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Please help, My car won't pass smog in California!!!!
5.0L (1979-1995) MustangTechnical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.
put everything back to stock. just telling us your car won't pass gives us absolutely no idea on what might be the problem. Knowing CA it could be any of 1000 things.
Sorry, first of all I just bought the car. It has "high flow" cats on it according to the previous r/o. I looked and it does have cats, but the guy at the smog shop said there should be 4 and there are only 2, so it failed the visual inspection for that. Then it says "Ignition Timing: 20 BTDC FAIL". Then under the ASM Emission Test section, in the CO % section it failed at both 15 mph and 25 mph.