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Old 07-17-2011, 12:53 AM
atvfamly atvfamly is offline
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Join Date: Oct 2010
Location: southeast MI
Age: 41
Posts: 15
Gender: Male
Vehicle: 1999 Dodge Ram Sport
Color: Banana
Engine: 1998-2001 360ci (5.9L) Magnum V8 245hp(standard), 250hp(Sport package)
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I had a problem with my 99 ( 5.9 4wd ) that was driving me nuts. When I would first start it, it would run great. But then as it warmed up, I would have to throttle it up to about 2k on the tach. Once the temp guage got up to normal operating temp, I could let off the throttle and it would run fine. If I tried to run the truck before that, forget it. I replaced everything coolant related, it was due, and the O2 sensor before the cat (upstream). Pretty sure it was the O2 sensor that fixed the problem. Maybe try that.
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