. Anyway the problem is unburnt fuel @ idle. So my question is what should I look at replacing/fixing to get this car to pass? Would adjusting the A/F mixture screw on the carb make a big diff? Any idea what could be causing the misfire? I changed the plugs and wires, but that didn't do much it still gargles when idling.
Would replacing the EGR valve help? Or does that just effect the NOx readings?
Any advice would be much appreciated!
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