My 2004 Honda S2000 with only 44,000 miles on it failed the emission test to renew my license plates. At the test station, they give you a pamphlet "Fail & Repair Guide" that lists repair facilities by city. There were 11 listed for Littleton, but they recommend that you take you vehicle to one of the top 3 listed - Jeno's was way down the list, but the most convenient for me - so I took it there. According to Kris they do this type of diagnostic work all of the time and are well prepared to solve the problems. John was the technician, who diagnosed and solved my problem (a couple of fouled spark plugs causing a substantial increase in hydrocarbons). Thanks to John for solving my problem and making sure that the car passed the emissions test. Great Job, Guys !!