1996 Cobra with a check engine light on. First it was the mass air flow sensor which I replaced. Things were fine for a couple weeks and then the light came on again. Autozone checked it and says the system is too lean but they couldn't help me any further. They suggested to use STP fuel treatment so I ran that through the next two tank fulls. Yes, I am using 93 octane. I bought the cobra in February and from what I can tell it is stock except for the K&N cold air intake and the H pipe Flowmaster exhaust.

How do I make adjustments to the fuel air ratio or get it to run richer?

Thanks,
Stan

 

dyno tune.

 

change 02 sensors check for exhaust leak etc.