Upgrades and Aftermarket - 99 & up 7.3L EngineUpgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.
why would you disconnect for a zoodad? its not like there is a mass airflow sensor to get confused or anything from the extra air from the hole that you cut in the grill support
I think he was just using it as an example. And really I doubt "Resetting" the PCM would help mileage any either. If your mileage is suffering some now, join the crowd. It will always drop considerably, (10% or so I bet) during the winter. (Winter blend fuel is not as efficent as summer blend I guess)
IIRC our PCM won't clear codes just from removing power. You need a good scanner, or one of the tuners that will read, and clear codes.
__________________
Jim T.*48* SLAPS Co-Founder, 30.8 yrs RETIRED UAW 6/01/06, Now an ART (Specialists Flight Chief) with the USAFR 414th MXS Seymour Johnson AFB. My pics!'03 Dually pics!, New truck, 2011 F-350 SRW LB CC. White Platinum Lariat! 4x4
codes are stored in the KAM i believe, if you remove power from them, you will lose that info, and reset all its parameters and will have to "relearn" those parameters..
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: EMD_16_645_E5</div><div class="ubbcode-body">oh god here goes the "learning" ability debate of the PCM again............</div></div> [img]/forums/images/%%GRAEMLIN_URL%%/laugh.gif[/img]
__________________
2011 f250 XLT 4X4 Crew Cab.
SOLD - 2001 F250 XLT 7.3L SC/SB 4x4 (ESOF) - Tranny Upgrades; SCMT 1705; AIS Intake w/trimmed Snorkel; ZooDad; Turbo back 4" Exhaust; Issopro Pillar Mount Gauges; TC lockup LED; Auto Magic Heater Bypass; 2W Low Switch.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: matthewd11</div><div class="ubbcode-body">wouldnt hurt. Just disc the batteries for a bit. </div></div>
Running two laps around the truck won't hurt it, either. It also will help the truck just as much as "resetting" the computer.
THE COMPUTER IN THE 7.3L DOES NOT LEARN. THE ENGINE PORTION DOES NOT LEARN AND THE TRANS PORTION DOES NOT LEARN.
"Resetting" the computer does give you a good chance to clean the battery cables and posts, so maybe it is a good thing.
__________________ Mark Former Automatic Transmission Engineer 1988-2007
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: JimTJr</div><div class="ubbcode-body">(Winter blend fuel is not as efficent as summer blend I guess)</div></div>
Winter blend fuel does not have as many BTUs per gallon as summer blend, so to get the same amount of energy the engine has to burn more fuel. It's as simple as that.
__________________ Mark Former Automatic Transmission Engineer 1988-2007
I have always figured that the poor milage in the winter months, had more to do with a number of things, extended warm ups(idling) longer time to peak engine efficiency, EBPV ,& EOT ...
Less BTU makes sense due to longer cold EOT ....(shrug)....
__________________
Rick.....
97 F 350 ...Lucky 13 "Most stuff's just stuck & needs hittin with a hammer"....
Quote:
Most people come here for the facts ...not a hug ...
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: action4478</div><div class="ubbcode-body">Less BTU makes sense due to longer cold EOT ....(shrug).... </div></div>
???????????
What's that mean? Lower BTU content means the amount of energy available by burning the fuel is less than summer blend. Since you get less energy per gallon, you must burn more gallons to go the same distance.
How is cold EOT related?
__________________ Mark Former Automatic Transmission Engineer 1988-2007
If you add some cetane booster to the fuel it brings it back to Summer quality.. And you will get better milage cause the air is cooler and more dense in the winter..
__________________
03 F-350 Lariat CC 4x4 LB TN BB Turbo, AFE II w/ Progaurd 7, Quad Pod, Home made CCV.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Oilfield_Digger</div><div class="ubbcode-body">If you add some cetane booster to the fuel it brings it back to Summer quality.. And you will get better milage cause the air is cooler and more dense in the winter.. </div></div>The cetane will accelerate the combustion of the fuel. While this makes it easier to start when cold soaked, it does NOTHING significant to increase the BTUs per gallon of winter blend fuel.
__________________
2002 F350 Lariat CC 4x4 Auto 4.10 DRW, DP-Tuner F5 live tuned stock, quiet, 40dd, 40, 60, 80 tow, 80e and 120r, B&W GN, BrakeSmart, 'pooned tank, tank and pre-pump mods, 2µ Dahl 100 filter, regulated return, BTS dual HPOP, AC singles with EDM 34 lpm nozzles, AIS, H2e, Spearco 6.0 IC, Hypermax 3.5" dp--> MBRP 4" 304SS exhaust, BTS tranny, 203º T-stat, Chevron ELC, coolant filter, Oilguard bypass with Schaeffer 9000, WranglerNW 200 amp alternator & Optima group 31 batteries, Nippon-Denso starter, SPA gauges, SteveRacer mods, Hella 80/100W 9007s, Hella Micro DE foglights, 1000FF driving lights, 220W backup lights, Stancor contactor, Michelin XPS Traction tires, X-Springs, Bilstein shox, custom bumpers but otherwise stock. Nov 30 '99 build engine with 16 K miles, Fluidampr, Comp Cam 910 springs, Melling LPOP and ARP headstuds.
The AutoGuide.com network consists of the largest network of enthusiast-owned enthusiast-operated automotive communities.
AutoGuide.com provides the latest car reviews, auto show coverage, new car prices, and automotive news. The AutoGuide network operates more than 100 automotive forums where our users consult peers for shopping information and advice, and share opinions as a community.
Automatic Transmission Engineer 1988-2007
Linear Mode
