vF Tuner for the 3.5L Tacoma

Stock wranglers on my truck and as light as the day I drove it off the lot. Bogs through every turn. Hesitates to shift to lower gear if at all. I’ve driven three other third gens and none do this. I’ll get to the bottom of this eventually because I love this truck besides this issue. Perhaps I was hoping for too much from the tune. It has had zero effect on this. But lots of improvement in other areas.

 

Try turning off all traction control and see if it still does it.

 

wonder if your experience there is specific to ATs. i cannot find anything in driving that suggests this in a MT. maybe it's part of the code but it's not obvious over here if related.

 

I highly doubt that is the pump causing it.
I narrowed it down to specific conditions, but he is saying I'm crazy.

 

Beating my own , but have your tried the LV and AT Resets? I am not 100% sure that it will help with the idle steering issue, but it might help with the shifting.

My steering will drop the idle revs and reduce rack boost, but I have to be coasting in 1st near idle. All things being equal for me, it is something that I would not call an issue or ask a dealer about since it is pretty minimal and doesn't stop me from doing anything. But then, I have driven cars with blown racks and didn't complain too much there either.

 

I can replicate it... because my truck does it every time I make a turn right or left. With or without tune it’s exactly the same. Exactly.

I’ve tried 4 different tunes in ECT and S mode for each one. Same result every time. I reset AT/LV each time. The tune doesn’t touch it sadly

 

Sorry to hear that.

Hopefully there is a fix someday.

 

Who said you are crazy? because I didn't. I only said it doesn't make sense for RPM to drop only from a reduction in cam advance.


I am quite sure that there are throttle compensations when turning. Throttle compensations exist for everything.

 

Thanks man, after I try the upcoming AT performance tunes to see if it makes a difference, I’ll just start playing with VF to see if I can make it tolerable. Can’t possibly make this issue any worse than it already is lol

 

What I see is a rpms drop close to 400, while tbe accelerator and throttle go up. There is no shifting ,TC dancing going on at the exact moment
There are intake/exhaust VVT changes are happening at the same moment rpms dip.
Are they triggering the drop? Mat rejects it, saying it is impossible.
the steering pump theory is bs. On idle (~600) it does make a change, but being at 1700+ rpms, rolling through Y intersection and dropping 400 on a slight deflection of the wheel. Please...
Log the data and lets compare.

 

You're welcome.

If the 2.0 Tow tune is anything like SFOB, you're in for a treat. Even with SFOB though, it is said that there is a very small bit of the faux Atkinson left. The torque with it gone is just so freaking nice.

 

I only reject the idea that VVT alone is causing a drop in RPM.
Think about the actual mechanics of the engine. Mechanically, it does not matter what angle the camshaft is at, rotating the camshaft to a different angle (which is exactly what the vvt is doing) cannot, literally mechanically, cannot make the engine speed drop by 400 rpm.

There is a chain attached from the crank to the camshafts, and the camshafts can rotate a certain amount of degrees independent from this chain.

mechanically it is not possible to rotate the cam from x degree to y degree and have the CRANK lose 400 rpm.

 

well there it is.

 

Are you referring to tranny torque model tables?
If yes, which way we are changing the data?
Do we use the table to get calculated torque or there is a formula?

 

damn AT

 

You have the patience of a saint.

I don't think you need to be teaching Autos Remedial 101 though . . .

 

The ATs will get the goods also. The laughs after the first jabs at the go pedal will be heard.

 

I'm sorry... what's SFOB?

 

performance tune for the MTs. Super Full Otto v.B

 

Super Full Otto B. The 'B' is from the old 1.05B days. The upcoming AT Tow tune is supposed to be similar.

It was said that skinny Tacos would lose MPGs running on the fat kid tune, but a lot of us are getting our best MPGs with SFOB.