[Sapper SLT]

kinda confused as to which it will work doesnt look like a chip more like a resistor but it wants me to unplug my battery to install!!!! will i have to reset something or will anything happen bye unpluging my battery? pls help)

 

[dgroth]

Everytime I have unplugged that battery I had to reset everything. It is kind of a pain, but if you do the install correct it will only be one time you have to do it.

Good luck and let us know how it goes

 

[NitroTech]

Disconnecting the battery clear the memory of the PCM. Basically fuel and ignition map tables, and transmission adaptive memory. The function of the resistor is quite simple, the resistor effectively increases the voltage reading causing a false input to the PCM. The increased voltage interpreted as colder temperature and richens out fuel and advances spark.:smileup:

 

[Sapper SLT]

thank u much !!!!both of u man i love this forum

 

[BLUBYU]

Question for Nitrotech, will this throw a code or do any harm to the engine? Is leaning it out a bad thing?

 

[NitroTech]

For all intense purposes the affect if the resistor on the IAT sensor isn't so significant to the fuel/ignition map that it would make the mixture too lean to damage the engine. As for turning of the Check Engine, honestly, I can only say that the PCM does monitor the ECT (engine coolant temp sensor) and IAT on startup and looks for a temp correlation. If the difference is out of the specified range it can set a DTC.:smileup:

 

[Sapper SLT]

ok i installed the resistor!!! and i feel the difference i was clock 0-60 in 9.8 seconds as opose to the original 13 seconds it was a level 12 peice works great!!!! only problem is now the auto up down on the window does not work it goes down auto but not up is there a way to fix that????)

 

[KenCary]

Disconnecting the battery clear the memory of the PCM. Basically fuel and ignition map tables, and transmission adaptive memory. The function of the resistor is quite simple, the resistor effectively increases the voltage reading causing a false input to the PCM. The increased voltage interpreted as higher temperature leans out fuel and advances spark.:smileup:

Nitrotech, wouldn't the ECM retard the spark when it senses more heat to avoid Knocking?

I have been thinking about putting a resistor in line with the IAT in my Saturn to push more advance, but I was thinking that I need to fool the engine into thinking the air is cooler not hotter?

 

[Hoss]

hold the window button up all the way, after it is completely closed listen for one or two clicks in the door then release the button and that should reset it.

 

[SeattleJoe]

hold the window button up all the way, after it is completely closed listen for one or two clicks in the door then release the button and that should reset it.

Arrrrrr.......... my window only has auto DOWN! (Don't have the auto up option on my SXT.)

 

[SeattleJoe]

Disconnecting the battery clear the memory of the PCM. Basically fuel and ignition map tables, and transmission adaptive memory.

Does this mean, you have to "teach" it how you like to drive again? Might be a good thing, if I only knew what to do to get the computer to realize I want it to shift LATER, not sooner!

:i_rolleyes:

 

[NitroTech]

Does this mean, you have to "teach" it how you like to drive again? Might be a good thing, if I only knew what to do to get the computer to realize I want it to shift LATER, not sooner!

:i_rolleyes:

Drive it like you stole it!! It will push shift points to their limit (higher rpm). :smileup:

 

[fcsallan]

Good Call NT.

Seattle Joe, I think we have gone back and forth in other places about your shift points and it never occurred to me that the trans is "smart". It learns shift points by how you drive it. If you are constantly pounding the throttle and forcing the trans to shift both harder and at a higher RPM it will assume you always want it to work this way. It does take a bit of time for it to "learn" but I think that may be the ticket to your lockup issues.

Of all things, It is hard to believe that the answer is "beat on it".

 

[NitroTech]

Nitrotech, wouldn't the ECM retard the spark when it senses more heat to avoid Knocking?

I have been thinking about putting a resistor in line with the IAT in my Saturn to push more advance, but I was thinking that I need to fool the engine into thinking the air is cooler not hotter?

Hey Ken

Here's the scoop. To me these engines all run rich. Why? Because of inconsistent fuel quality across the country, also condition of spark plugs, air filter, and dirty throttle bodies. This I'm sure you're well aware of.

If combustion temperatures are too high of course the knock sensors detect it and retard spark. But the question that would need to be answered is what are the exhaust gas temps with/without the IAT resistor mod. In all reality the EPA finds it more acceptable for raw fuel to be dumped out the exhaust then having high levels of NOx. The IAT only plays a small part in the injector pulsewidth formula and the affect of the resistor would change it so insignificantly that a large increase in combustion/exhaust temperature wouldn't result.

Fuel delivery generally follows the cold temp equals more fuel and hot temps equals less fuel.

I really don't understand why so many believe more fuel equals more power. To me this is so far from reality. Unless you are drag racing and stomp on the gas then of course you'll need more fuel. But if you want fuel efficiency and max power then most engines should run leaner. Its a proven fact what combustion temperature is most efficient. Delivering more fuel then the combustion pressure/cycle can support is throwing raw fuel out the exhaust. Same goes for higher octane rating burning longer. Having incomplete combustion only lowers combustion temperatures and efficiency.

Thoughts??

 

[petey]

But if you want fuel efficiency and max power then most engines should run leaner. quote]

Great thread. So what is the best way to lean out the engine in your professional opinion NitorTech? The chip? Or do you have some voodoo magic under your hood???

 

[SeattleJoe]

Drive it like you stole it!! It will push shift points to their limit (higher rpm). :smileup:

Ahhhhhhhhhhh!!!!!!!!!!! Now I know!!! :SHOCKED: Thanks VERY much for that tidbit!

(I'd give you a big fat rep point ... as I can only give 1 at a time at present ... but don't look like you're really "needing" them! Besides, the system won't allow me to give you any more bonuses at present )

So, looks like I need to unhook the battery to get the system to reset and move back to "learn" mode???

 

[zmass]

And if you have said it i missed it while looking...

IAT=?????????????

 

[SeattleJoe]

So, looks like I need to unhook the battery to get the system to reset and move back to "learn" mode???

Hmmmmmmmm................... maybe this is a good excuse to spring for the Jet Chip ... as that requires detaching the battery cable during installation.

:smileup:

 

[NitroTech]

And if you have said it i missed it while looking...

IAT=?????????????

Intake Air Temperature Sensor

Go take a look at my post on "Know Your Nitro" Part 2. I've posted a pic showing its location. :smileup:

 

[Sapper SLT]

So i geuss starting the thread helped alot of ppl??!! i figured i wasnt the only one wondering oh and with this MOD in my ESP is delayed so i can skid out alil longer b4 it kicks in!!!! its nice to press the pedal alil and get trown into ur seat lol it added alot of power!!!)