DeaZaL

I heard that this could be adjusted.. If so HOW? and.. if I did.. would I need to reprogram the ecu?? I heard someone from avalon racing talking about this one time..

IceY2K1

iTrader: (3)

No ECU reprogramming will be necessary, but the Throttle Position Sensor might need adjustment. Tell me how if you figure it out. I plan on checking next time I remove the intake track.

DeaZaL

will do borthaaa

UMD_MaxSE

iTrader: (1)

I remember that post.... Paul from Avalon said something like the TB only opens up 90% or 95% of the way at WOT and they have a way of opening it fully...

IceY2K1

iTrader: (3)

You adjust the stop screw or whatever it is that prevents the "butter-fly" from opening too far. I haven't been that close to see what's up with ours.

got rice?

iTrader: (2)

if the TPS measures 4.0, it's at WOT. The throttle plate itself will not be completely horizontal.

DeaZaL

explain rice boy

UMD_MaxSE

iTrader: (1)

I think 4 is referring to the voltage drop across the TPS and ground.... right? I'll try and look it up...

Avalon Racing

E-mail my race tech @ Jeff@avalonracing.net. He can give you thge details. We have made the throttle body adjustments on Z's on the dyno and have achieved just under 10 RWHP. They key is to get the plate to open at 100%

Regards

Max_Vader_2K

I am very very interested in this!!!

got rice?

iTrader: (2)

at idle the TPS voltage is around .45 volts. at WOT, it's around 4.0 volts. If you adjust the throttle plate to be more horizontal at WOT, it won't be at the proper position when you're off the throttle. The throttle plate will be more towards the open position if this adjustment is made.

nvmymax2

iTrader: (1)

I had to adjust the TPS on my max because the ZEX kit calls for 4.0 Volts at WOT and the max only gives you 3.8 or 3.9. I don't know the truth behind whether or not this allows the throttle to actually open more, but it does allow the ZEX to work properly.

DeaZaL

Have you done it to any 5th gen's avalon guy?

Avalon Racing

Every Limited Edition we do for Nissan has the adjustment done. Also every Maxima that comes in for an upgrade to do.

Regards

Max_Vader_2K

do you adjust the throttle thing to open all the way at WOT

UMD_MaxSE

iTrader: (1)

but it sounds like sticky thread material

nvmymax2

iTrader: (1)

The way I did mine was to look on the firewall side of the throttle body and you will see a large sensor that is actually 2 sensors. First you have to find the "hot" wire in these sensors with a volt meter. It will be the one with 3.9ish Volts at full throttle, and about .4 or .5 at idle. Then you look on the sides of this sensor and you should see 2 screws. Very slowly loosen these screws, it doesn't take much force or rotation of the screws to make the TPS loose! Once this is done you can rotate the whole sensor clockwise and counterclockwise. Well all you do now is rotate it while looking at the volt meter and when you see the volt meter move from .5 at idle to about .7 or .8, you are done. This has successfully adjusted the TPS to be wide open and to test your work, check the voltage at full throttle and it should be around 4 or 4.2 volts. Once you are certain that you are finished just tighten the 2 screws back and go test drive. I am not sure how much of a difference you will notice, because when I did mine I was more interested in playing with the nitrous than I was worrying about this extra little power. Good luck and be careful.

Also I just wanted to let you know that if your local dealership finds out it will probably void some warranty.

Max_Vader_2K

How do you like the Zex kit anyway, I almost order it but I heard it sucked but if you say other wise I will still get it. and how was the install.

melanthius

Could someone explain this to uneducated folk like me? Much appreciated.

Avalon Racing

We are going to do a technical write up and do a few digital shots on this process. Jeff our race tech and fabricator is working on it now.

Regards

UMD_MaxSE

iTrader: (1)

thanks.... sounds like a neat thing to try out

theMax

Is the write up from avalon complete?

IceY2K1

iTrader: (3)

It's the Throttle Plate/Butterfly that needs to be "opened up". However, the TPS will most likely need to be adjusted once you mess with the throttle plate.

Someone needs to call Paul or email his tech for some details/pics.

UMD_MaxSE

iTrader: (1)

wow... who brought this thread up again?

Y2KevSE

iTrader: (13)

theMax

Y2KevSE

iTrader: (13)

j/k Hehehehe

Guess we never heard back from him.

psing23

seems interesting... any new info yet?

SC2K1

iTrader: (5)

Avalon Racing,

Will you be posting the write up on your webpage or on this forum? Please let us know. Thanks.

WANNARUN

Some of you guys are a little confused
Adjusting the TPS sensor alone will NOT give you any performance gains.
Adjusting the butterfly in the throttle body (so that it is straight with the airflow path) will give you performance gains.
Once you adjust the butterfly you will need to readjust the TPS.

I adjusted the Butterfly on my 01 AE only a little as it almost opened all the way from the factory.
I adjusted a friends Butterfly a whole helluva lot and he noticed a considerable gain (his was adjusted very poorly from the factory)

Also high mileage vehicles will see higher gains because over time the throttle cable stretches making the butterfly not open enough.

SC2K1

iTrader: (5)

WANNARUN, Thanks for the clarification. Can you let me know how both of these are done? Thanks.

Max_Vader_2K

How do you adjust the throttle butterfly?????

UMD_MaxSE

iTrader: (1)

It's probably in the Factory Service Manual somewhere..... I can check

DeaZaL

Where is the write up from the tech with nice pictures?!?!?

theMax

still waiting....