We just received our '04 F350 6.0L auto this weekend and it has 200 miles as of now. Ever since we pulled off the lot it stumbles when accelerating from a stop. It feels like a "Dead spot" in the throttle. Once you get moving it doesn't do it again until you stop and take off again. Has anyone else had this problem? The dealer told us it is because it is cold...... I don't think so.

Thanks

 

These things fly by wire...no direct throttle linkage to the intake system. Since it is electronic, it will be several days worth of cold starts before the computer learns the enviroment and how it is to respond to commands. A solid romp on the peddal sometimes helps.

 

I have the same problem on my 04 350, but never asked the dealer why this happens.
My psd is 2 months old with 2500 miles and is running fine except for the hesitation. If you find out why, sure would like to know.

 

Thanks,

other than that i like the truck. Lots of power

 

Thanks

 

was told it was the turbo lag need to get alittle bit of rpm's to get the turbo to kick in and thats the jump you feel and hesitation

dont know for sure tho mine is a month old with 3500 miles going to change the oil in it this week to make sure no fuel in oil cause got 260 miles last tank in 80 degree weather Think it may of been bad gas tho didnt get it from my normal gas station

plus my ac i think has a problem with the ac on a/c i still smell the outside air

build date late nov 03

 

GAS? There's your problem!

 

I had the same problem with mine , the dec. flash solved that problem. now it takes off no hesitation

 

these trucks use a computer to control the fuel and intake system a very short barely noticeable split second delay is normal and unavoidable but it shouldnt be a large delay. go back to the dealer and insist they run a diagainstic you paid a whole load of money for your truck and it should run perfect.

 

Hello... Hello.... Is this thread still on

I just recently bought my 350 SD 6.0 PSD and now that the cold days are starting to arrive, I am noticing these hesitation symptoms as well. I have had the truck for about 2 months and have not had any trouble. But the other day I noticed the hesitation when I was leaving a traffic light from a stop. It seems to do it when I ease on the fuel. It feels like the motor is going to stall, then bam off she goes. I also noticed it in reverse. Ease on the fuel and she almost starts to buck. No good when backing up to my trailer.

Since I am new to the diesel.... should I be doing anything to prevent this or am I just seeing a problem that needs to be addresssed by my dealer?

Thanks for any advice.

 

How cold? Are you running any fuel additive/ anti-gel? Just a few things that can cause a hesitation, but mainly, most people find that there is some small problem that Ford has recognized and has a repair for, usually reflashing your programming. I have had similar problems, just not the bucking. Mine has revved up on its own, sort of like rushing the engine real quick bursts of throttle when I really wasn't touching it. The newest flash is supposed to help this and shifting problems.

 

My guess is that the problem is turbo lag. Lag is inherant of most if not all turbocharged engines, gas or diesel. The lag on the 6.0 is especially noticeable when the engine has yet to reach operating temperature. With any turbochaged engine, it is very important to get it warm before trying to get on the accelerator.

 

Thanks for the input.

Not really that cold upper 30s to low 40s. I usually let the truck warm up before taking it out. 15 to 20 min... As I mentioned, I notice it after stopping for red lights etc... When I go to the office it is about a 20 min ride through town. When I park, I usually back up into the slot. I noticed it this am, and I would believe that the motor and trans are warm by then. Don't get my wrong... the bucking is not dramatic, but it is noticable. I have not used any additives, but not sure if I should for winter.

Mine does the rev on its own thing, too. I have learned to compensate for that one at red lights , lol. Will probably take it into the shop and ask about getting the new flash. Sounds like OE is not a factor. But my thought is that it relates to the weather. If it were a flash issue, would it be doing it on warm days too? The turbo lag is a possibility, I had not thought of that. Will have to watch my temp gages to see if there is a relation.

Being new to the diesel, I just want to make sure I do not break it out of stupidity. I do not remember reading anything in the 6.0 manual about winter prep etc.... Maybe I should revisit that too. When all else fails, read the manual.

 

Never hurts kept me out of some trouble...

 

I know I am responding to some old posts, but I am new to the diesel world and am experiencing what may or may not be normal for a diesel. I am used to large gassers where you can jump on it from a stop and take off quickly. In my '05 PSD, I noticed that my truck is pretty slow off the line until I get some revs going and the turbo kicks in. It doesn't seem to hesitate, it just seems like I am in slow motion for a few long seconds waiting for the power to kick in. I was told by a friend that owns an '02 Duramax that this is normal for diesels (maybe it is for chevys). I took his word until I started reading some of these posts. Is this normal for a diesel or not?

Regardless, I love the power of this engine. I bought it for hauling not for drag racing. I just want to know if I should get this checked out or not. All else is fine. No sputtering. Am getting about 13.5 mpg in the city with about 2000 miles on the engine.

Thanks.