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  1. Mustang EcoBoost Maintenance
    Every about 20 to 30 seconds my afr jumps up to around 15 at idle. Is this something to be concerned about? I have changed the fuel sensor and purge valve.
  2. EcoBoost Exhaust Options
    So I have had the car for about 2 years now and bought it modified. Cold air intake, 3 inch downpipe with flowmasters, and what looks like a C&L bypass valve. Its tuned on a Bama X4. It has a CEL P0420 cuz of the high flow downpipe but has always ran fine with it. AFR would stick to 14.0 -14.1...
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