165 $6E cold idle

[rrauscher at nni.com]

The azty hac is on the gmecm site. I think it is under the
730 ecm section. Named azty_hsc.dsm

BobR.

>
>> 
>> I can understand your confusion with the mat temperature. I haven't
>> quite figured it all out yet either. I do know that when the sensor is
>> in the air cleaner it is an IAT (intake air temp), as opposed to mat.
>> The code that I have seen handles it differently.
>> 
>> Apparently the mat picks up heat from the surrounding manifold. How
>> much is from radiated or transferred through the sensor body is a
>> good question. 
>	Maybe my test will tell the answer to that (see other reply to Bruce),
>> I know that as the air moves through the manifold it
>> picks up heat. Slow air more, faster air less.
>	thought about that but not about the air picking up temp as the speed
>increases.  the FireBird induction i have is all flexible tubing so there
>are lots
>of large bumps to hit to generator heat.  
>> Then the faster air starts
>> heating up due to friction. Maybe the sensor is located in a 'dead'
>> area, not much air flow past it. On TPI's I think it is mounted in the
>> back of the manifold.
>	The super ram is the same way, back of the plenum through the bottom of
>the 
>plenum, though CL of the box ST the air coming in the TB goes straight back

>to hit it.
> 
>> Additional heating is done by the throttle body coolant passage
>	not connected
>> along with the EGR.
>	installed, though I think disabled, I have to check that.
>
>> To see how an IAT is handled check the azty hac of mask $88. 
>	this in incoming?
>
>> This engine uses a sensor mounted in the aircleaner housing. The canister

>> type as the Firebird you have.
>> 
>> Here is the math I did for temp change vs AFR change (well only the
>> answers):
>> 
>> Going from 14.7:1 afr at 102F to 0F makes the afr 17.9:1
>> 
>> Going from 14.7:1 afr at 0F to 102F makes the afr 12.0:1
>> 
>> So, the change is significant.
>	great mental picture.  this leads me to think that @ WO it must make 
>a difference.  I am on a mission now.  stand back, real data to follow.
>
>	Thanks to all
>
>> I've added an IAT sensor & support code to the ecm I'm currently
>> using. It will be interesting to see how it works out. I suspect that BLM

>> changes will be less.
>> 
>> BobR.
>> 
>> p.s. on the $8D mask, '730, the egr is enabled by the mat temp.
>> 
>
>
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