Did you ever get this problem solved on the 2001 7.3 diesel? 12000 miles on engine only! I am having the same problem and can't find a dealer that knows how to fix it!
I am afraid that not knowing how to fix the problem with loaping and rough idel on start up,the mechanic will screw it up worse and keep telling me there's nothing wrong! I wish there was some way to get the Ford company to help.
You pay $40,000 for a f-350 heavy duty diesel and can't even get it repaired. I was so HAPPY to see other people with the same problem,not that I want you to have problems with your ford truck but the dealership keeps telling me there is nothing wrong with the vehicle and no one else has that problem!!
IF ANYONE HAS GOT THIS PROBLEM SOLVED. PLEASE TELL ME HOW TO GET THIS FIXED!! APPREICATE IT SO MUCH!!! If Ford keeps this up it's not going to be #1 much longer!!

 

well I went up and got a new fuel filter and stuck it in.man theold one was black as night put the new filter in runs like a new truck.guess Ill replace the filter a little more frequently doh.







Way Cool JR


thanx for the help guys this place is great

 

Our quality guru at the plant bought a 2000 which had an oil consumption problem. They replaced his engine under warranty and for reasons unknown to me the new engine came with the wrong wiring harness so they used the wiring harness from the old engine (the point being that the only change was the engine). The high oil consumption engine never did this but the new engine does (oscillates between 800 and 1300 RPM until it gets warm). We have not attempted to prove this out but the consensus is that it is a lazy IPR valve that is allowing the injection pressure to vary with thicker oil (but not allowing it to vary enough to throw a check engine light). That would account for why some people got some relief from this problem by changing to 10W30 oil.
Ford is supposedly working on this problem but I doubt if they're taking it very seriously or they'd have dumped it in our laps, and as far as I know, that hasn't happened.

 

I want to thank you all for your feedback ! Gives me something to try. I get disgusted with Ford at times but I have always bought Ford,my father was a Ford man and Grandfather. I do hope Ford has a recall on this rough idel problem(loaping) soon! I noticed I am using more fuel also!
Thanks again for the feed back.I'll buy the beer someday maybe!

 

I finally regisered so I can hopefully clear things up for you on the cold start /lope issue. On 2001 model psd they are recomending to use Ford 10w30qsd or any other good DIESEL motor oil. I have changed to 10w30 in quite a few and that has taken care of the lope/stall issue. Ford I hear is working out a fix for those that can't be corrected by using 10w30. Look in the diesel supplement in the oil section, it reccemends 10w30 for temps lower than 30 farenhieght. Unless your using the truck for severe duty. I hope that helps. Have a great day.

 

so far to date we have had about 6 truck we fixed the problem with the 10w30. still wierd it is only 2001s though. guess the biggest complaint is the price of 10w30 diesel oil is more than the 15w40.

 

I have found the problem only on the 01's as well. It is probabley in the PCM programing. When my truck would lope I would push down the Accelerator pedal slightly(not enough to raise the idle) and it would clear up. I think by doing that it had taken the PCM out of it's idle strategy.

 

sounds like you have it exactely. i was thinking the pcm also.

 

the problem is not only on 2001 I just changed a 99 over to 10w-30 because of loaping and it fixed it. It completley changed the way it ran cold. before it would not rev up until it ran for a about 2-3 min. put 10w-30 in it fired up without loaping and would rev up. I have also seen 2000 do the same thing.

 

deisels depend on heat to operate. There are no sparks only extreme compression to ignite the fuel. When there is no heat in the plan (cold start) the system can't operate at full capacity and therefore it loaps, coughs, spews unburned fuel (smoke), and idles as though a few cylinders are not up to par (which they aren't). Once the heat is added into the picture (warmed up) they run fine. This loaping etc. is normal and happens to all deisels although some more than others. It also is dependant on where you live and how you maintain it. Alaska would be differant the Florida. Don't worry about the loaping or smoke or rough idle when starting cold only if iy continues after warmup.:o

 

Actually, the owners manual calls for 10w30 at temperatures at or below 30 degree's Far. I have driven many with a "dead pedal" when it is first started on a cold day.

 

my 01 does exactly what ya'll are talking about, thing is I dont believe it did it last winter.

 

The "dead pedal?" (I assume you mean slow to respond or slow to accelerate) is most likely the limiter that keeps full power from being applied prior to warm up. These things don't require a rocket scientist. The oil is important, BUT the owners manual has been wrong many many times. Oils that are synthetic have far better cold start abilities and prevent wear far better than petrolium based ( that's why jet engines ALWAYS use synthetic.) Oil in its thickest state won't stop the energy in a PSD, it will start and will run. THE ONLY reason they state you need a lighter weight oil in cold weather is to insure it get to the little parts away from the pan. It won't make a deisel run slow! One of my psd's pulls 10,000 lbs 50,000 miles a year and has 397,000 miles on it and all I have ever used is synthetic. I also live in Idaho and the winters get cold. The loaping and rough running engine is NOT caused by a higher viscosity oil, its pure physics.

 

The HEUI (hydrualic electronic unit injector) injectors in the powerstroke operate off of the high pressure oil system. It is important to use oils that have anti-foaming agents or you will develope air bubbles in the oil. If you get air bubbles in the oil the HP oiling system the injectors will not work properly (just like a brake system w/ air in the system will give you a spongy pedal because air can be compressed and fluids cannot). While I do not have an engineering or a physics degree I assume that improper viscosity has a negative effect on the HP oiling system as well, and is more evident at colder ambient temperatures. I have resolved many cold start issues by changing to 10w30 diesel grade oil, when all other diagnostic avenues have not identified any glow plug concerns, or other things that can contribute to a hard start/stall when cold. The Powertrain Controll Module(PCM) and Injector Driver Module(IDM) controll the amount and timing of fuel delivered to the engine. They use many inputs, Accel pedal Position sensor, Baro pressure, Map pressure, Vehicle speed ,Engine oil temp, Injection controll pressure, just to name a few. The outputs are Injection controll pressure regulator(which controlls oil pressure in the cylinder head, to the injectors) and by varying the pulse width (on time) of the injector) and the timing of the injector. The injector uses the oil pressure to increase the pressure of the fuel leaving the nozzle tip.

 

It is not worth the effort to go down this road anymore! Some people get the drawers in a knot so keep on trucking. Oh by the way the little Certification you added to your name to try to make me think you know what you are doing DOSEN'T. I have yet to met a Cert Tech that is worth a good fart. For some reason you have totally missed the point I was making and are hell bent stick to OIL viscosity, who knows maybe there is another avenue to explore. Have a great day, and don't forget to change your oil! I'll make a bet you are not over 25,,,????