JasonS
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I have been operating with the FDC bypassed for a couple of years and decided to turn the fuel down so that I didn't have to keep an eye on the pyro all the time. I turned it down 12 flat as listed here to put the fuel back at a stock setting. Would not start. Turned the fuel up until I the egt wouldn't exceed 1000/ 1100F at full throttle. I could still get 13 psi boost and was happy with the performance. However, it clearly has a harder time starting when cold. Stumbles for a bit at ~50F. Starts fine once warmed up. I backed off the droop screw 90 degrees but it still starts nowhere as good as before. The truck didn't seem to be like this before the FDC was bypassed and the fuel was at a lower setpoint (based on a lower maximum EGT). Does the FDC have any impact on cold start capability (allow a higher full position when initially started)? Do I need to back off the droop screw some more? Suggestions?