Engine/Transmission (1998.5 - 2002) heed help with kind of a sudder

[Blkdawdg]

Me Too!

Mine was doing the same thing..... but it doesn't now because the VP44 went out and now it just blows out white smoke. Oh yeah and I tapped the fuel solenoid wire so I have no warranty. Sounds like fun, huh?

 

[Kent Kuykendall]

Mine is still doing it but not as bad with the replacement ddufm. I'm going to solder my hot wire conection to the box instead of a fuse clip and see of that helps. Mine only seems to do it when at moderate throttle. Back off or push more and it seems to clear up most of the time. Its a pain when towing. Is there a way to test the vp44?



Kent

 

[Diese1nut]

Hesitation

I think we all have the same problem with slightly different symptoms.

I have had this problem for some time and have been following the post that relate.

The bottom line is it's always there.

The problem seems to be at mid range throttle, between 1500 and 2000 RPM. It also is most noticable when towing a load.

Now when we add a fueling box or injectors that just amplifies the problem to where we just can't take it any more and want a souloution.

What realy bothers me is that we aren't getting a lot of feedback from our brother TDR member performance shops.

Even though a lot of us are still under warrantee, if there was a definite repair we could make, we would pay ouy of pocket just to avoid the dreaded usless dealers.

Apparentley No one really knows what the F#$% IS WRONG.

I personally think there is enough of an issue here for a recall or some major repercussion to the DC sphincters.

I thought these truck were made for towing.

We need results.

 

[Boost]

JMarkos



Mine stumbles empty or loaded. When loaded though its much more pronounced, actually throwing me against the seat belt with a trailer. On the lighter side, a friend of mine needed a new pickup a couple weeks ago. He had decided on a new PSD. He needed a ride 30 miles or so to the Ford dealer to pick up his new ride. I gave him a ride and was telling him he should have bought a CTD. Well I needed to pass on a two lane and proceeded to pass a car when about 3/4 throttle my pickup started doing its thing. He gave me the eye and the only thing I could say was "Well at least it doesn't cackle... ..... YET"

 

[rubberneck]

Re: Hesitation

What realy bothers me is that we aren't getting a lot of feedback from our brother TDR member performance shops.



dies1nut, man i agree with you, i have read several posts on this, and i know there is quite a few of us out there. I wish some of the guys "in the know how" would chime in. I know one of them has had to run in to this problem before. it would be nice if someone could say hey we had it happen this is what we had to do. Im with you, i would pay out of pocket if i had to i just want it fixed.

 

[rmknizner]

I am scheduled to be at Cummins Southern Plains in Dallas on Wed to have them put my truck on the Dyno and hopefully diagnose the cause of the problem (the midrange miss/stumble).



Paying out of pocket to find the cause of a problem that should be covered under warrantee is frustrating.....



The next challenge, if the Cummins shop finds the problem, is getting DC to repair it under warrantee (my truck is stock with about 15K miles)...





I will post the results I get back from Cummins.





Bob

 

[Jetpilot]

I have the same problem... . Around 1700 rpm the shudder starts, boy is it really annoying! Anyway DD replaced my UFM and that helped some, but it is still there. If my box is on level 5 it is really bad, level 4 and below is almost never is a problem though.



I hope someone can figure out what the problem is soon.



Doug S.

 

[Kent Kuykendall]

I talked to Allen (not Chip), at Blue Chip about the problem today and he said that they have had a some problem with this kind of thing. He went on to say that it was a flaw in the inj. pump and that there was not anything that could be done for our problem.



Seems to me if there is a flaw in the pump that is at fault, then perhaps someone with expertise in this area will be able to figure out the problem. The problem is it only hapens to my truck when I use more than stock fueling. I think that the problem may be there but is hardly noticible without the box. At least in my case if the fuel goes on aggressivly at the 15-18RPM's then it hapens. But if the aggressiveness is low it does not seem to hapen or it is not noticible enough to feel. But I guess some of you are having the problem at even stock levels.



I wonder if having your inj. pump worked on like what DD does to them if this would fix the problem?



Kent

 

[rubberneck]

kent, did he elaborate at all on the statement that it is a flaw inthe pump. What im trying to say, is it something that is just going to got (. ) (. ) up on us and leave us stranded, or is just an anoying flaw that is otherwise harmless. i dont want to be in the middle of bfe and have this thing go south. i dont know about the others with this problem, but mine was getting much worse, and here the other day, for about 50 miles, i couldn't get it to do it for the life of me. it is definitely becoming eradic. if it is the pump, i kind of just wish it would grenade all together, so at least we would have a definitive answer. oh well

 

[Kent Kuykendall]

rubberneck



He said that it was not something that would leave you stranded, it wouuld just keep right on doing it. I wish the thing would just go bang and then a new one would fix it.



Keith from DD, The thing that you do with the pumps, do you think that geting this done could be the answer to this thing, or is this something that can only benifit the HO's.



Kent

 

[Boost]

Mine did get worse over time. When it first started at 5000 miles it was happening only maybe 5% of the time and not very noticable. Now 13000 miles, it happens every time I hit a certain throttle setting and will shake your teeth loose. New vp44 on order.

 

[rmknizner]

I was at Cummins Southern Plains in Dallas this morning to try to diagnose the midrange miss in my truck. They dyno'ed it and said that there was no problem, and that Hp was good for this engine. I felt like a stoopid whiner for complaining about a non-existant problem.



When I got home, I studied the dyno printout and saw that the lowest rpm tested was 2400!!! This is above the 1800-2100 rpm range where I TOLD them the problem was!



The dyno sheet also stated that the customer concern was LOW POWER. NO NO NO! I told them it ran flat or missed from 1800-2100 rpm. It seems a miscommunication between the service writer and the dyno operator wasted an entire morning of my time.



I will call tommorow and confirm what was done on the dyno. The people at this Cummins shop could not be nicer or more helpful... I just wish I had looked at the dyno sheet before leaving!





Bob

 

[Kent Kuykendall]

fuel tube leak

I found a fuel tube leak and after I replace it I will post my results. I have my fingers crossed but not very optomistic.



Kent

 

[rubberneck]

boost, any news yet.



kent, i had a small tube seepage from #3 tube, snugged it a bit, was not my problem, sorry dude

 

[Boost]

No news yet. The pump is on backorder, still waiting for it to arrive. I will post when it is replaced.

 

[Kent Kuykendall]

I replaced my leaking fuel tube and it did help. When UFM is in 5/5 I can now drive normally where before you had to either be pushing into it or letting off of it. I have not towed yet but I will post my results after I do. I don't think it is totally right but it is a lot more drivable. I am seeing mor booste and more power smoother and quieter. Headed for CT for the hollidays Merry Christmas to all at the TDR.



Kent

 

[Runaway]

Mine started out last April when temps in 30 - 40's while towing. As the weather warmed up I didn't experience over summer months on into fall. When temps went back down, now I have it happen running empty also. Always around 1700 - 1900 rpm. I took my EZ off for 5000 miles and didn't even get as much as a hiccup out of her. I would blame the EZ, but too many other folks are having the same problem with other products.



As a side not, by looking at the signatures, seems these symptoms are coming mostly from the trucks with the 3. 54 gears. Don't recall anybody psoting with the 4. 10's. Comments?

 

[JMarkos]

I have kind of noticed the same thing, I pulled my father-in-laws boat all summer, no problems except for blowing the intercooler hose off, but as soon as it got cold I started to see it, maybe it is just coisidence.

 

[PROSTAR190]

Kent,



When you say fuel tube are you speaking of the tube inside of the head or the tube from the pump to the head?

 

[zman]

I just posted this in one of the other "shudder" threads...



I experienced the exact same shudder that you guys are talking for the first time about 2 weeks ago when towing about 9k. Since it hasn't happened again, I didn't think anything about it until I saw this thread.



The truck sat outside the night before (usually parked in heated garage) and the morning temp was around 20*F. The shudder occurred around 1800-1900 RPM. Backing off the throttle made it go away, but more throttle made it worse (too chicken to accelerate through it).



At first, I thought it was the trailer bucking, but I could make it stop by decelerating slightly. My next thought was that it was axle wrap of some sort, since I could make it go away by decelerating and it got worse by accelerating.



After the transmission and engine warmed up, I didn't notice the shudder again on that trip. To this date, I haven't been able to figure out what caused it, but as stated above, it felt like riding on oval tires.



Steve