Hesitation and high KR Cold weather issues?
- Thread starter ShoBoat
- Start date
It's time for a tune revision friend...I'd ask for V9 tune...something has changed from last year....or like I said before...let the sensors make the changes..that's partly what they are there for...
Think of it this way...u are on the cusp of knock and running the max amount of timing and riding the edge and making max power and the ecu is keeping it in check....revise the tune and pull a few degrees in certain places and u will not have the knock retard but still end up at the same timing because it won't be pulling any ....maybe the ecu is not pulling timing because u have a problem but because u are slightly over advanced to begin with
Think of it this way...u are on the cusp of knock and running the max amount of timing and riding the edge and making max power and the ecu is keeping it in check....revise the tune and pull a few degrees in certain places and u will not have the knock retard but still end up at the same timing because it won't be pulling any ....maybe the ecu is not pulling timing because u have a problem but because u are slightly over advanced to begin with
SHOuUp, doubtful. As I have 0 issues with the stock tune.
ajpturbo. Unfortunately LMS won't even acknowledge an issue. Their take is that monitoring through the OBD2 port is not supported, and very unreliable on the Ecoboost. They will not issue a tune revision, only if I drive down there and put it on their dyno. I understand that the car will adjust and make corrections on the fly based on what is happening. I am still thinking that the fuel has something to do with it. Winter gas really sucks to begin with, I really should have tried the 91 Shell but I tried another 94 Petro Canada. By the end of the week I will have run this tank out and will try the 91 Shell with the 91 V8 Tune. I do know that with the V1 93 tune that I had in it. I ran it all winter long and never had any issues.
ajpturbo. Unfortunately LMS won't even acknowledge an issue. Their take is that monitoring through the OBD2 port is not supported, and very unreliable on the Ecoboost. They will not issue a tune revision, only if I drive down there and put it on their dyno. I understand that the car will adjust and make corrections on the fly based on what is happening. I am still thinking that the fuel has something to do with it. Winter gas really sucks to begin with, I really should have tried the 91 Shell but I tried another 94 Petro Canada. By the end of the week I will have run this tank out and will try the 91 Shell with the 91 V8 Tune. I do know that with the V1 93 tune that I had in it. I ran it all winter long and never had any issues.
Did you ever check out this TSB REFERENCE.Z TSB #ASI-44315
NHTSA ID #10054975
Date Announced:
DECEMBER 01 2013
Additional Info:
How to Fix
Summary: FORD: DUE TO FUEL VAPOR LINE NOT BEING CONNECTED PROPERLY (FULLY SEATED) TO UNDERSIDE OF FUEL DELIVER MODULE (FDM), WHICH LEADS TO CARBON CANISTER SATURATED WITH LIQUID FUEL AND A FUEL ODOR, SLOW FILL, OR HESITATION OR STUMBLE, OCCURS WHIL
NHTSA ID #10054975
Date Announced:
DECEMBER 01 2013
Additional Info:
How to Fix
Summary: FORD: DUE TO FUEL VAPOR LINE NOT BEING CONNECTED PROPERLY (FULLY SEATED) TO UNDERSIDE OF FUEL DELIVER MODULE (FDM), WHICH LEADS TO CARBON CANISTER SATURATED WITH LIQUID FUEL AND A FUEL ODOR, SLOW FILL, OR HESITATION OR STUMBLE, OCCURS WHIL
panther427
New member
Have you checked the knock sensor wiring. Or bad sensor.
ZSHO said:
I had the recall performed on mine, not sure what it entailed. I know they needed to do something with the fuel pump. However, I have not noticed the other symptoms.
I did put in 16oz of Torco Accelerator to a full tank. Which should raise the Octane 2-3 points. Took it out again, and it's not as pronounced. I loaded the 91 tune, it's all but gone Only a bit at WOT and 2 KR lugging before a downshift. I honestly can't believe that "winter gas" is that different?? If it is the fuel I can't imagine that more people are not having the same issue.
panther I have 0 issues with the stock tune. Even then I did spend a fair bit of time under the hood looking at the knock sensor wires and potential sources of noise. Nada.
Shoboat the fact that it goes away when u return to stock tells me all I need to know and it's all tune....and that the torco helped...that is the stuff I would've said to u use I just didn't know if u had that up there in canadia lol.
And as far as u being surprised that more people don't notice Id say because people don't pay as much attention as u...I've honestly never looked at my spark and knock sensor at part throttle...1 because I didn't adjust timing in that area and 2 engines can tolerate much more timing advance and some knock because it's under light load....and I also wouldn't worry because u are not actually knocking it's pulling timing to prevent it from knocking
And as far as u being surprised that more people don't notice Id say because people don't pay as much attention as u...I've honestly never looked at my spark and knock sensor at part throttle...1 because I didn't adjust timing in that area and 2 engines can tolerate much more timing advance and some knock because it's under light load....and I also wouldn't worry because u are not actually knocking it's pulling timing to prevent it from knocking
ShoBoat, have you looked at your trans shifts at the time the KR occurred? I have noticed that as a possible issue on my Edge most often when slowing to a stop (no throttle input). Maybe even skipping gears. FSM points to valve body/TSS-OSS sensor involvement, among others (first line being PCM/calibration related). I have used 104+ before successfully to mitigate the issue, though not eliminate it.
Yours may be in too early a stage for all/any of the above.
Yours may be in too early a stage for all/any of the above.
ajpturbo said:
All very true, As you have already noticed that I am a little OCD when it comes to my rides
I'm not terribly worried about it, I just need to know why. I understand that the tune is responsible for the issue. I am however convinced that the crappy "winter gas" seems to have a bigger impact on the why now. I am waiting on a friend of mine to get his depot up and running for the season. Once he does I will try a fresh brew of his 100 octane no Ethanol go go juice. I ran that at the track last year with great success. I know what you are going to say. Duh it's 100 it can't pull timing with that in the tank. Well if something has changed in my car it just might. Also the stations around here will be getting their summer gas by the end of the month. I will also be interested to see what that does if anything. I plan on doing an extended log with Forscan with Knock counter and Misfire counter set up for the individual cylinders. I'll report back.SHOdded. I did take a look at that. I am not positive but judging on the timing (no pun intended) of the KR events it seems unlikely.
For reference. I monitor KR religiously, have it on a gauge that keeps the max and minimum. The winter fuel arrival spiked my KR pretty bad. Figure the tune is way more sensitive to bad fuel than the stock calibration, I mean it can run 87 stock. So putting the tune in which demands a higher octane most definitely shows that the safeguards remain with your tune.
This winter fuel issue sparked my thread about it back on its arrival this winter.
Have you checked your messages for the work in progress formula to LOR gauge. This could determine if it is indeed the fuel or something else.
Rich
This winter fuel issue sparked my thread about it back on its arrival this winter.
Have you checked your messages for the work in progress formula to LOR gauge. This could determine if it is indeed the fuel or something else.
Rich
So another update, KR is all but gone. However my misfire is back with a passion. Only over 4500rpm, and only in 2nd and 3rd. I did some logging last night. I have replaced the plugs and boots. Checked all the hoses for potential leaks. Nada. I tried the 93V8, 91V8 3bar tunes and the 91V8 2bar. Pulls smooth with no misfire on the stock tune.