IAT resistor?
Registered User
Joined: May 2006
Posts: 559
From: Pothole, Ohio
Re: IAT resistor?
Originally Posted by Injuneer
Did anyone who responded notice the person who asked the question has a speed-density 1993. That's the last setup you want to put a resistor in. The ECM needs the exact inlet air temperature to calculate the density of the air, so it can calculate the mass flow of the air, so it can calculate the fuel flow. Setting the IAT at a fixed temperature will really screw things up.
Its not the same as the 94+ MAF cars, where the IAT is used for little more than a possible 3* timing offset for very high inlet air temps.
Its not the same as the 94+ MAF cars, where the IAT is used for little more than a possible 3* timing offset for very high inlet air temps.
Registered User
Joined: Jun 2004
Posts: 953
From: S. Ontario, Canada
Re: IAT resistor?
Originally Posted by Injuneer
Did anyone who responded notice the person who asked the question has a speed-density 1993.
No I did not notice that!
I think my statement that it should not be done on any car makes sense. But you're absolutely right that there is no way you should modify the IAT on a speed-density car. Some people have relocated the IAT closer to the filter to avoid heat soak and give the PCM a more accurate reading of ambient temp, and I think that's OK.
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PatriotTA
LT1 Based Engine Tech
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Feb 24, 2003 07:40 PM
