Glow plugs are operated for a period of time, based upon EOT; and the duty cycle is based upon battery voltage. I don't see why you couldn't set either the time or duty cycle to zero across the board to disable the glow plugs with tuning. Super Duty rigs would even have the ability to disable the glow plug light in dash, OBS doesn't have that option though.
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Thomas H.
'97 F-250 CCSB 7.3L Auto, Gauges, Modded H2E, 285/200% sticks, 7.3L IC, Stealth Dual HPOP, Pheonix chip
'03 F-250 CCSB 6.0L Auto, Gryphon CTS, FICM tuning by PHP, Powermax
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