Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 07-02-2018, 06:25 PM   #1
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: WA
Posts: 6,087
Garage
How is exhaust temperature measured?

I was playing around with the Durametric today, reading some exhaust values, and was curious about how the car measures exhaust temperature. To my knowledge, the car doesn't have an exhaust temperature sensor...

Any insight?

particlewave is offline   Reply With Quote
Old 07-02-2018, 06:33 PM   #2
Registered User
 
steved0x's Avatar
 
Join Date: Dec 2012
Location: FL
Posts: 3,991
I wonder if it is from the O2 sensors, can they do it?
steved0x is offline   Reply With Quote
Old 07-03-2018, 08:09 PM   #3
Registered User
 
Join Date: Sep 2017
Location: MALIBU
Posts: 166
interesting.....there are no sensors in the system.
__________________
2003Boxster
1973 Carreras RS tribute
2000 Saab Aero wagon stick
1990 Chevrolet pu pre runner
boxfix is offline   Reply With Quote
Old 07-03-2018, 08:35 PM   #4
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 2,987
is it exhaust temp, or o2 sensor temp? o2 sensors have a heater in them in order to bring sensors to temp to work properly.
The Radium King is offline   Reply With Quote
Old 07-03-2018, 10:01 PM   #5
Custom User Title Here
 
particlewave's Avatar
 
Join Date: Mar 2012
Location: WA
Posts: 6,087
Garage
It's shown in the shop manuals and Durametric as exhaust temp. I monitored it, the o2 readings and o2 heater resistance. I assumed it would be a change in resistance at the heater (like a thermocouple), but the resistance held steady as the temperature rose.

However, testing a spare o2 sensor on the bench while I heated it to 600f degrees with a torch, the heater resistance did change from 3 ohms cold to about 20 ohms hot.
That must be it. I'm not sure why the Durametric shows resistance holding steady.
I guess I'll try heating the sensor on the bench with its own heater and measure the resistance.


Last edited by particlewave; 07-04-2018 at 12:05 AM.
particlewave is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 12:19 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page