See!...I told ya..

Good job Chevy!

 

Thanks Chevy - but where is the MAF located?

 

Here is a picture of mine..It is located on your Intake plenum between the filter and engine... I think it's mounted on top.

 

note to bogy......your may not look that clean

 

I took the entire intake system apart last weekend, and there is no temp sensor, just the air intake sensor. There might be a sensor integrated into the throttle body but I doubt it. By that time it probably doesn't matter.

 

The MAF sensor is removable as shown in Dennis's post. If you still have the stock intake it will be right next to the air box. The connector has five leads. Here is the wiring diagram. The tan and black wires on one end goto the IAT sensor. The other three are for the MAF.

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Thanks. We appreciate all of this detailed technical information you have for us. It's a great help. How did you get to learn so much about this stuff, or should we not ask and just enjoy the great advice

 

Here are two IAT timing adder tables. One from a Silverado SS and the other from a Colorado I5. On the Colorado table below 104 F no timing is added. On the Silverado SS table, below 86F no timing is added until 23F then timing is added. If the Colorado tune is like H3, then unless your IATs are above 104 then any IAT skewing will not be effective while you are moving. I did some testing and with the stock air box, the air temp can get this high (+104F) after sitting at a long red light while it is about 80 F outside. The IAT skewing for me removed the sluggeshness when pulling out.

[IMG]local://upfiles/774/5D1DCC0A57D5486CAD3432D2AEF43D81.jpg[/IMG]

[IMG]local://upfiles/774/4142A8BD8A694C0099AAFF7840553979.jpg[/IMG]

 

So what you are saying is adjustments aren't really made unless the air going into the engine is warmer then 104? Does the MAF sensor have a temp sensor built into it? Where is the temp sensor?

 

Yes....[sm=headbang.gif]

This is the MAF and intergated into this very same thing is the IAT sensor too.

5 wire connector

The gimmicks on Ebay are a fixed resistor to tell the PCM the intake air temp is cold...so as you see from the schematic (thanks to Chevy) the IAT is shown as a variable resistor on the tan and black wires..as it heats up the resistance goes down.