I have heard many times about putting a resistor in the connection to the air temp sensor instead of actually connecting it to the air temp sensor but apparently my brother didnt. He just wasted like $10 on ebay for a resistor for his 2000 grand am gt. I figrued while im thinking of it i might as well do the same to my camaro. What amount of resistance would give a 2.8(3.4) camaro optimum performance from the air temp sensor. In other words, what resistance does the sensor have when it senses cold air?

 

This kind of modification is honestly quite pointless in a closed-loop condition, since your O2 sensor is the governing factor in your mixture control. Generally this is only done in an attempt to compensate for a lean condition after multiple modifications to your motor... if your BLMs aren't reading lean, there's just no point. It's alot like stickerpower if you don't know what you're doing.. sure, it may look like a performance mod, but why is that minivan still beating you?

 

Yes, i know all that. And yes, my car is running lean, but no one answered my question?!?!?!?!? As for the mini van thing, i actually never had to worry about that, i dunno about u

 

I did it to my car i cant remeber what restiance i put in tho but it was susposto make the car think it was 27 degrees outside. Any ways i noticed no difference with it in what so ever only thing i did learn is becasue i did that i burnt out my CAT. When i hooked the stock sensor up i still noticed no difference between the resistor and the Temp sensor

 

The reason the CAT went bad, for those wondering, is because in open loop the motor thought that cooler, denser air was going into the motor, so the computer added more fuel to compensate. The exra fuel was expelled unburnt and toasted the cat, they really don't like raw gas.

 

Exactly why i went back to the IAT that came from the factory. The cat was only 2 years old too. Dont mess with it you ewnt notice a difference and it will cause more problems.

 

Why not just kill the cat??? with the resistor you arnt gonna pass an echeck anyways. you will clog your cat if you do mods like this and leave it installed. I really hate them things.


http://www.schematica.com/

has a nice freeware resistor program. 300k. let you play withthe colors and the different types. neat thing program that is handy. nice know what you want instead of doin the double check while at radioshack.

Matt

 

Tahnks Gumby, thats all i wanted when i asked the question although, from popular opinion, i dont think ill be trying this mod.

 

Plus you gotta think: Why are people trying to fool the computer? Hell, it knows best... seriously. Rigging up a resistor to fool the computer isn't going to help anyone out! Instead, make sure that the MAT sensor isn't getting warm from the engine; it should be as close to the incoming air stream as possible. Hell if you want to, extend the wires, and hang the MAT sensor in front of your air filter. That'd be the best reading.

(It's called a Manifold Air Temp sensor because some v8's actually had the MAT sensor mounted in the aluminum intake, and these sensors were prone to false readings due to absorbed heat.)