Guest sco350 Posted February 7, 2012 Share Posted February 7, 2012 i'm looking to run my j spec up to 17.5 psi and will need the fuel cut defender as it comes in at just over 15 psi. the car was set up by superchip to run just under 15 psi but if i fool the ecu into only seeing 15 psi will the engine be running lean at any boost over 15 ? Quote Link to comment Share on other sites More sharing options...
bigbloodyturbo Posted February 7, 2012 Share Posted February 7, 2012 you have no choice as far as i know, if the ecu see's more that 1bar it cuts fuel Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted February 7, 2012 Share Posted February 7, 2012 Yes, boost cut means there's no more map left so the FCD is operating in the margin of over fuelling Toyota build into the map. The more boost you run, the closer to lean you run Quote Link to comment Share on other sites More sharing options...
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