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I read a previous thread a week or so ago about 99+ Cobra engines running rich, and someone said after a shop tuned it it gained 10-15+ RWHP ?? Anyone know about this and the process to lean it out? I have a 99 Cobra and I do believe mine runs pretty rich.
 

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all cars run differently . the only way to tell is to put it on a wideband and have the A/F curve looked at. Any tuner can lean it out a bit for ya if the curve is a little rich.
 
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