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Your not the first to experience poor speed and black smoke.....altitude does that. If your truck was a sea level set IP vehicle then a change to high altitude settings/IP may be required. The BARO sensor also changes shift schedule to compensate, maybe it is not working correctly. Were you shifting it down on hills or letting the trans do it.
As stated our guys over on the IDI forum would be glad to help you.
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93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93
Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.
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Last edited by cdnsarguy; 10-30-2009 at 08:17 PM.
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