The reason why you need a tuner! The stock tune has a 1.5 second hesitation or bog when cruising at part throttle and 40 mph and you go to wide open throttle. The engine torque actually decreases. I find this completely unacceptable and have taken the truck in for TSB 6-19-03 and the reflash fixed it for a couple days but then it came back, I took it to another dealer and they said it was normal. I emailed Ford and they said take it to the dealer. I think it is extremely dangerous when you actually lose power when you might need it to avoid an accident, accelerate from the on-ramp, etc. I'm surprised no one has been in an accident and sued Ford! I really would like to talk to the engineers who tuned the system this way and get their explanation why they used software and electronics to decrease torque and shift pressure at WOT to save the transmission or for emissions or for whatever reason they have.

I know I posted this one other time, but it was under an unrelated subject title.





The data was taken with an X3 using the SCT Livelink Version 4.0 Build 17. I took this data the first time I got my tuner and data logger working and only wanted to verify what I already knew. The tuner definetely took away most of the hesitation. I am sure the experts on tuning can go into much more depth on what, why and how the problem is fixed. All I know is I can finally sleep at night knowing I have a nice engine/tranny tune to couple the rest of my amazingly engineered truck.

I think they should add a tunes section to the "Truth about Trucks" and end the debate once and for all!

Best Regards,
Tyler

 

I don't think its all that dangerous, though I do find it interesting. I wonder why it does that?

 

I have no problems accelerating from 40 mph...


I locked my rear axle today in front of a tailgater... Makes'em try to figure out how I pulled that one off...

I popped it in 3rd while doing 60 mph... and with 4.10 rear end, that driveshaft will just lock right on up.

 

This is the whole reason I started modding my truck. I almost got into 2 accidents because of the stock tune. I went to the dealer twice and another one once and got the same answer after they checked the stock tune. Finally the general manager pulled me aside and told me to get a programer and return it to stock before I came in for service. I havent looked back since then.

 

hmmm...i've never had to floor it wot to avoid anything, certainly not to merge into traffic

i hear a lot of complaints about this, but it's never bothered me...my old chevy 350 had much more throttle lag than this ford

 

The data doesn't add up.

1. The stock tune you have holding ~42mph which is 4th gear.
2. If you go WOT at the speed you will most likely end up in second.
3. Now for a 4-2 shift to happen it will drop off tons of spark.
4. A 4-2 shift will also slip past 3rd at a commanded %
5. So we can say a 4-2 shift is hard on the tranny becuse we are going from a 0.7 multiplier to a 1.55 multiplier for the gear ratio of the tranny.
6. The SCT tune is just going from 3-2, which is why its a very quick TB ramp open with modified shift pressures/TQ reduction as well.

If you want to have comparitive data do the exact same runs from 45mph (4th gear) and 35mph(3rd gear) with cruise control on (wait at least 10seconds making sure the TQ is fully locked, as there are time delays) and then mash into it.

When you log you ALWAYS want to log at least, LOAD, SPARK, #/min, mafv.

Use the two PIDS in the graph as well as those above. Stay into the throttle for at least 5-7 seconds to complete the shifts.

 

I think i got your e-mail last night and it went to my phone... I tried to open it and when i did it cleared. So try again if that was you.

 

I have a bunch more data from those runs with the parameters you suggested logging, I just put those two plots up here.

I will send you the raw data i.ride and maybe you can take a look. For some reason it has 4 data points for the same time step? I was logging a bunch of random parameters so the data may have clipped.

I will take some new data with your suggestions.

Like I said this data was taken the first time I got the tuner and all I was looking for was the torque drop to go away when going to WOT after cruising at 40 mph with the new tune installed.

I did send you that email. I will try again.

Tyler

 

I don't have any data to post, but I bought my truck in 3/05 and it had a terrible hesitation under heavy acceleration. It caused me to have close calls on two lane roads when attempting to pass. I took it to the dealer and told them what was happening and they did the reflash. It solved the hesitation problem, and though it ran better, it was still a dog, so later, I purchased a tuner and it has been great since then.

 

My transmission was slapping into gear so I had it reflashed. I now have this same problem and it is rediculous. I drive at least 100 miles per day and it getting really annoying. Dealer says there is not another update for it. Guess that's why I bought an extended warranty. I just hope my wife doesn't have to plan my funeral over it.

 

I have been running lvl2 on my edge evo for a about 6 months, I had to take it to the dealer for a recall brake booster line today and on the way to the dealer on the stock tune the hesitation was horrible and was audible thorugh my exahust. My truck also died in a intersection for no apparent reason the other day and the tech at ford took it for a road test and said nothing about the hesitation and could not get it to die. He said everything is fine. Its still under warranty and is throwing a P1000 code which I have learned is the ford tattle-tale code. While under warranty should I have my computer reflashed? I just did not want to push the issue because i have heard some dealerships flag the VIN as having been programed.

 

I had this same thing with my truck... although I usually wasn't going WOT... I'd see it just when cruising at city speeds (about 40 MPH) and trying to accelerate. There would be a big lag to drop down 1 gear and get some speed. It was also annoying on hills that it wouldn't want to downshift and would act sluggish.

I had Ford reflash the PCM to try to fix it, but it didn't. Awhile later, I found an Edge for a good price used. That took care of all my complaints. I run it on the stock level 2

As far as "dangerous" and leading to a "lawsuit"... not too sure about that... if you know how to drive then you'll be just fine. But yes, it was annoying.

 

I considered mine dangerous in heavy freeway traffic and on two lane roads. You should never have to take into consideration that the vehicle won't respond when you need to accelerate. My dealer reflashed mine and that solved the problem. That was prior to my getting a tuner.

 

I was under the impression after reading the warranty info that the warranty is voided if the truck had been lifted. I guess I was wrong in this assumption?

 

I think if it was lifted by a professional installer it does not void the warranty, I have already had my 4x4 switch replaced under warranty and nothing was said about the lift. I work for a professional installer and we lift the trucks for this dealer so maybe thats why. It probaly varies from dealer to dealer but my dealer loves warranty work because ford pays for it!