Here are 3 suggestions. Drain the gas and refill with a different brand of fresh HIGH octane. The other is to check that the motor is not running too hot. You might need a new thermostat and or a new otterstadt switch. You can also check the timming and the mechanical and vacuum advance that everything is set up and working correctly. DO NOT mess with the mixture screw. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "George Ryerson" <TRyerson@xxxx> wrote: > Hi All, > > I have a yellow painted '83 in Akron Ohio and ran into some problems last > Friday when trying to get through the emissions testing in Akron. In > previous tests since 1997, when I bought the car, it passed with flying > colors. This time though apparently the Ohio tests now include NO ( nitrogen > oxides ) testing which my car failed with a reading of 1650 against a max . > > As always thanks in advance to the list. > > George Ryerson