MISS
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Freshman User
Joined: May 2004
Posts: 30
Likes: 0
From: grant al
MISS
Have 03 6.0 stock other than head studs, with 105000 miles. Runs perfect except 1 little problem. I live on a small curvey mountain in north Alabama, so you know it is not a big mountain. I normaly hit the foot doing around 50 to 55 mph, but slowing for the curves and the pull before you get to the top the speed has droped to a point that it is about to downshift, but before it does the truck starts missing and making a popping sound, sorta like backfireing but it sounds asif it is coming from under the hood. A final note, this September 30th. the day I had my trans. flushed, also does not do it every time.
Thanks for any help
Thanks for any help
Lead Driver
Joined: Jun 2007
Posts: 6,757
Likes: 5
From: Corvallis, OR
Sounds like your turbo is sticking causing turbo farts (the noise you hear) if the turbo isn't sticking, could also be EGR related. I would pull and clean the turbo and EGR valve, per instructions in the tech folder, and see if that helps. Also, try using tow/haul mode on that hill to get the RPMs up and keep it from building too much boost and back pressure at low RPM.
