Join Date: Jan 2010
Location: Denver, CO area
Thanked 75 Times in 61 Posts
When you say your cold start issues went away with the latest flash; what was the flash you had prior?
I had my 06 re-flashed about 2 years ago. It fixed quite a few issues. It seemed to improve the cold start issue, but, didn't eliminate it.
I also still have issues running in extreme cold. When I say extreme cold, I mean less than zero degrees F. The following symptom shows up after it's completely warmed up: It idles fine, and has good power when it starts out from a light, but if I continue to accelerate, after about 5 seconds it starts choking out and missing. I don't think I'm going to fix this problem easily because I think the problem is the extreme cold air cools everything down so much it's like the engine is starting up first time in the morning. I think a cold cover is the only way I'm going to fix this one. A cold cover is a cover that goes over the front grill. It works by forcing most of the intake air through the engine compartment. Normally, this is not necessary, however, when you have zero degree air coming in from the outside, this tends to be too cold to allow combustion to occur. Cold air is good, ice cold air is too good. This is just what I think is happening....
06' F250 Mods:
-K&N E-0780 Air Box, ZooDad Mod
-Garrett Powermax Turbo, CFM+ Smallmouth Intake Manifold
-Blue Fuel Pressure Spring, Large fuel lines from pressure regulator to heads
-MBRP 4" Turbo back exhaust; cat installed
-SCT SF3 Tuner w/SRL custom tunes from Matt at GearheadAutomotivePerformance.com
-Refurbished 50 volt FICM, Eliminated STC fitting, upgraded stand pipes and dummy plugs, Bulletproof Diesel EGR cooler, upgraded turbo oil supply and drain
-Oil change rotation; 5k-5W40/5k-15W40/5k-15W40
--Rotella T5 or Valvoline Blue Extreme 5W40, Rotella or NAPA 15W40, Archoil 9100 friction modifier (16 ounces to crank case; 10 ounces to each differential)
--2/3 Qt. tcw3 2 cycle oil per tank Power Service (5 oz. Stanadyne every tank)
-Cooling system flush with Restore and VC-9 @ 73,000 miles w/new thermostat
-Eliminated clunk while sitting at a light (75,000 miles); Lubed rear drive-shaft spline with Ford lubricant; Symptom returned at 100,000 miles...re-lubed at 112,000 miles....wow!! it's so smooth again.
-1/2" shim on carrier bearing mount
--Original Motorcraft lasted 4 1/2 years
--AutoZone Duralast Gold lasted less than 3 years
---(with 2/0 cables between + terminals)
--Still on 2nd set of Autozone Gold (replaced free)
--DC Power 185 amp
-Teflon sway bar bushings
-Moog Ball Joints (originals seem to be holding tight at 108,000 miles; it's just a daily driver, so this seems to make sense)
-Cooling system filter
-OEM HG/ARP studs