manifold coolant temp sensor - CamaroZ28.Com Message Board


Reply
 
Thread Tools Search this Thread
Old 10-31-2010, 06:26 PM   #1
Registered User
Thread Starter
 
Join Date: Feb 2000
Location: Pilot Mountain, NC
Posts: 560
manifold coolant temp sensor

is it bad to run with it disconnected? i know it will throw i code but?
Wishmaster is offline   Reply With Quote
Old 10-31-2010, 09:46 PM   #2
Registered User
 
Join Date: May 2007
Location: Fort Atkinson, WI
Posts: 344
Re: manifold coolant temp sensor

Quote:
Originally Posted by Wishmaster View Post
is it bad to run with it disconnected? i know it will throw i code but?
Why would you want to? There must be a reason why you want to do this!
cars3 is offline   Reply With Quote
Old 10-31-2010, 09:50 PM   #3
Registered User
Thread Starter
 
Join Date: Feb 2000
Location: Pilot Mountain, NC
Posts: 560
Re: manifold coolant temp sensor

because im trying to pin point a problem that has been going on for to damn long...and i kinda wanna sell the car and would like to get it fixed.
Wishmaster is offline   Reply With Quote
Old 11-01-2010, 05:46 PM   #4
Registered User
 
Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: manifold coolant temp sensor

It's not too bad to run with the CTS or IAT disconnected but you will run likely richer than you need, thus fouling plugs and wasting a lot of fuel. It is acceptable just for testing but I wouldn't drive it like that to work every day.
You can test the CTS and IAT sensors with a simple ohm-meter if you need. They do go bad, just like any other sensors.

Hope this helps.
Lou
BigBadLou is offline   Reply With Quote
Old 11-02-2010, 12:46 AM   #5
Registered User
 
Join Date: May 2007
Location: Fort Atkinson, WI
Posts: 344
Re: manifold coolant temp sensor

Quote:
Originally Posted by BigBadLou View Post
It's not too bad to run with the CTS or IAT disconnected but you will run likely richer than you need, thus fouling plugs and wasting a lot of fuel. It is acceptable just for testing but I wouldn't drive it like that to work every day.
You can test the CTS and IAT sensors with a simple ohm-meter if you need. They do go bad, just like any other sensors.

Hope this helps.
Lou
I do not want to hijack this thread, but Lou how do you check the IAT. I think I may have a problem with it on my formula 350 from what people are telling me.
cars3 is offline   Reply With Quote
Old 11-02-2010, 09:23 AM   #6
Registered User
 
Join Date: Jun 2004
Location: Austin, TX
Posts: 151
Re: manifold coolant temp sensor

I assume you have a TPI intake? You can test it the same way as a CTS (since it's actually a CTS in there that's measuring the heatsoaked manifold instead - Chevy does not believe in measuring the real AIR temperature with its Intake Air Temp sensor ).

You can pull the sensor out and measure its resistance at several temperature points.
Use this chart for resistance reference: http://www.thirdgen.org/techboard/at...ase-ctsmat.gif

If you measure the sensor cold, let's say outside on a 50-degree day, you should see several kilo-ohms in resistance (around 5).
If you put the sensor in the freezer for half an hour, you should be able to measure around 25 kohm.
Put the sensor in a boiling pot and measure it at least at boiling point (around 180 ohm). You can also measure points in between, using a reference thermometer, it's up to you. Just like in the good old days of school lab work.

That will tell you whether the IAT/CTS is out of range. Sometimes they just stop reading at all.

Let us know what you find.
Lou
BigBadLou is offline   Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
coolant temp warmeck General 1967-2002 F-Body Tech 57 04-27-2015 04:34 PM
Do PCMs fail? AlaskaZ28 LT1 Based Engine Tech 9 01-01-2015 12:30 PM
New Member introduction/a bit of help AlaskaZ28 New Member Introduction 2 12-10-2014 02:39 PM
new temp sensor that is faulty??? AlaskaZ28 LT1 Based Engine Tech 1 12-10-2014 02:37 PM
Code 15.... 91Bird305 Midwest 6 08-08-2002 12:36 AM


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 -5. The time now is 08:08 PM.


Copyright © 1996-2017 CamaroZ28.com. All rights reserved.