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Message: [QUOTE="golfer, post: 595868, member: 266"] (embarrassingly)...we just recently found this issue in the DAC base file...from which all 'custom' tunes are derived...it's possible that other tuners have made this same oversight. ie...the Ford factory EOT vs RPM timing table has an obvious flaw in it. at cold oil temp, and low rpm, this factory timing table has 12deg of injection delay (retardation)...most notable at cranking rpm. just a few hundred rpm higher, and there is a TWENTY FIVE degree swing in this timing table (from -12deg to +13deg timing advance)... this isn't at all 'dangerous' to the engine, but it does dramatically affect the amount of smoke on a cold start...since the injectors are literally firing very very veryyyyyy late into the cylinder...giving it that nice muffled (choking on soot) exhaust sound... since the fuel is simply not being combusted/burned anywhere near completion. again, this is only going to apply to the L99-2001 6speed trucks with a DPC-421 processor. (QEK, VRP, ZHL, BAW, DAC, VXY, XPC) [/QUOTE]

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