overheating, fuel cutout issues?

[Tamago]

Originally Posted by mojoyaris

Been away for awhile.
The car runs between 4500 rpm and 6700 rpm constantly at the track.
With the stock thermostat it over heats after a 15 minute hard run on the track and since the car runs lean, it seems to not get enough fuel.

I installed the TRD thermostat and better radiator cap for pressure and although it doesn't overheat, it will cut out when running the car hard, turning the car hard etc.
Basically if I run it 8/10's to 9/10 speed this way it will cut off the fuel or there is fuel starvation.
When I let off the throttle and drive it slowly, it will go back to normal and I can run again, but not for long. I basically have to give it a cool down lap before running hard, but this can be a problem when I'm timing a lap or something.

On day to day driving there is no problem. Only when driving at a Solo 1, time attack or track day. Especially on smaller tighter courses where I'm doing hard 2 to 3rd gear shifts.


I've got a few months to figure this out before I decide to enter the car in the Targa or not.

I'm thinking about getting bigger fuel pump. redo the air fuel management mapping
and bigger/better injectors.

you don't need any of that stuff.

buy a MAF translator and just tweak the MAF signal to trick the ECU into giving you a few percents more fuel at your target RPM.

http://www.horsepowerfreaks.com/part...rs/Gen_2/15418

[Biggie™]

Originally Posted by Tamago

buy a MAF translator and just tweak the MAF signal to trick the ECU into giving you a few percents more fuel at your target RPM.

Too bad the Yaris ECU will learn around that in about 5 minutes and render it useless...

[Tamago]

Originally Posted by Biggie™

Too bad the Yaris ECU will learn around that in about 5 minutes and render it useless...

.. not if you know what you're doing ;)

[Biggie™]

Originally Posted by Tamago

.. not if you know what you're doing ;)

Um, no... More to the point that fuel is obviously not his problem, but whatever.

[Tamago]

Originally Posted by Biggie™

Um, no... More to the point that fuel is obviously not his problem, but whatever.

he asked how to add fuel, i told him. i never said THAT's why it's overheating..