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Old 01-25-2006, 12:27 PM   #29
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hi m' mate and others

yes it has 6 gears and there are at least 2 mapping sequences used from the factory. one for normal temps and one for cold.....something like 1,3,4,5,6 and 1,2,3,5,6.....but don't quote me....the info is on the diesel techs web site i already listed above. the tow command raises the shift points and may also use another mapping sequence.....i've forgotten.

as for the idleing issue his advice was idle only long enough to warm the defrost....and only cool down 2-3 minutes.

prolonged idle with this drivetrain (and other diesels really) results in incomplete fuel combustion, build up of deposits on the exhauset valves, recirculation valve (egr) issues, AND fuel gets into the oil.....which isn't a good thing..

we discussed this in another thread recently......

http://www.airforums.com/forum...ing-19960.html

cheers
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Old 01-25-2006, 01:01 PM   #30
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Silvertwinkie, you are right about the LP. I am running a fumigation type system, that sucks LP into the turbo. So far it is working rather nicely. Of course "you can't get something for nothing", the diesel not used is simply replaced with propane. But, as a bonus, you get about 85 more HP and an overall boost of 2-3 mpg. Does it save money? Depends on how much you are paying for diesel and propane. My last tank was $1.88 a gallon for LP.

I did this mainly to increase the cruising range of my truck. A decent in bed aux *DOT legal* diesel tank system is around $1000. I have about $500 in my entire LP system. I now have a comfortable 700 mile cruising range, plus 35 gallons of LP that can used for other things, like running my EU2000i.

As far as idling goes, I think the practice oringined from railroads. The first diesel locomotives had piston rings that would come unseated if the engines were stopped. It was about a 2 hour process to crank the engine over by hand to reseat the rings before it could be started, hence it was easier to let them idle for days on end. In this day and age you really don't want or need to idle any kind of diesel, be it in a tractor, truck or construction equipment. Some folks think it is "cool" to have a diesel sit there and idle. Must be a redneck thing.
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Old 01-25-2006, 02:36 PM   #31
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Originally Posted by Pick
Silvertwinkie, you are right about the LP. I am running a fumigation type system, that sucks LP into the turbo. So far it is working rather nicely. Of course "you can't get something for nothing", the diesel not used is simply replaced with propane. But, as a bonus, you get about 85 more HP and an overall boost of 2-3 mpg. Does it save money? Depends on how much you are paying for diesel and propane. My last tank was $1.88 a gallon for LP.
Pick, all I can say is that you are the man....being a Tim Allen type myself, it's just great reading your posts!
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Old 01-25-2006, 02:51 PM   #32
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My understanding on the idle situation...The reason you see alot of big rigs doing it, is they have cab heaters or airconditioning on, you will be seeing less of this as time goes on. Many truck stops have started installing RV style power posts for the big guys to plug into, how they keep from running over them has got to be another story As far as the power strokes are concerned, the early 7.3l can be idled for quite a bit with little or no problems, if you are planning on using it a standby mode you really should install a hand throttle or some type of electronic idle boost mode. The late generation 7.3 psd and the 6.0 psd, do not need excessive idling it will plug up the various breather/pollution control systems, as well as cause issues with the turbo getting gummed up. They actually make an automatic cool down/shut down system that runs of the EGT sensor to turn the engine off when the temps are low enough. The rest of the clowns idleing are just living out their fantasies or still believe the old wives tale about excessive wear and tear when you start. FWIW my max idle time unless there is a compelling reason otherwise is 5 minutes tops. In cold weather(30 degrees and below) I plug the engine heater in to a timer that turns it on 3 hours prior to my planned start time, in really cold weather it stays plugged in period. Makes for nice easy starts and quicker warm ups...

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Old 01-25-2006, 03:05 PM   #33
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Steve, I have a 2005 F-250 Super Crew with the 5-speed automatic 6.0 L with 3.73 rear end similar to yours. I get 16 MPG's if I don't leave the county and all driving is in town. When I commute 8 miles to interstate and 17 miles interstate on to work I average a tad better than 20 MPG's. I just got a recall saying that the computer was incorrectly set at the factory and I need to take it to a dealer and have it properly programmed and that I will experience slightly less acceleration during the first few minutes during cold weather until the engine warms up.

I am concerned that changing the programing might alter my mileage in a negative way. A buddy of mine with an '03 F-250 has recommended that I get a programmer and change the programming anyway so it might be accedemic re: Ford's re-programming but that is a ways off before I get one. This is my first diesel and I don't know what to expect but the mileage is about 2-3 MPG's better than my F-150 extended cab gets. I haven't towed with it so I don't have any figures there but I would guess it will get about 12-14. Any suggestions or further explanations re: the recall to have it re-programmed would be welcomed.
My 05 F250 is absolutely bone stock, has nearly 18,000 miles on it and still has the original air cleaner element. It has much more power than either of my 7.3s, is easier to drive, AND gets better mileage. I have had absolutely no issues with this truck. 18.5 MPG @ 72-75 MPH in a 7,000 lb truck is pretty good to me. My worse towing mileage was 10.0 while fighting a 40-50 MPH headwind @ 65 MPH, had power to spare in that situation.

That said I'm extremely reluctant to use a programmer. I'm not crazy about the fact that I cannot manually select 4th gear or that the torque convertor unlocks EVERY TIME you take your foot off the throttle. I may consider a replacement convertor after the warranty expires in order to use a programmer that lets me chose when the convertor is locked or not. While the tow-haul mode does a good job of holding my rig's speed back on downgrades I'd love to have an exhaust brake.
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Old 01-25-2006, 03:38 PM   #34
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So, newbie question #3: I park my truck in my garage...tight fit but there is room with the garage door closed and still room for my wife's Expedition...anyway, should I be letting it idle for 2-3 minutes when I get home or is it ok to pull into the garage and turn the engine off? Should I let it idle after the 30 minute drive from work and then pull into the garage?
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Old 01-25-2006, 04:17 PM   #35
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Wow! Active thread. 2002 F250 7.3L PSD w/4R100 automatic, 4WD. We get 14 mpg commuting on all city streets and 20 mpg all highway not towing, not exceeding 65 mph. Never towed the 34 far enough to get an accurate read on the towing mileage. The bone-stock 7.3L has plenty of power with the 34 loaded up a bit over 9,000 pounds, and the 6.0L has even more, plus the 5R110 automatic's first gear is lower for more torque to the ground starting out on a hill. You don't NEED more power than the 7.3L, if you drive reasonably.

My advice is to stay away from TheDieselStop. (yes, this is "do as I recommend, not as I did"). They will have you convinced you NEED to do all these mods to your truck, and that it will fail if you don't do some of them. Reality check is that plenty of folks drive them hundreds of thousands of miles stock. OTOH, if you go there, you'll get to hear from those who've trashed the engine hot-rodding it and whining that Ford voided their warranty.

As far as idling, some who do it use a box designed for ambulances and other vehicles that need to keep the alternator(s) spinning faster, to prevent wet-sumping. Our stock Ford computer has a feature that will bump the rpm up to a bit over 1,000 rpm, if you let it idle very long.
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Old 01-25-2006, 04:55 PM   #36
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Quote:
Originally Posted by Minnie's Mate
So, newbie question #3: I park my truck in my garage...tight fit but there is room with the garage door closed and still room for my wife's Expedition...anyway, should I be letting it idle for 2-3 minutes when I get home or is it ok to pull into the garage and turn the engine off? Should I let it idle after the 30 minute drive from work and then pull into the garage?
Depends on how hard you are driving it just prior to coming in the drive I usually let mine idle for just a couple of minutes when I hit the yard, while I am recording the odometer reading for business reasons, but that is after a 1/2 mile idle along what passes for a driveway around here. If you aren't driving it hard (like just coming off an interstate) or towing a maxium load, I wouldn't worry too much about cool down.

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Old 01-25-2006, 05:17 PM   #37
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hey psd lovin folks......

we are having quite the super duty hug session.


m' mate......
i agree with wahoonc and woodie.....and moe of course.
since my neighborhood is 25mph, i'm already cooling down for the last couple of miles anyway. the stock temp gauge is essentially useless except for "it's too late" over heatin'.....so if you really want to know get a better temp gauge.....like rpms i watch the turbo boost qauge and if i'm not using any, or less than 10 psi, i don't worry about shut down. IF TOWING or pulling off the interstate for fuel after hard driving.....the i do give it 3 minutes to cool some.

for you 05 folks i've had zero issues also and love the beast.....BUT i took it in for the reprograming and relabeling recall (csb) today and mentioned a little diesel smell inside this winter while sitting in traffic, and a little shudder during shifts from in the middle gears..........well turns out i did have a leak at the manifold and a tranny glitch. so they are keeping it over night to finish these 4 items.......a rental came with the recall so i'm fine. will up date when work is done.

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Old 01-25-2006, 05:45 PM   #38
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IIRC the orginal question was mileage....my 96 PSD dually(yes that affects it) 4x2 4.10 gets 15 mpg tank average in mixed driving 13.5mpg around town. I will check back in Saturday with a dedicated semi unloaded highway run. I haven't pulled the AS with it yet, but pulling a 12k# gooseneck equipment trailer I was getting close to 14mpg at 65 mph.

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Old 01-25-2006, 07:39 PM   #39
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Maurice -- Good to hear your input. It does take some sharp reading between the lines at DieselStop to recognize the folks that regret goosing their PowerStrokes. ... distinct from the young foo' types who still want to do it. Your post alone should be required reading! Thanks
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Old 01-26-2006, 10:05 PM   #40
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Here is a photo of the concept for the F-250 as shown at the Detroit Autoshow. It should get pretty good mileage with those aerodynamics! And the color would go well with an Airstream, too. I might just be willing to trade before mine is 10 years old if they actually take this concept to market.

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Old 01-26-2006, 10:16 PM   #41
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here is a link to the complete story on the super chief concept......which really is just a concept. gm showed something like this last year with side doors for the truck bed and 'never to be seen in real life' interiors.....

as for the super chief....i'm not sure if the tri fuel design would be strong enough to pull big trailers.

but really in a diesel/hybird concept....i'm on the waiting list now!!

lots of pictures in the linky.......and check out that avant/bauhaus interior.......

http://media.ford.com/newsroom/relea...?release=22295

cheers
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Old 01-27-2006, 10:37 AM   #42
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Thanks for the link to the press release. I still would love to have the opportunity to put one in my driveway.
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