Compression Ignition Addict
Join Date: Jul 2006
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06 6.0L issue before warmed up? no power
ok so i assumed when it was colder mornings, 40deg F, that the truck made no power because fuel/engine was cold.. but yesterday it was 60 all day almost, started it up cold at 4pm and it barely moved pulling the trailer 200 ft.
It runs worse at 60deg F making any power 30 seconds after you start it than our other 6.0Ls do when its 10deg F outside.
Its so bad that unless you let it warm up idling for about 5minutes prior, it barely will hit 2000rpms and shift out of 1st gear... same thing in any gear if you can get it into high enough rpms to upshift.
the dummy plugs and high pressure rail o rings or something were changed back in august and i had'nt driven it myself then so i dont know if it was related or not. What could cause this? You feel a misfire/hesitation bad just rolling down the road, it does it at idle too.
Say you start it at 40deg F, in neutral or park you rev it up to 2000rpms, it shakes and sputters like it cant spin any faster.
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