Stumble/Hesitation/whatever you want to call it!!!

[Runaway]

There seems to be more of these symtoms showing up. I initially reported on this last spring (April) after installing the EZ. I talked with the folks at Edge and they felt the problem may be fuel filter. I changed the fuel filter, yes it was dirty and the problems seemed to go away. But what I didn't realize is the outside air temps where still in the 30's - mid 40's. When I changed out the filter and towed again, outside air temps were in the 50's and above. I went all summer without a hitch. Now that the temps are back cool again, the problem has come back, but now running empty (unless you call an ATV in the bed a load). I'm not running the Edge on the hot side, just middle position. Anyone else with additional information???



What about those of you running the VA-CPC with boost foolers, any of theses hesitation symtoms with your set-ups.



Or the folks with just injectors/boost foolers?



From what I am reading, it appears most of the symtoms are with those of us running Edge products!

 

[Bob Wagner]

Runaway, Sounds like a big problem

https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=29196

 

[Ramafid]

I've never had a stumble until about a month ago. It happens at low rpm (1200-1600) and is quite annoying. It kinda bucks like it doesn't have enough Torque to keep you going which I know isn't the problem. Seems like more and more people are having this problem. Hope the problem is an easy fix once someone figures out what it is.

 

[overfueled]

Runaway, I have done most or all to get rid of the skip or hesitation what ever you want to call it. I have not brought the truck to the dealer.



The truck's engine skips (4 times) at 1800-2200 RPM'S W. O. T. after 2300 the skip goes away and runs fine to 3200. But I have lost a lot of time. I have 12,000 miles on and this has done it from about 3,000. When I put in the upgrades



When I slap the pedal to the floor this thing happens, if I do this slow I do not notice it hardly at all. I put on (3) new Lift Pumps. I change all the lines to 3/8, I went with aeroquip steel braded lines and fittings. It did not change a thing I still had the problem.



So I put on the two fuel pumps 1-15lb 100gph and 1-7lb 100gph pusher, no change the VP-44 will not handle WOT.



The build date is 10-00 I think this is a KEY to what went on. I can also do this with the box off. I put it in drive and power break it will happen.



Got to go work on the new Trans input shaft. Talk to you latter. Steven

 

[LSMITH]

I have had the stumble 5 or 6 times too. It has not happened since last winter either sooo..... ? When it has happened to me it feels like the key was shut off, total power loss, for less than 1 second I would guess. Just long enough to scare the ____ out of me. I hope it does not come back this winter, but it seems to be fairly common and not year specific.

 

[Wiredawg]

Mine Stumbles Too

Guys:



Mine only stumbles when I have the TST turned on. My problem has gotten better... used to happen at least once per tank. Now it seems like maybe every 2000 - 3000 miles. Stumble is ugly when towing. It did it once while towing from TX in Oct.



I bought a Palm Pilot and and Quick Check II but haven't had time to check it out. I think I configured ECM cable wrong. Hope it tells me something.



I'll be watching this and other posts for possible answers.



Wiredawg

 

[rotohead]

I've been struggling with something similar for awhile now. Could it be a AAPS (throttle position sensor)? At the time mine started I had a new TC, VB, brake job and lift pump change done about the same time which I regret doing at the same time now.