Join Date: Aug 2005
Location: Born in OR. strokin in Texas!
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Ford designed an "engine brake" feature into the 6.0 PSD, I've personally only noticed it in tow/haul mode. the computer basicly kills fuel to the cylinders so that you don't coast so fast.
Also reading into the 6.0 Powerstroke Owners Manual Supplement it mentions somthing about the egine running loud untill it warmed up and the engine noize reduction program starts but that is in the section for adversly cold climates.
'05 PSD, Silver, SCLW, Torqshift, 4x4 -- Mods: Fast Idle switch, Bullet Proof stage 2 Kit, updated STC
'13 C-MAX Energi PHEV, lifetime milage 53mpg
'85 Mustang Coupe, converting to full electric
'65 New Yorker, white, 4dr.ht., 413cid, 727TF, 400,000 original miles