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I used to have a rough idle especially after a hard pull and now it's gone. When my truck was in for headgaskets and studs the dealer replaced the IPR (screen was sucked in he said) and I believe this was the cure for my truck but not sure. Like has been said before do not overfill the oil (1/2 way between hash marks seems best and thats where my oil level was at when I got it back from the dealer). If it was my truck and oil level was at or over full I would change that first and add only 13-13 1/2 quarts and run it. Just over the add mark is fine in these trucks. Hope this helps. My truck just ran out of warantee as well.
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04 F350 LARIAT FX4 CC LB SRW 6.0L AUTO 3.73 LS, MBRP cat back, MSD dashhawk, ride-rite air bags & 05 grill.
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