FAIL COLORADO EMISSION TEST
Hello everyone, My 1988 winnebego cheiftan will not pass emission testing. we have alread changed wire, spark plugs, oil change ,air filter, air in coach and tires. I even went and got that stuff...
Forum Discussion
Have you changed the 02 sensor? I would almost bet that's your problem and it will have more power and better mileage after you replace it. The last one I bought for that era of GM product was only $23.
