watchman

Do they work, and can they damage the engine or ecu

mdvaldosta

Both work, both potentially *could* damage your engine, but not unless your chip was tuned by a complete moron or you put a generic chip or resistor on motor with a power-adder. </P>


IAT resistor: simply put, the resistor is pushed into the plug for the IAT sensor, the IAT sensor will remain unplugged after. The IAT returns to the CPU certain resistances based on intake air temperature. The resistor sends a fixed resistance of, say 30* air, causing your cpu to read that as dense air and it will lean out the fuel mixture a little and increase ignition timing. That is where the increased power comes from. Now, those resistors selling on ebay, those are all generic and dumbasses are selling those people all the same resistor. Know that most every vehicle that uses an IAT sensor (sometimes they can be plugged into the coolant temp sensor too) have sensors that put out different ranges of resistance. For example, on one vehicle 30* air might be a resistance of 300 ohms, and on another 300 ohms might be out of range or be the equivalent of 150* air! Thats where they can do damage, make performance worse, or just do nothing but trip a check engine light.</P>


Chip: simply put, correctly modifies air / fuel ratios, ignition timing, corrects for tire and gear changes, firms / changes shifts in automatic transmissions, increases redlines, etc. You can buy generic, which is fine for a stock vehicle, you can buy custom chips burned for your mods, or have a custom dyno tuned chip for your setup. Those are in order of good to best. If you have a heavily modded car don't go buy a generic chip made for stock vehicles, it could cause problems.</P>


I hope this helps anyone else with the same question.</P>

watchman

Thanks
I bought one off of ebay, but now I don't think I'll us it.

Black Horse

My dads an electrician so he has a lot of electrical stuff laying around...I did some research to find out the resistance values for the mustang and by that I just used a 56k ohm. resistor and took out my ait filter and gained .2 of a sec. (did some runs with, some without) it works as long as you have the right resistance.</P>

n2o44

the pcm has short and long trim memory correction for what ever a/f it is trying to target . a piggy back chip is better becaust it directly changes the values in the program , fooling some sensor value may work for a lil but it will more than likely compensate for it over time.

watchman

I read some infomational sheets how about 4.7ohms 1/2 watt?

watchman

By the way I really glad I found this web thanks for all you advice.

crimson tide

4.7 ohms is hardly any resistance at all that would be basically jumpering two connections. if i were you i would stay away fromjerry rigging (without using any offensive terms lol)your EEC and pay for a dependable product that wont screw you later on. if your stang is stock go to shuck's, kragan, pep boys, etc. they have a couple tuner chip models for about 100.00 i had one before i bought my diablo. it actually worked pretty well </P>


and actually to add to what was said previously, electronic components will stray out of standards and require recalibration or replacement if you place a resistor that was not intended for use with the CPU it will compensate for the new resistance values over time and alter the efficiency of your EEC</P><edited><editID>crimson tide</editID><editDate>37904.0459375</editDate></edited>

watchman

Thanks,
You know your right. I am not going ro screw around with homemade stuff, I have put an air induction system on and it might be my imagination, but I can feel a slight difference in acceleration.

crimson tide

hey np just tryin to help out my fellow stangers <IMG src=smileys/smiley2.gif border="0"></P>


and also in response to your feeling an increase in your acceleration your not imagining anything colder air increases the amplitude of the spark created in the combustion chamber therefore increasing perf.</P><edited><editID>crimson tide</editID><editDate>37906.0742824074</editDate></edited>