Installing A Chip On The Iats Sensor

hwy5guy · April 12, 2009

Hi I have installed this before on a 97 GMC which was easy. The avalanche requires a little more info. The IATS is combined with the mass air flow sensor and I have to remove the + & - wires that control the IATS from the wire harness. The colors for the +/- are unclear to me.

After finding the two wires I have to plug in the chip to apply the changes to the Mass air flow sensor.

.justin. · April 12, 2009

Please don't do this, as it will result in transient fuel (throttle change situation) conditions that actually use MORE fuel and will cause a blanket 4-6* in ignition timing increase. In hot weather, you WILL experience detonation.

The IAT sensor is there for a reason. To get the timing increase that yields more power and better mileage, while still maintaining the temperature compensation ability, a custom tune would be the way to go.

hwy5guy · April 13, 2009

Hi I have installed this before on a 97 GMC which was easy. The avalanche requires a little more info. The IATS is combined with the mass air flow sensor and I have to remove the + & - wires that control the IATS from the wire harness. The colors for the +/- are unclear to me.
After finding the two wires I have to plug in the chip to apply the changes to the Mass air flow sensor.

hwy5guy · April 13, 2009

Please don't do this, as it will result in transient fuel (throttle change situation) conditions that actually use MORE fuel and will cause a blanket 4-6* in ignition timing increase. In hot weather, you WILL experience detonation.
The IAT sensor is there for a reason. To get the timing increase that yields more power and better mileage, while still maintaining the temperature compensation ability, a custom tune would be the way to go.

Zembonez · April 13, 2009

Please don't do this, as it will result in transient fuel (throttle change situation) conditions that actually use MORE fuel and will cause a blanket 4-6* in ignition timing increase. In hot weather, you WILL experience detonation.
The IAT sensor is there for a reason. To get the timing increase that yields more power and better mileage, while still maintaining the temperature compensation ability, a custom tune would be the way to go.

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hwy5guy · April 13, 2009

Thanks for input will think about it, as I mentioned It worked OK on my 97 Tahoe and that was in Southern CA?

Skip

svensk · April 13, 2009

Thanks for input will think about it, as I mentioned It worked OK on my 97 Tahoe and that was in Southern CA?
Skip

You know that the 5.3L is a completely different animal from your '97? What justin is saying is you could possibly make much worse power/economy and even damage your engine.

nbscanuck · April 13, 2009

All that does is provide a false reading to the ECM.

bill190 · April 13, 2009

Basically a car is like a human body. We have "sensors" to tell us what is going on. What if someone was to "rewire" a finger sensor to tell our brain that it was feeling cold when it was actually feeling something hot?

I suppose the person might burn their finger!

Same thing with a car engine. The various sensors monitor what is going into the engine and what is coming out the exhaust.

Then with a car, these may operate in moderate conditions for their entire "lives", or may from time to time operate in extreme conditions. They may operate in extreme cold conditions. They may operate in extreme hot conditions. They may need to drive up a steep grade for many miles when it is extremely hot, or drive downhill for many miles when it is very cold.

They may operate at or below sea level where there is a lot of oxygen in the air, or high up on a mountain where the air is thin. (When humans are hiking high up on a mountain, we have a sensor which tells us we are not getting enough oxygen -> so slow down or breath faster!)

Anyway the car manufacturers have teams of engineers with all sorts of expensive test equipment to design vehicles to run the best in *all* conditions.

I think I prefer to leave things as they designed it. Then I won't worry about driving up that steep grade on a hot day.

hwy5guy · April 14, 2009

Thanks for input will think about it, as I mentioned It worked OK on my 97 Tahoe and that was in Southern CA?
Skip

You know that the 5.3L is a completely different animal from your '97? What justin is saying is you could possibly make much worse power/economy and even damage your engine.