memario1214's JAFR Build

That is pretty odd. I see why you suspect the TPS... The TPS is pretty sensitive though and has 2 sensors on the skinny pedal and probably 2 at the throttle body so I would think it would throw a code.

I had mine throw a code when I landed a jump hard enough to make the throttle body jar open on landing when my foot was off the throttle so the motor kicked into limp mode until I shut it off and restarted it.

 

Nice!

 

Hey Colton where did you mount your AFR sensor bung?

 

Happens to me too

I suspect it has to do with the passive braking, the reflash, and majority vote.

As u know, letting off the gas or even backing off to maintain speed when ur in 4th or so, the truck automatically engages the passive braking sometimes. This can be part of the issue.

Thinking "oh, he must be coming to his exit and Thats why he backed off the gas, let's help him slow down with engine braking....... Whoa, shit he wants to maintain speed let me trip over myself and hiccup a few times and find the right gear"

Maybe combined with the fact that majority says "I want a smooth shift" just like " I want a smooth driving truck.... Like a Camry with a bed"... Toyota has purposely made the 4th-5th-overdrive nice and sloppy.

And maybe another possibility is the reflash allows more slip in general to reduce shift shock and maintain a smooth (sloppy) shifting characteristic. Making the truck less aggressive even with the blower.

Why? I dont know.... Maybe because the performance game was lost long ago with the jza80 platform, besides the LFA...... I dont even want to include the FRS because I'm not sure how much of that is toyota vs Subaru.... I like the car, but I feel its a lot more subi than Toyota..

Maybe the sloppy shifts are to ease the drive line stress thats multiplied by the supercharger?

I dont know...... These are just ideas floating around in my head.


Toyota has def made things tamer and safer as far as ride comfort, performance, mileage, abs, vsc, ect.

Even the reflash is safe..... Look at all the soot and our afr.

 

Ok cool. Thanks! Do you know if its in front or behind the o2 sensor?

Read that that's where Gadget has his too. Said its the easiest place and that he just matched the angle of the o2 sensor. But didn't specify front or behind.

 

Awesome thanks. As far as the angle, they say 10 degrees. What did you do with yours?

 

Good to hear, hopefully all stays well.

It is about 0* here now and my battery has definitely noticed. I'm wondering if I should replace it now or see if it will last until next winter. haha I checked the date and it is about 6 years old or so.

 

Lucario Runner's T4R actually responds differently with two people in it, on the track, than with one. It holds back power, and possibly something with the transmission being slower. He would know best since he was driving.

 

Why not straight? I mean, techinically it wouldn't sit in condensation either. It would be above the moisture. Unless it sits deep in the pipe.Right? But I am gonna do it at the angle. Probably just match the o2 sensor

 

I also do the negative off the battery when the shifts get sloppy over time.

Eventually it turns it a slipping reving mess at random again.

I had it do this somewhat when I had a tech with me and he was plugged in.... Nothing caught his attention on the screen.

Imma assume IPT VB FTW..... Someday.

 

Ill let ya know Saturday.

 

I also do the negative off the battery when the shifts get sloppy over time.

Eventually it turns it a slipping reving mess at random again.

I had it do this somewhat when I had a tech with me and he was plugged in.... Nothing caught his attention on the screen.

Imma assume IPT VB FTW..... Someday.


Just remembered... Its usually worst when I pass someone.. Say we have a tourist going through our highway 41... Its a canyon with one lane each way with no passing lanes, but plenty of broken double yellows designated for passing areas.

Sometimes they will do 35 to look at the scenery and the limit is 55.... I'll mash the gas from say 40.... Pass safely, let off as soon as I clear their front door and Thats usually when the trans does its little dance.
Doesnt matter if I let off the gas fully or just partially in an attempt to get back down to 55 and cruise.

 

Mine has been having issues as well. Now that im reading your guys' descriptions.. im certain its the same thing. At first, I thought it was starving for fuel or something. There was a delay. Then thought its probably the tranny.

Ill be cruising, go to pass, it stutters.. like when I push the accelerator.. it feels like it doesnt pick up, when normally it would. I either have to let off or push harder for it to actually realize it needs to down shift.

I've noticed it on the freeway and turning onto streets from a green light
I slow down a bit to get around the turn, then hit the gas.. it hesitates.. and I usually just push it harder for it to get the point that it needs to downshift.

 

Gracias sir.

So, passenger side in the manifold collector behind o2 sensor at atleast 10*. Got it.

 

So used my Torque app to get a rough idea of my AFR...

Cruisin/idle I was between 14.63ish-14.75ish

WOT it was showing no less than 12.something.

And one point during WOT.. I think I was goin around 70... the throttle cut out. Like it was either starving or too much fuel..

I think im gonna undo the FPR mod and go run it again.