TCwindom

already get that because of my damn intake

ramsee1

Guess nobody else wants to spin there wheels off the line then.
It makes sense in theory. The resistor is supposed to send a false temperature reading, altering the mixture to get more air. Anyone notice your cars got a bit more zip on a cooler day?

redzeppelin

Exactly, basically it will make your car run like it does when the engine is cold, when you first start it up in the morning. But, the ecu renders it useless as soon as the fuel loop closes effectively "tuning" it out. I, unfortunately was suckered into buying one of those "resistors in a box" a about six months ago, and when I found out it doesn't work I tried to return it and got no response from the seller. trust us, stay away from crap like that.

Pheonix

They don't do anything.
In actuallity - even if they did as intended (despite closed loop) they would slow the cars even worse.
They work by adding microscopic amounts of fuel, Toyota engines (as most modern engines) run insanely rich to create peak power. Making them richer simply cuts power even more.


ramsee1 if you're looking for something to tune with, buy a good piggyback.
(FYI the earlier VZ v6's can. )

Wassa786

from what i've learned, they're something you can get at the local electric store, just a small resistor. i plugged one into my es 300.....i mean i can feel it a little, seems like .1 secs faster =P
but yea, it might screw w/ your emissions, havn't had any problems yet though....but yea, don't fall for any ebay ploys....i'll put actual performance upgrades soon though =P
(once I get the bread)

Pheonix

What it will do, is give you no more than 2-3% more fuel for the first 30-45 seconds from when the car is cranked. At which point the ECU's go from open loop to closed loop.
OBD-II ('94 1mz-fe & up) will instantly, and continually tune the system with a combination of short & long term fuel trims. Of which - ltft will carry over into open-loop mode. So when you go step on the gas - noting.
OBD-I will trim the change in closed loop, but it will not carry into open loop.
Again 2 important points about that stuff:
1) They don't do anything
2) When they do - they do the wrong thing making you slower.
If you just want more fuel, you can buy a pot & trim the coolant temp sensor to run cold all the time. You can normally get an extra 2-4% fuel that way. AKA: 1.12 - 2.24bhp on a 1mz-fe & that's if it can use the fuel in the first place (Which they can't!)
At best, you can argue a few tens, at most a couple percent better tip-in throttle responce.



This really should be busted & left to real piggybacks.
SMT's, E-manage, FTC, safc ect.

ramsee1

Hey watch where you're pointing that sign mister!
All I wished to do was spark a bit of debate. I've seen a lot of people chime in and jump on the bandwagon when they don't have all the facts. For instance someone mentioned a resistor will tell your car it's not warmed up... the iat has nothing to do with that.
I understand about the open loop and all but why would the ecu ignore it afterwords? I was under the impression the resistor would tell the ecu to lean out the mixture, as I am aware how rich toyotas run.
Anyway! I am not taking sides and maybe it is pure crapola. I'd just like to see someone buy it, get on a dyno and then dismiss it.

redzeppelin

Umm, I think you meant that sign means your dumb or something. In fact, I DID agree with you, look at the smilie list where the "I'm with stupid" smilie is and it says agreed right next to it. Again, I wasn't calling you stupid, sorry for the miscommunication.

Pheonix

Ya, nobody's calling anyone anything, we're just discussing why they don't work, and what will.
It doesn't ignore it, in OBD-II any long term fuel changes are kept at all times.

Read this PDF to see how generic Toyota OBD-II fuel systems work.

ramsee1

I know I was saying that in good humor! I've been a boardmember on and off for about 4 years and I think everyone on here is pretty awesome. Thanks for the group hug
And thanks for the link

3000

Yep it's just a CHEAP resistor. My cousin fell for it and used it. It was CrAp. All the car did was kinda sucked in a little more air and that was it. Then he said he started smelling this weird stink. I laughed at him and said "There's no stupid cheap speed chip."

lexusls430

How about the other chips in a box?

DaveGS4

iTrader: (2)

Hmm, not sure which one will give you more power....



Probably more here


And if you play them right, these might give you the most.

plex

iTrader: (11)

the chicken and the chips look good making me hungry dave lol. your avatar scares me somehow, something is not right with that face

flipside909

I think this above because of the CARBS.