Has anyone ever purchased or maybe has laying around one of those devices that claim to be fuel saving performance chips that are usually sold for under $20 on ebay? They are just packaged up resistors designed to be plugged inline with your IAT sensor.

I would like for someone to take an ohm meter to one and tell me what the resistance is on it.

I would like that information since I plan on creating a DIY for our cars on how to build your inline adjustable modchip so you can control what the computer thinks the outside air temp is, thus allowing you to modify the fuel injector pulse width to whatever works the best with your engine setup.

 

LMAO...there are no performance chips for our cars

 

^ w-w-WHAT? Of course there are! Haltech makes one, MegaSquirt makes one, there are loads of them. Of course, they don't badge them as 'chips' they badge them 'standalone replacement' or 'piggyback' engine management computers and a lot of wiring is involved but . . .

No. There are no drop-in 'performance chips' for our cars. Save your money.

 

Your plan sucks.

You add a resistor to the IAT, what do you think happens? Computer reduces fuel trims to make up for the resistor because at idle and part-throttle the AFR is ALWAYS moving around 14.7 (as per closed-loop feedback from O2 sensor). Unless it's something that changes sensor outputs only when the engine is under high load (and ECU runs in open-loop), nothing except screwing with the O2 sensor would change fueling on a stock ECU (which is why your car runs exactly the same if the injectors don't flow the same when they're old, or when slightly different types of gas are used, etc. etc.).

 

<div class='quotetop'>QUOTE (Stocker @ Feb 2 2010, 08:23 AM) <{POST_SNAPBACK}></div><div class='quotemain'>^ w-w-WHAT? Of course there are! Haltech makes one, MegaSquirt makes one, there are loads of them. Of course, they don't badge them as 'chips' they badge them 'standalone replacement' or 'piggyback' engine management computers and a lot of wiring is involved but . . .

No. There are no drop-in 'performance chips' for our cars. Save your money.</div>

those are not chips...LMAO...Haltech makes a standalone engine management computer...

piggyback computers...no chip...

LMAO...all these systems utilize chips inside of them to make the system

here a chip for a bimmer...

http://store.bimmerworld.com/shared/StoreF...et=products.asp

for a VW

http://eurosportacc.com/chip.htm

Haltech engine management computer

http://www.haltech.com/index.php?option=co...8&Itemid=15

lmao.gif lmao.gif lmao.gif

 

You are all wrong.

Someone DOES make a chip for our car, but you have to send in your ECU to get it put in.

One or two guys on Hyundaiaftermarket.org had it done back in the .com days, but i can't remember who made them. Visionz should know. Superchips maybe? Anyways, company was in Australia if memory serves.

As for this thread, you should search before posting, this site is almost 7 years old, just might be a chance that the thousands of members here may have just once mentioned this before.

LOL

https://www.hyundaiaftermarket.org/forum/lo....php?t3859.html

For example.

There are many more threads.

http://www.powerchipgroup.com/interact/dat...asp?pid=Hyu0035

Yup, they still have it.

 

Krazy - to sum up all the posts here, PLEASE DO NOT buy an eBay performance chip for any car.

 

^ nor try to come up with your own haha

 

mwood please see this page

 

Ok, it appears that I should have explained things a little better.

I am not looking to buy or copy one of those e-bay chips. I have already researched this concept and been testing it for about a 1/2 year now on a few ODBII cars.

Basically what I am doing here is modifying what the IAT sensor is reporting back to the ECU. Having the ability to control what that sensor is reporting back to the ECU allows me to directly alter how much fuel the stock ECU uses in its final calculations before firing the injectors. When the IAT sensor reports colder than ambient air temperatures (Stock Sensor), the ECU increases the fuel injector pulse width thus increasing the amount of fuel to the engine. If you reverse the temp and report a warmer air temperature back to the ECU, you are then decreasing injector pulse width or leaning it out.

So cold temps increase fuel supply and warmer temps decrease fuel supply. This is just the IAT sensor, if you modify the Engine Coolent Temp sensor values for our cars it will also have an effect on fuel injector pulse width but it is also used in the ignition timing tables. The ECT sensor is next on my list of sensors I plan on testing especially since it appears to affect the timing.

Also I would like to say that I am not blindly adjusting these sensors. I use an ODBII scanner that shows me what each of those sensors is actually reporting back to the ECU. I then monitor the O2 sensors to get an idea of how rich or how lean my adjustments just made the engine run and if there is any performance benefit to it running that way.

If people are interested in this then I can create a DIY post on how to build the current one I use on my tiburon and what wires you need to in tap into for it to function properly. The only drawback is that I highly recommend an ODBII scanner so you see what your current settings are really at instead of relying on a volt meter.

And what I had meant with the e-bay question was that even though I would never buy one of those devices, I was hoping someone else might have and could have gotten me the resistance value off it so I could test that out with my adjustable resistor.

The performance gains I am getting from parts that cost less than $10 was worth all my time and effort I had put into this project.