My truck feels pretty sluggish under 2k - 2.2k rpm. Are there any of the "user adjustable options" that I can change to help this? At about 2.5k rpm the truck really takes off and the performance is tremendous.

I have a 2006 F150 5.4 4x4 KR with a Troyer tuned Xcal2. Other notable aftermarket items include: AF1 3.5" intake and Magnaflow 3" single rear exit exhaust.

Additional note: I have recently moved to Colorado and most of my driving is at about 6k ft of altitude (except of course on powder days when I am headed up the mountain).

Please help.

 

You do know that you lose 3% of power for every 1,000' of altitude. When you got your tune, did you have the CAI? You may need to get a tune specifically for that.

 

Hello and welcome!

Although I think it's best if you can reach Mike to discuss this directly with him, I can attempt to offer some suggestions ....

It's possible the altitude change is part of this.

What octane are you tuned for?

Are all the tunes doing this (if you have three).

Have you datalogged the truck and sent this info back? AF1 3.5" intakes can be finicky to tune for without this feedback.

I'm assuming all appropriate maintenance is up to snuff.

Much smarter folks than me will be along to help (c'mon guys lol)

Good luck!

Regards;

MGD v2.1c

 

Yeah, I know I'm going to lose power based on the altitude, so I don't expect to have the same performance here as when I lived in Oklahoma. I just really don't feel like I have very good throttle response until it gets past 2500 rpm. I bought the CAI, exhaust, and tuner through Troyer at the same time, and the tuner was programmed for the modifications.

My 3 tunes are 87 Performance, 91 Performance, and 91 Towing. (We can't get 93 octane here in CO.) I run 91 Performance nearly all the time.

I have not datalogged the truck, and am not sure I really even know how to do that. I'd have to go back and read the directions. I have had all the modifications since I lived in OK.

As far as I know, the maintenance is current. I try to follow the maintenance manual and the Troyer Performance maintenance schedule religiously.

 

Okay, OK ( lol - sorry, could not resist).

You did not mention if you had tried any of the other tunes to see if they react similarly.

Also - I think that, if you do happen to talk to Mike, that he will almost certainly insist on seeing data, as that is the only way a tuner can tell what is going on and how to fix it remotely.

There was a member on here with similar issues - truck was tuned for the 3.5", but ran pig-rich. Only a couple of iterations of logging & tunefile revisions helped to get it fixed.

Miles on the front O2's? Just curious.

Good luck - TP wll almost certainly need to be in the loop - there are no benefits in trying to fix this with custom end-user settings - especially with that intake.

Not anywhere near enough granular control. And no data to support any changes - you could end up making it worse. For all you know, the PCM could simply be pulling timing for some reason. Logging will reveal that.

The datalogging instructions you have received are extremely comprehensive and well-written. Hey, I mean, I could do it, so it should be cake fer you, lol.


Best of luck! Please keep us posted - I'd really appreciate knowing how this gets resovled!

Thanks!

Cheers
MGD v2.1c

 

Thanks for your help.

I tried to do the datalogging tonight, but...most of that stuff is jiborish to me. There are 1,266 different items that can be logged. Which ones and I supposed to log? I guess I'll just have to get in touch with Troyer tomorrow.

I so rarely run anything except 91 performance, that I don't really know if anything is different on the other tunes.

I have 53k miles on the truck...as far as I know, the 02 censors have never been changed.

 

Has it always run this way since you got the tunes or did performance fall off over time. You might try cleaning the MAF and see if that helps if it developed that flat spot over time. If its always done it, then you will need to data log. I know what I would log, but Mike needs to tell you what he needs to see. But do what MGD said and load your other tunes and see if it does it, because that will be the first thing they want you to do.

 

I talked to a very helpful gentlemen named Glenn at TP. He suggested cleaning my air filter, changing the fuel filter, and resetting the computer (by unplugging the battery temporarily), and changing the brand of gas I have been buying. I have not yet had a chance to change the fuel filter, but I have done the other things. I notice some difference, but not much. Do you think part of the problem is the ethanol gasoline? In CO we can't buy anything but ethanol gas. Is there anything tune related that should be adjusted do to this?

 

Well Hello again, Mr. OK!

Yessir - 10% Ethanol gas does have a different stoic point than straight gasoline. As such, there are some slight tuning adjustments that are made to optimize for this, but I doubt it would account for the bulk of your issues.

Another question for Glen perhaps? Yup - those folks are indeed helpful!

I'll reiterate that some datalogging would go a long way in helping here... just fyi. Forgive me, lol.

Good luck , as always!

Cheers!

MGD v4.0

 

Congrats on v4.0, MGD.

I clipped this from a tuning board, may be helpful.

Even those of you running standard pump gasoline are probably getting a mild alcohol blend. By law, most gas stations today are now allowed to sell blends of as much as 10% ethanol as "gasoline". The ethanol is being used to displace the MTBE (methyl tert-butyl ether), which has its own environmental and health concerns. It used to be that stations were required to post a sticker on the pump declaring the alcohol content, but that's no longer happening. Some regions were quicker to adopt the maximum allowable ethanol content in the pump gasoline. In my travels and discussions with shop owners and calibrators across the country, I've found that almost every station can be assumed to be selling some alcohol blend unless stated otherwise. In most cases, this means assuming a blend of 10% ethanol. Any addition of alcohol blends to the gasoline will shift the stoichiometric balance point. The more oxygen carried by the fuel, the richer the stoichiometric point will be. Where E85 has a stoichiometric ratio of 9.85:1, E10 (most pump gas blends) will balance at about 14.2:1. This means that tuning to an assumed pure gasoline composition with a stoichiometric point of 14.64:1 may include a 3% error before the engine is ever started. The wideband oxygen sesor will still typically display "14.64:1" at lambda=1.00, even though this is really an actual ratio of 14.2:1 with a 10% ethanol blend. Three percent may not sound lick much, and it really isn't, but the idea behind engine calibration is to get all variables as close to optimal as possible. Leaving a 3% error in the fuel's stoichiometric point just makes tuning the volumetric efficiency table, startup fuel, and transient fueling that much less accurate. It's a good idea to just adjust at the beginning before baking that error into every other calculation later on.

 

Glen indicated that a datalog was not necessary at this point since I have really done very minor modifications to my truck (exhaust and intake). Datalogging was more necessary when SC or other major modifications are done. He told me to take his suggestions, and if it doesn't improve, call them back and they would take a deeper look. Since I haven't changed the fuel filter yet, and I haven't driven the truck very much, I haven't been able to make an accurate assessment yet. I am headed up the mountain for some snowboarding this weekend, so I should be able to make a better assessment at that point.

I know that in OK, the gas stations advertised either..."up to 10% ethanol" or "no ethanol", so I always assumed that the "no ethanol" stations really contained NO ethanol. In CO, all of the stations specifically state, "up to 10% ethanol".

I am still leaning towards believing that there is some sort of A/F ratio that is incorrect...could be the gas, the thin air, the fuel filter, or the tune...not really sure.

 

This assumption is the most obvious, and most likely issue.

At altitude, vehicles tend to run much richer then they would at sea level, even when they are designed to compensate for the elevation. A new tune set up for your current altitude would bring back most of the lost performance you have experienced.

Thanks
Mike