I ran the Troyer tune for over a year and recently got my VMP tunes a couple of weeks ago and have been running the 87 performance tune since. My VMP tune does the same exact thing you are describing and it drives me crazy. I wasn't sure exactly what it was so I made a post asking if others had the same HP drop at around 40-45 mph that I was experiencing, then I found out it was the TC issue.

I think I'm going to switch back over to the Troyer tune tomorrow and see which one is worse in this area. I don't recall noticing it as much with the Troyer tune as I do with the VMP tune. Of course I can't remember what I had for dinner last night either so remembering what my Troyer tune felt like after a couple weeks on the VMP tune is probably stretching my brain capacity.

To the OP: I am still working to get my truck on a dyno so I can at least compare the two 87 performance tunes side by side. The seat of the pants feel though I can tell little difference between the tunes.

 

Wow, really? What is seat of the pants to you. Full throttle, leaning into it pretty good, or just daily driving?

My main comparisons I make with the tunes are probably in closed loop since I'm just driving normal from the lights and giving a little extra to pass someone. I've datalogged a little and I found I had to really punch it before the open loop flag got set. So I'm sure the sluggishness I'm feeling below 3000 RPM on troyers tune is in closed loop.

Geez, it must have something to do with my truck. Anyone have any suggestions for me to check/clean/replace? I've already cleaned the MAF (with approaved MAF cleaner), replaced the O2's with Bosch OEM part number, changed the fuel filter, and I use good quality gas (and I believe it does not have 10% ethanol).

 

Well, it was bound to happen. I figured out my problem. One of the new O2 sensors I just installed a month ago threw a code this morning. So I pulled it out and returned it. Put the replacement in and put the Troyer 91 tune in. It was terrible!!! I almost got into an accident. The throttle response and HP below 3000 RPM was unbelievably bad. Then I remembered that I've been using the VMP 91 perf for a while now and thought maybe I should pull the battery for 5 minutes or so and reset the addaptive.

HOLY CRAPAMOLY!!! This trucks halls some serious A$$ now. Wicked throttle response below 3000. Launching is amazing. Shifts are just where I'd want them to be, and the truck gears down on hills perfectly. That was one of my other problems before was the truck wouldn't gear down on hills unless I really trompt on it. But all that bad crap is gone now. Mind you the adaptive is just starting over so it will settle down a bit later, but it is miles ahead of what it was and is definitely better then stock now. The truck is snappy and responsive like I expected. I'm very happy.

My truck had the original O2's in it with about 100K kms on them. Mike recommends changing them every 30-50k miles. I will definitely do that from now on. Who would have thought an O2 sensor could make that big of a difference. But the weird thing is that the truck used to bog alot even in open loop so I'm not sure what happened. All I know is I got the feel I was expecting when I bought these tunes.

O, and the droning is not near as bad and the momentary detonation mike programs into the tune is not near as bad either. It still won't light up the rear tires though, but it has a much better head snapping factor to it.

 

i have had troyer and vmp mail order tunes.i liked the troyer tunes when i had them. i had a few issues with the truck(not tune related) and did not want to wait. i ordered the vmp tunes and have not nor will ever look back. i like the characteristics and the power of the vmp tunes. i have also consistently ran better times with them also.

 

interesting- it must be my code-fdy2, or changing out o2's every 30k miles, but under 3krpms is where my tune really shines-throttle response and part throttle tq is amazing,maybe because it's a 2 valve engine?

 

No, my 3v has muchoballs on the low end too. Not bad high end either but under ~3k is most impressive.

 

Hmm, that sucks. I want to get rid of this problem.
I know pretty much everyone complains about it, and I have heard of some people say a tune totaly got rid of that little problem...but no such luck for me.

This problem makes me wish I had a pre 04 with a 2valve at times. Punch it and go...none of this crap.

 

I'm not very happy with my Troyer Tune at all. Ever since I have installed them I have had nothing but problems. And transmission problems at that. I have a really bad rattle in my tranny from 50 to 60 and when I am coming to a stop. It sounds horrible. But when I un-install my tune there is no problem. My truck also seems to have to power at all from like 40 to 60. It seems like I have to press the petal twice as hard.

 

Is your truck possibly 4WD? If so, you might want to check out this thread: https://www.f150online.com/forums/ki...ound-like.html

You MAY have the same vacuum leak problem that was found here.

- Jack

 

I doubt that's the problem. John would know if it was the hubs ...

 

Lol well number 1 it is not 4wd, and number 2 I dont have any cats hahha. It is def a tranny problem man but thanks for the suggestions

 

The problem was NOT the cats. It was a vacuum leak that told the 4WD to engage, only it didn't engage properly. The rattle noise came from under the vehicle, and occurred under load.

- Jack

 

[QUOTE=spike747;3321409]Actually, I'm trying to say in a nice way that the differences are not minor. My tunes at least feel completely different. VMP's tip in pedal response is amazing and extremely snappy compared to stock, but really fades away after 3000 RPM. Troyer's tunes pull really hard over 3000 RPM,


So far with limited drive cycles and the computer still learning this pretty much sums up how the tune feels. Seems to be a bit of a lag at freeway speeds trying to go WOT but from a start the throttle response is much better.

 

Observation after 5 days with VMP 87 Tune:

Positives
Better throttle response at low Rpm's than Troyer
NO noticable problems at elevation

Negatives
Shift firmness less than Troyers
NO passing power on highway
NO throttle response on highway...long delay before downshift


Have not tried 91 Tune but will after a couple tanks of 87