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good read but this part "One final point - running a computer managed engine at 165°F compared to the factory 210°F will often cost you as much as 4 MPG. The reason for this is that the computer thinks that the engine is not off the “choke cycle” and it is still putting out a rich mixture!" is complete bs in all vehicles I've ever tuned. Most tunes command that if the iat temp is over 14*F and the ECT is over 92*F the car will go into closed loop which commands 14.6-14.7:1 a/f ratio.
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