operating temp - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 09-06-2004, 12:42 AM   #11
Senior Member
True Car Nut
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Thanks: 0
Thanked 0 Times in 0 Posts
markwb is on a distinguished road
Default

Quote:
Originally Posted by opensourceguy
That would mean i'd have to take out the sensor right? If I can get one for >$10, I may as well go for it, not like it'd be the first thing on the car to break.


-justin
Or leave the sensor installed, check resistance directly at sensor with connector removed. With engine stone cold (equal to ambient outside temp) check resistance of ect and compare to service manual. For example suppose ambient temp is 80 degrees, resistance should be 140 ohms, and you read 139.3 ohms, then the ect is good. Those values I call out are just arbitrary, you'll have to refer to service manuals for exact figures. You could also warm engine up to operating temp (assuming it is close to 200 degrees) then check resistance also as a comparative reading.
markwb is offline   Reply With Quote
Old 09-06-2004, 01:13 AM   #12
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

okay, should I jump the wires at the temp gauge on the cluster, or go to the temp sensor on the block?


-justin
opensourceguy is offline   Reply With Quote
Old 09-06-2004, 07:02 AM   #13
Senior Member
True Car Nut
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Thanks: 0
Thanked 0 Times in 0 Posts
markwb is on a distinguished road
Default

Go directly to the ect sensor on the block, disconnect the the connector from ect, then place ohmmeter across the sensor to read resistance.
markwb is offline   Reply With Quote
Old 09-06-2004, 09:18 AM   #14
Senior Member
True Car Nut
Thread Starter
 
Join Date: Apr 2004
Location: Three Oaks, Michigan
Posts: 4,879
Thanks: 0
Thanked 0 Times in 0 Posts
opensourceguy is on a distinguished road
Default

okay, hopefully she'll be a running next weekend, and i'll be able to test it!

thanks guys
-justin
opensourceguy is offline   Reply With Quote
Old 09-06-2004, 12:25 PM   #15
Junior Member
Posts like a Ricer Type-R
 
Join Date: Aug 2002
Posts: 10
Thanks: 0
Thanked 0 Times in 0 Posts
willwren is on a distinguished road
Default

I'd have to look to be sure, but I think my ECT is a single wire. Read that wire to ground.
willwren is offline   Reply With Quote
Old 09-07-2004, 06:47 AM   #16
Senior Member
True Car Nut
 
Join Date: Oct 2002
Location: Groton, CT _NEBF 05, 06, 07_
Posts: 2,703
Thanks: 0
Thanked 0 Times in 0 Posts
markwb is on a distinguished road
Default

When you remove the connector from the ect you should be looking at 2 pins there, place ohmeter across pins A & B on ect. Resistance is inversely proportional to temperature. Here'* a few temp/resistance specs out of 2001 service manual.
212 degrees=177 ohms
194 degrees=241 ohms
86=2238
77=2796
68=3520
The ECT inputs to the PCM which in turn communicates data to the IP. Hope some of this info is useful.
markwb is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
dtc 18 @ operating temp only yer jealous 1992-1999 16 03-02-2006 01:45 PM
Rough Idle At Operating Temp? LakevilleSSEi 1992-1999 11 09-15-2004 03:32 PM
What is the normal Trans operating temp??? 1993 SLE Performance, Brainstorming & Tuning 14 08-14-2004 09:57 AM
Normal operating temp 1993bonnie 1992-1999 24 05-04-2004 08:27 PM
What is normal operating temp on 96 K? SSEBONNE4EVA 1992-1999 8 03-16-2004 01:06 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:40 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.