F350 problems. Im very new, have mercy. - Ford Powerstroke Diesel Forum
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Old 12-08-2010, 01:59 PM
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F350 problems. Im very new, have mercy.

Bought my first Diesel a couple months ago, a 2000 F350 CC LB DRW 4X4 with 250,000 on it. It seemed to be in descent sape when i bought it but as i dont know a lot a bout the powerstrokes i didnt really know what to look for. My dad owns his own repair shop but doesnt get a lot of powerstroke work so hes not an expert. for mods i've replaced the factory air box with a cone style filter element, put on a 4" turbo-back straight pipe and added a superchips programmer. im only getting 12MPG empty which seems kind of low to me. It pours white smoke on a cold start for 1-2 minutes. it seems to have descent power but the fuel milage is a killer. i expected 14-16 at least. i put our scan tool on it to read ebp and manifold pressure. key on engine off MAP reads 12.9 EBP reads 15, and baro reads 14.5. same after new MAP sensor and cleaned EBP tube. looking for some ideas as to what, f anything, is wrong with my truck.

Sorry about the novel, any help is appreciated.
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Old 12-08-2010, 09:31 PM
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DRW's are not exactly high mileage. are you talking any highway driving or alot of roads n city? yeah the ebp sensor can screw things up but seems like you fixed that. what tune are you running with the superchip? bumping up for ya to see if anyone else can help.
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Old 12-08-2010, 09:37 PM
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What gears does the truck have , also any lift or bigger tires . My 99 got around 18 mpg when I got it . I have lifted it and put 315 75 16 s on it and now am only seeing 13.5 . This is a mix of in tow and buzzway , with winter blend fuel . I am hoping it will be a little better after just having the tranny rebuilt . Like said befor DRW trucks aren't know for there mileage . That being said is you can get it better . Get rid of the superchips and get some custom tunes .
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Old 12-09-2010, 06:32 AM
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Im running the performance towing tune, the superchips is a temporary thing that I picked up cheap till I get a DP Tuner chip.
Driving is about half highway half back roads. not much city and very few really short trips. It has 4.10 gears (according to the Axle tag).
Any advice on all the white smoke? Or is that somewhat normal for cold weather?
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Old 12-09-2010, 06:56 AM
dmd dmd is offline
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Dont know where you live, so dont know how to define "cold".. Florida cold is
different from North Dakota cold. With it starting we know the glow plugs are
working.

Also, most of the cone filters are not designed for diesels. Turbo diesels need
very good filtering to avoid turbo and ring damage. You might be better served
with a Donaldson or 6637 type filter.
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Old 12-09-2010, 08:55 AM
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Sorry. I live in Michigan, cold this time of year means below freezing at the warmest part of the day. the truck gets plugged in at night and doesnt start too bad in the morning. i was working 10's up untill yesterday and it really didnt like to start when i went to leave work, rough run and tons of smoke.
thanks for the info on the cone filter, ill look in to a couple of those other ones
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Old 12-09-2010, 01:15 PM
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in the cold cold and the winter blend fuel i wouldnt expect alot right now.
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Old 12-09-2010, 04:23 PM
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make sure you wait another 30 sec after the wait to start light goes off, the glow plugs stay on 90-120 sec, give them time to work. Also you could have a couple weak glow plugs. but after sitting all day at work you will always have some smoke.
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Old 12-09-2010, 05:05 PM
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How fast are you doing on these back roads and highway?
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Old 12-09-2010, 07:17 PM
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i also have a dually 4.10s and im running an edge attitude im in northern pa temps are staying below freezing as well im only getting 12-13 around town but during the summer was getting 16-17 and i run the truck hard and take off quick but in the summer on the highway i get 20, the trick with 4.10s is to keep the truck under 2000rpm and youll get better mileage, on the highway for every 300 rpms over 2000 i loose 3 mpg
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