Originally Posted By: Colt45ws
Yes, and he stated he had a 2002 Buick. Hmm, what kind of fueling system does that have? Dont know what you mean by to a point. If the O2 sensor reads rich it pulls fuel the next cycle. If it reads lean it adds fuel. Either it is correct or it adjusts. If it goes out of its adjustment capabilities, it pops a code and lights the infamous check engine light.
That's exactly what I meant without going into detail....the computer and O2s can only do so much before they "throw in the towel" and trip the CEL.
Yes, and he stated he had a 2002 Buick. Hmm, what kind of fueling system does that have? Dont know what you mean by to a point. If the O2 sensor reads rich it pulls fuel the next cycle. If it reads lean it adds fuel. Either it is correct or it adjusts. If it goes out of its adjustment capabilities, it pops a code and lights the infamous check engine light.
That's exactly what I meant without going into detail....the computer and O2s can only do so much before they "throw in the towel" and trip the CEL.