Went to the New Jersey DMV testing center and failed for the second time. Here's the test results:

Test|Standard|Reading|Result
HC|100|199|FAIL
CO%|0.50|1.40|FAIL
CO2%|--|13.6|--

and the test was only a 2500 RPM test (2362 RPM actual). I had the car in the indy shop around the corner from me. The guy claimed that the engine is "tired". He mentioned that two of six cylinders had low compression. I'm a little surprised at that since there's only 128k miles on the odometer. The mechanic also mentioned that he could get the emissions to be within spec at idle but not at 2500 RPM. Judging from some other emissions posts here it seems that the catalytic may need to be replaced. What do you think? For starters, I'm going to replace the sparc plugs with new copper champion ones (NAPA didn't have the Bosch ones) and run through a tank of gas with Techron fuel injector cleaner. Replacing the catalytic may be a little over my head (I'm a newbie DIYer) but could attempt it with two more jackstands perhaps. Am also on the lookout for a good MB mecanic in the northern NJ area.