I bought a mod chip of ebay. It is not actually a chip but a small resistor looking thing that goes into the ATI plug. I had read a little about it on another post but I wanted to see if anyone else had any more input on the subject. Is it worth the trouble or will it adversly affect the truck?

 

That mod has been floating around the mustang community for quite a few years. The problem is that the ECM adapts to the lower resistance value after a few drive cycles. Do you want to keep disconnecting your battery to clear the ECM every time it adapts to the resistor????

The funny thing, you can go to Radio Shack and make this "mod" yourself for less than 5 bucks..

 

I only paid 6.99 plus 1.50 for this one so maybe I'm out about 8 bucks. I don't know if it is worth the trouble though.

 

What is the ATI, and how does this mod work?

 

I can tell you what it is but I couldn't tell you exactly how it works. it is a small piece like one of those out of the inside of the old transistor radios. It looks like a piece of wire 3 inches long with a small almost rice grain size deal in the middle. You disconnect your battery and then disconnect the ATI plug ( it was on the driver side ontop of the intake on my 5.8). The plug has two holes in it where all you do is bend the wired ends of the modifier and insert them into the two holes, securing it with electrical tape. It is supposed to give you up to 20 more horses by tricking the computer into thinking the air temperature is always cold, I believe, which is supposed to force the engine to operate at a higher horse power output. As I said, I am not entirely sure if I explained it correctly but maybe someone on the board with a little more insight can clear it up a little better. There was another post that also discussed this topic so you might research and get more info there. If you want to dind it on ebay look up "power chip" or "power mod". I am still not sure if I am going to run it for very long because I don't want to harm the engine.

 

pretty much it makes it run lean i think

 

^ It makes it run rich because it makes the computer think that it is cold outside. The truck will run better with the air temperature sensor working properly, just as it was designed to do.

 

ehh i knew it was one of the two, but it was late and couldn't think.

 

Haha dont mean to pull this back after a couple weeks, but would any of you happen to know the resistance of the resistor. Sure i can find one layin around the room, figure its worth a try

 

You all know you can do the same job by putting the IAT sensor further away fvrom the engine like in the tube before the airbox right?

 

Well, it doesn't really do the same thing. The resistor tells the computer is is cold outside - and that the temperature never changes. Moving the location of the sensor gives a more accurate air temperature reading that isn't affected as much by engine temperature.

 

Well, good point I guess, but having it near the inlet to the airbox (kinda down by the rad support) will help with that because it will say its cooler. Definitly better than having it near or in the intake.

 

Yes I agree with you - I moved my air temp sensor to right next to the air filter when I did my MAF swap.

 

thanks, found somthing to keep me busy after class haha