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Fuel
How can you tell if the AFR is bad or going bad, My car runs in he lean all the time--The tail pipes never get dark color they stay a rusty color and my bumper has this flim from the exhaust, It runs great other then that but this has been doing it since i found the hiccup problem which was a plug. 3months now for sure and i think if it goes on i am going to melt down the engine..I don't drive city, all highway miles. I have change MAF and coils all new, plugs are correct heat range. I get about 23 to 25 mpg,
Thanks anyone for help.
Art,
PS: if it is the AFR how to do it.
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