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Originally Posted by ImGone92
II am running cobb stage2+ aggressive, fbo stock exhaust for now, I ran 2 gallons of e85 on a half tank, car pulled pretty good ...day after my car shut off on me and threw a code for fuel pressure plausibility. I cleared the code twice and juss bearly made it home. my question is, with cobb how do u get maps to run e85? Or do I need you to tune it on e85 BQ?
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If your fueling is not tuned for the % amount of added E85 yes it will throw a code and you will get a CEL
You were runing the wrong map for the fuel you added. 2 gals of E85 to a half tank is almost E30. In Florida expecially Shell E85 has been tested to be E90.
Your fuel trims were more likely maxing out that threw a code followed by a CEL
Edit: Here is a site to tell you how much E85 your mixing
http://e85prices.com/milesperdollar.htm (last table on this site) . You can added up to E20 on the COBB OTS anything more than that will aventually max out your fueling trims and throw a CEL