| So I tried some fuel additive (diesel power - diesel kleen from Walmart) and found that the idle variation seems to have gotten quite a bit better. I also tried to really lay into the accelerator on a commute to work (usually the truck sits and I drive my Escort).
Went back for a test today and scored a 34.4% out of the 40% permitted, so I passed on the second time around.
Thanks for the input.
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2001 GMC K2500HD ExCab Dmax/Allison - 100% stock 152k mi |