NAPA 6637 Mod Question
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Logistics Pro
Joined: Nov 2001
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From: Georgia
NAPA 6637 Mod Question
Installed the NAPA 6637 mod yesterday. Used some PVC and a new clamp and everything went well. However, I can't seem to find any conversation about the air intake temp sensor except to tie it off. Does it not serve a function? Should I try drilling a hole in the intake somewhere and mounting the sensor or will an open air reading from near the 6637 be accurate enough? What do some of you real mechanics think. Thanks for any response.
Post Fiend
Joined: Feb 2006
Posts: 11,892
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From: Middle Tennessee
You know, I recall thinking the same thing quite some time ago and even saw a writeup on a diesel site where it was mentioned that a malfunctioning IAT on a cummins was suspected as responsible for poor fuel economy as the computer was trying to manage fuel injection tables based on parameters, one being the IAT.
Having said that, mine is/has been zip tied and seems OK. I have had a lot better fuel economy than I have had lately though and cannot say if the IAT is used in our trucks for any fuel management. My manual has not led me there but even the DVD does not cover everything the PCM does and how it goes about it. So mine remains ziptied.
Having said that, mine is/has been zip tied and seems OK. I have had a lot better fuel economy than I have had lately though and cannot say if the IAT is used in our trucks for any fuel management. My manual has not led me there but even the DVD does not cover everything the PCM does and how it goes about it. So mine remains ziptied.
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jpcjguy
1999 - 2003 7.3L Power Stroke Diesel
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May 12, 2010 09:24 PM
