Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

Don't want to get banned

 

I've had this same thing happen, once, same tune, same octane, not even three quarters of the first tank used since flashing.

 

I have about 300 miles on the 87 AT tune. Only thing i notice is it holding gear up into 65-80mph. If i let off the gas for a sec it shifts up.

Keep in mind the truck has a warm-up time of 30-60 seconds where you can hear the RPMs settle. I feel this is a MUST for this truck based on how smooth it is after you let it warm up.

No surging or anything like that mentioned...yet

 

What's your ambient temperatures and how long since the engine was started?

I get this while coasting down hill for the first 10-15 minutes of driving ever since new. Coast up to 15-20mph, give it gas and I'm revving in neutral. Give it more gas and it slams into gear. I had this before the tune. I want to say it's a tad bit worse with the tune but can't say for sure.

 

I haven't posted here in a bit. I'm one of the few people underwhelmed with the new tune. I flashed 1.03 and was pretty "meh" on it. The previous tune made a significant improvement to my stock truck in terms of throttle improvement so I was looking more for shifting improvements. Well, I like the throttle less in 1.03 than in 1.02. The overly aggressive tip-in specifically. I did not put that many miles on the tune (maybe a couple hundred) and then parked the truck and started driving my newly acquired 1996 4runner exclusively for a few weeks to see if I could live with that as my DD (I think I've decided I've gotten too used to modern creature comforts lol , but I digress). Well, this weekend we had a trip planned to Chattanooga, so couple hundred miles of HWY work so I could get a real feel for the transmission improvements, so I decided to fill it up with 93 and flash the latest 91 tune. It didn't drop on Friday, so I just left 1.03 87 in and hit the road Saturday AM. My initial impression was that the transmission holding 6th (on slighter grades) and 5th (on more significant grades) is definitely improved...but I still don't consider it acceptable. I'm thinking possibly the 91 octane tune, with it's increased power would make it acceptable, so I'm looking forward to trying that as soon as this update drops, but I discovered another problem that I have not experienced before.

Unfortunately during my trip we ran into major traffic on the interstate for about 30 miles. The kind where it can be stop and go where you can get up to 40-50 mph (this interstate has a 70 mph speed limit that has a typical 80 mph cruising speed), then need to brake down to 5-10 mph, then you need to get on the gas again. Well, when this happened, (the deceleration from 40 to 5-10mph then getting back on the throttle), a good 30%+ of the time when I went to get back on the throttle I would get no response, like the truck could not decide which gear it was supposed to be in, and then when it did go into gear it was with a noticeable "thunk" and VERY jerky, enough to snap my neck back a little and elicit comments from my wife. Not pleasant at all and it felt like it was mechanically very unpleasant for the truck. Fortunately I don't hit that sort of traffic often, but still there is no way I can leave this as is. I will definitely try to replicate this scenario when I flash the tune update to see if it gets any better. After my last experience with 1.03 (even with it's gear hold improvements) you could call me overall disappointed with it. Hoping this new update with tip-in changes also helps with what I experienced above.

 

It's upper 30's, low 40's at night here. The word that comes to mind is: carburetor. The colder it is, the worse it feels. Starts getting better after 3-5 minutes driving and glorious after 15 minutes. But until then - 2 cycle weedeater that's been sitting all winter.

I think Mat's looking for new office space. He needs to move somewhere colder with bigger hills.

 

I to experience this issue, also when turning corners and giving it gas it will fall flat on its face for a brief second.

 

I'm thinking @OVTune is aware of this issue, but I haven't been following the thread that closely the last few weeks, so I'm tagging him just in case.

 

sorry to hear, I am working on some updates. I am still unsure why some trucks experience some issues and other trucks run fine. I have never experienced anything like it in the R&D truck.



** for anyone who does experience any issues (other than idle surge) please post all of your modifications as well.

temperature plays a very big factor with these trucks, like any vehicle. When the engine and transmission is cold it is going to drive rougher, shift shittier, etc. There really is no way around it, the components are build to run at operating temp.

 

Thanks Matt, I appreciate the effort and response. My truck is 100% stock with an updated crank position sensor (not on the recall, I did it pre-emptively).

 

I can get this to happen on demand and showed it off to a dealer tech and he said the same thing. Therefore, not blaming the tune. But hoping you may have some magic.

Edit: Stock vehicle + sliders and canopy.

 

I wonder how many people on here that are having problems let their truck warm up for at least 30 seconds?

 

If you're moving to the east coast like you said a few days ago I know of an old speed shop in jersey that has/had it's own Dyno, I know the guy who used to own it I just don't know if it's been sold yet

 

Less than 30 seconds for me, aside from pulling out of the driveway (uphill), I coast downhill for 1 mile on a 30mph road before my first meaningful application of gas.

 

I c

I can tell you now thats because you gave the truck gas right in the middle of it downshifting or upshifting. The truck didn't know how to react until you gave it more gas so it assumed you wanted to upshifting and it did just that, only it did that while at 3k rpm

 

This. When I tested Mat's 6MT test revision for 1.03C, I came to the conclusion that letting the truck warm up for even just 30-60 seconds made a world of difference. In order to create a single instance of stutter, I had to cold start and immediately drive off. Allowing even a brief minute to warm up resulted in no issues whatsoever.

Now, I don't want to make light of people's issues because they ARE documented, and it's been well established that my own truck is one of those that tolerates the OV maps very well, with no problems, but that being said I did come to the conclusion that allowing the truck time to warm up resulted in differences. Maybe not drastic ones in my situation, but I still managed to establish that zero warm up time at all occasionally allowed me to produce an instance of stutter as opposed to none if I gave it the aforementioned 30-60secs.

In addition, not reflashing the moment I had an issue like some people have been doing helps. One, Mat has said multiple times to not keep reflashing, to let the tune "settle in" so to speak. I can confirm that the initial 50 miles of a flash is more of a learning period and getting through that resulted in me not even being able to produce those singular instances of cold stutter I mentioned above.

Does this apply to everyone? No. But I wonder how many people have seriously not given it a proper chance as of yet.

 

The moment you put your tranny in DRIVE it defeats the whole purpose of the warm up. If you start your truck and wait 30-60 seconds you can hear the RPMs settle in a big way. The exhaust, idle and everything else seems way more "ready to drive" if you listen to it.
The exhaust even looks different when warmed up on a cold day. (I live in NW)

 

Thanks @mZiggy,

I always let it warm up (30secs) and NEVER experience ANY surging or lack of power on throttle whether during a turn or not. In fact, I was taking a turn yesterday and since I am still getting use to the throttle I accidentally broke the tires free for a sec thru the turn until the Trac control kicked in

 

Agree. On the rare occasion I've let it idle for a couple minutes, it's night and day. But of all the cars I've had, it appears to be the most sensitive to warming up.

 

@OVTune

Truck details and mods:
2016 TRD off road 6MT. Ecu is 04b11.
Mods: removed the air intake "charcoal filter" (The filter that is attached to the air intake lid).
275/75R16 bfg ko2.
6112 front Bilstien shocks set to 5/4 clip settings. Rear has 5160 shocks with 3 leaf Add a leaf. Over all lift is ~3 inches.

I have never experienced any issues on any tune file I have run other then very slight stutter when engine is dead cold. Once warm, it's a non issue.

Currently on test file 1