Tacoma - OVTUNE - VFTUNER - Update Info and Original Development

Have no low or high RPM stumbles after 1.01b even when 4 wheeling. Do they go away when you turn traction control off (stopped hold button for about 3 seconds)? Can you describe in detail how they happen and what they are?

 

I can make it do this everytime if I wanted. From a stop, if I give half or greater throttle while still in 1st the truck shutters briefly between 1800 and 2000 rpm. d mode. ect or no ect. i dont use s mode unless on hills towing. the shutter is not bad, almost feels like slight wheel hop in sand. It does shake the truck slightly for a second or two. techstream records no misfires and the timing does jump slightly at that time.

 

If anyone here knows how to read the data I have some quick runs saved

 

I always assumed this was the truck trying to go for 2nd and then deciding that your throttle input warrants 1st... in the time it took you to read what I just typed lol

 

Did this late Tuesday. No response.

 

The stumbles I'm describing are stutters felt when you're driving along at speed with the gearing putting you around 1200-1500 rpms. If you then give it just enough gas to try and accelerate while not giving it enough to initiate a gear change, the power surges, feeling like a miss. Give it just a hair more throttle so it downshifts and it goes away.

 

Checked intake hoses are tight?

 

Yes, the stumbles are documented far and wide across members here.

 

I know what youre talking about and I noticed it was gone before the tune when running 93 octane. I think it's knock related (either false knocks detected or actual knock).

 

I've been having that exact issue, but it's sporadic, took it to the dealer and neither the tech or I could get it to duplicate the issue. The tech tried to tell me I was feeling bumps in the road.

 

I wonder if this low rpm stumble you are describing is the same shudder I get when letting the clutch out... I used to think the clutch was grabbing bad... But perhaps it's the truck?

 

Who is using this with 4.88 gears?

What is your experience? Have you noticed that its given issues?

 

Has anyone encounter this problem. From 1st to 2nd and 2nd to 3rd gear, if I take it to rev limit, right when it upshift the truck will surge/stall for a sec or so. It feels like fuel cut off or somthing. It only happen on both tune files.

 

I'm getting a Trojan virus warning when I am trying to download the pcmflash 1.1.83, anybody else seeing that?

 

This is normal. Fuel is cut a bit between shifts as part of torque management, to not kill your transmission. Lexus does this too.

 

Not me. Either it's a false alarm or your pc is already contaminated.

 

Had to make an exception for the zip file I guess

 

I had no warnings using windows defender. Ran a scan too, no threats.

 

I dont think you read your screen correctly. That pop up from the browser is just a "possible warning" not a true flag of a trojan caught. If it were a trojan, you would not be able to bypass anything.

 

Quick question: I just received my kit and I believe that I heard that I don't need to
download some of the drivers. If this is true, which step do I pick up with on the OV website instructions? Thx!