Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

Great to hear you found peace with the AT. However I do not agree with you about the startup not causing surging. My Subaru does it too if you don’t let it warm just a bit

 

I seriously don't get the surges even cold now... but then again I generally start-up and let it run for about a minute before I take off, a bit longer in winter temps. I do think my garage messes w/ my truck in the winter especially though... with a deep freeze and hot water heater in our garage, it's always warmer than outside. Most noticeable in winter when the garage will be 55 vs. outside temps below freezing = confused truck!

 

That's a high idle, not a 'surge'.

Example. My foot on the brake with a even steady pressure, idle at 1100rpms. Vehicle is not in motion, complete stop. Next thing you know the truck lurches forwards and rpm's tick up, all over powering your steady brake pressure. The rpm's immediately come back down to the 1100 or so and that same brake pressure holds the truck still. That is a surge. That is a tuning issue.

 

and surging is dangerous. Imagine how many accidents or worse, pedestrians getting hit would occur if randomly your vehicle just lunges forward for no reason. the tacoma's v6 isn't some high tempered, blown, high lift cam, monster v8. if my surging continues I will have no choice but to remove the tune. I would hope @OVTune will get this addressed immediately as this is unsafe.

 

I believe it’s been proven that engine power cannot overcome braking force. If you’re applying your brake (as required to start the vehicle) there should be no danger from surging.

Just sayin’...not insulting or being a jerk.

 

Surging has been fixed in 1.04.

 

Yeah, I've zero surging on 1.04, where I did with 1.03.

 

I'm running 1.04.

 

Hey guys, trying to update to 1.04.
After I get the decryption key entered the only files I see are for 04b03, where as I am on 04b02. Am I missing something?

 

Incorrect statement.

Do you slam on your brakes full force to come to a stop at a light? No, didn't think so.

Do you have your foot full force on the brakes while in D at said stop light? No, didn't think so.

So making a blanket statement that engine power does not or cannot overcome engine power is beyond ignorant.

If the vehicle upon initial startup and placed in D has a target idle of 1200 rpms. It will try to hold that idle even when the transmission is in D. However the load of the transmission lowers the rpms and you apply the brakes enough to keep the vehicle from moving. Call that force Y. If then randomly an engine surge applies more power (Call that force X) to again reach that target rpm, it will over come Force Y (the brake effort currently applied). At which point muscle memory kicks in and you step on the brake harder. However, that is not normal or acceptable behavior.

 

If you're having a problem or something you want me to look into, first place to go is to me. Details like what version, what octane, what mods you have...

 

if you downloaded 1.04 the file type is .hex instead of .bin. change the file type and the pcm flash tool will see the new tune file. Not sure why OVTune did this.

 

You do not reply to emails.

 

pm me your email address. I am getting back to everyone as quickly as I can. I haven't heard from others that they are having such issues on 1.04

 

I see. Interesting

 

I'm going to see if i can reproduce the surging upon startup to D based on consistent conditions. If I can, i'll video it and see if i can capture via tech stream at the same time. This may only be a cold / cool start issue that will be more difficult to reproduce.

Tune is 1.04 91 on a 17 OR auto. I think the ECU is 04B03 but I'll have to check tonight.


What I don't appreciate is folks just blatantly saying its fixed. We've seen many examples of variations from truck to truck with some folks having issues while others do not. Contributes nothing to just say it's been fixed when there's an obvious example of it not.

 

to be fair, it's also contributing nothing to make blanket generalizations such as "you do not reply to emails", which in fact is also an "Incorrect statement". you need to chill a little bit my friend. everything gets worked out around here and nobody's f'ing with you.

 

I don't think anyone is saying anything to try to make you sound wrong. What they are saying is the issue that existed on 1.03 has been resolved on 1.04.
However, there are still certain scenarios that can happen that may make the truck do something like what you experienced.


If the surge is the rpm jumping up because you are going to D immediately on a cold start this actually does happen on stock trucks / stock tune. Just not every truck.

 

@OVTune

Not to be a dick.. but can you give us M/T guys a quick update on... the update lol?

 

Mat, I email'ed you Monday night regarding the gear 2 to 1 downshift roughness on 1.04 91 04B03. Wondering if you received the email?