6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
So I now have 350 miles on my 08..so I started to push it a little. First time I have floored it from a dead stop....almost nothing for a second or two..just very sedate aceleration...then bam...takes right off. I hesitate to call this turbo lag..feels more like the " fly by wire " go pedal is just programmed to take off easy? Getting into it once moving..seems very normal. This isn't a problem to me..am not drag racing..just curious if this is normal?
Also,,,hope fuel mileage improves..1st tank or so is 11.5 in stop and go city traffic. I have only percieved 1 regen so far..in my drive way...if it has regen'd while driving,,I didn't notice it. Very quiet...hard to tell it's not a gasser!
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2008 F350 Crew Cab 6.4 PSD 4X4
Excel 33RSO 5th Wheel M/C Lift on the back
All the drive-by-wire Powerstrokes have this thing where they hate to be suddenly floored; you'll get far faster takeoff if you ease into it just a tiny bit. I don't know if it's the engine, or the software. I could see the software designer thinking that a sudden swing from one extreme to the other on a pedal reading could be an error condition, so they'd want to debounce it a little longer to be sure it's real.
Or maybe they're just trying to simulate on old carb with a bad accelerator pump valve...
Duncan
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The 1997 F250HD Crewcab: Picture
The 2000 XLT Excursion <font color="red">(SOLD)</font>: Picture
The 2003 F250 Crewcab 6.0L: Web page
The 6.0L Bible: Web page
The 6.4L Bible: Web page
I think what they are doing with the programming is to keep morons from slinging a drive shaft through the floor by repeatedly adding all the available power at once.
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2006 Dodge CTD 2500 SLT 4X4 Quad Cab Long Bed 6 Speed.
Traded:2004 F250CC FX4 XLT Long Bed Torque Shift, $5.00 AIC.
Its to keep it from smoking during an over-fueling condition. By not allowing it to dump more fuel in than there is air to help combust it, the program keeps the truck from throwing clouds of black smoke.
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Feb 03 6.0 Silver F-250 SD SC XLT long box, 6-spd 3.73ls, Fx4, Stock, Spray-in liner, Contico box.HARPOONED.
My 05 6.0L does the same thing,I floor it & the truck just sits there for about 2-3 secs before it feels like moving! [img]/ubbthreads/images/graemlins/eek.gif[/img]
__________________ 2005 F250 XLT wedgewood blue 4x4 C/C SWB,6.0L PSD, Auto.(Member of 05 STC Failure Club ) 2006 Expedition Eddie Bauer,5.4L (Wife's) NRA Life Member. TSRA Life member.
My '04 PSD doesn't respond if the go pedal is suddenly slammed all the way to the floor for a second or two. However, if I (flutter) the pedal just one or two times real gentle like and then give it the juice, the truck launches like a scalded cat. Just takes a split second to tap the throttle, seems to get the go factor going, and then she spools right up. I don't know why and I don't think it is turbo lag, because it only takes a split second, and she is off and running.
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2008 F-450 Lariat Dark Stone Metallic over Pueblo Gold 4x4(manual shift transfer case, manual hubs), High capacity tow 4:88s, Off Road, Camper packages, Sirius Sat, Upfitter switches, DVD entertainment, tailgate step, traction control, Audiophile 6-disc, PTC Supplemental heat and heated seats(warm buns), rear sensors, traction control, tailgate step. Built May 8, delivered May 24
Reese Signature Series 24k fiver hitch, I installed it myself, best hitch I have found yet
Line-X bedliner, heavy duty floor mats
2003 Sunline F281SR(weekend getaways)
SeaRay 215EC http://community.webshots.com/user/C...host=community
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So I now have 350 miles on my 08..so I started to push it a little. First time I have floored it from a dead stop....almost nothing for a second or two..just very sedate aceleration...then bam...takes right off. I hesitate to call this turbo lag..feels more like the " fly by wire " go pedal is just programmed to take off easy? Getting into it once moving..seems very normal. This isn't a problem to me..am not drag racing..just curious if this is normal?
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Dang, I thought Turbo Jr. was intended to eliminate that. My 04 does the same thing, yielding a scary moment or two crossing busy highways.
Just after tuneup, there seems to be no turbo lag - it deveops with milage.
Maybe you can do what I do - step on it then immediatley back off a time or two - turbo spins up and off she goes. Does that work on the 6.4?
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Don't tell my cattle I got leather seats!
2006 F450 CC Hauler bed 4x2 6.0 L Pstroke/Torqshift, Lariat, 4.88 r/a.
2006 F350 Lariat CC Dually 4X2, 6.0 TQShift 4.10 LS, STOCK.
36 feet on the floor Elite/Outlaw LQ horse trailer. Sooner 6 horse large dressing/ mid tack.
15 horses with good balance from being hauled behind a P'stroke.
I can hammer the accelerator, and.. when the engine rolls on the coal, the rear tires will break loose and the truck launches, setting me back in the seat but... no black smoke, not a poof. You saying yours pours out the cloud?? Mine doesn't and acceleration is strong as hell. Could it be the Power Service I use?
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2008 F-450 Lariat Dark Stone Metallic over Pueblo Gold 4x4(manual shift transfer case, manual hubs), High capacity tow 4:88s, Off Road, Camper packages, Sirius Sat, Upfitter switches, DVD entertainment, tailgate step, traction control, Audiophile 6-disc, PTC Supplemental heat and heated seats(warm buns), rear sensors, traction control, tailgate step. Built May 8, delivered May 24
Reese Signature Series 24k fiver hitch, I installed it myself, best hitch I have found yet
Line-X bedliner, heavy duty floor mats
2003 Sunline F281SR(weekend getaways)
SeaRay 215EC http://community.webshots.com/user/C...host=community
I use diesel kleen, maybe roll out is not a good term, i can get smoke though if i lay into it without any problem. It gets up and goes great too. I have never had it flashed for anything.
Speaking of acceleration, any of you guys noticing any difference in the top speed of your truck prior to the reflash and after the reflash? I know bunch of you guys bump the limiter, so I figured someone might know. Anybody been able to get one over 85mph after the reflash?
85 mph max? that's a dog. I think the old 03 6.0's could do about 98 with no chip in them and as fast as 140 with a chip.
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Too much junk/toys to mention, ever changing due to too getting bored too quickly. I need a 10 step program!
Want to call? I'm in the book. Want to argue....First explain the square root of negative one....lol
2005 F250 XLT wedgewood blue 4x4 C/C SWB,6.0L PSD, Auto.(Member of 05 STC Failure Club 
) 2006 Expedition Eddie Bauer,5.4L (Wife's) NRA Life Member. TSRA Life member.
Linear Mode
