GN usually passes easily. 2 years ago with bad heads (they were seeping coolant) it passed at 11HC of 200 at high, and 28 of 200 at 2500rpm. I've replaced the heads since then, and of course new HG's and intake gaskets. Using an emissions chip, 2 gallons of e85, temp was around 200°, it failed idle test, 399 of 200 and 2500rpm was up also at 64. Cat is only used for emissions tests. The mechanic let me mess with some things after it failed with the machine on monitor. Turned the FP way down, retarded timing an additional 4° on the translator and also leaned out the base fuel. It really didn't make much difference. Going to change the plugs and clean the MAF, but seems like everything else is the same as it was 2 years ago. I don't have a egr, but the local test doesn't require it. Any ideas?