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International Automotive Technicians Network
Re: ILLINOIS MAY DROP IM240 TESTING
Posted to Emissions Forum on 4/12/2006 3 Replies

Hi Phil,

Illinois has had centralized testing since 1986. Back then it was idle or 2 speed idle so if it wasn't misfiring you could tune the carb and it was an easy pass. We never put catalysts on cars back then.

So in 2002 or so the state began IM240 and ... Login to read more.

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