Brown Sensor And Hot Starting - Forums
LinkBack Thread Tools Rate Thread Display Modes
post #1 of 6 (permalink) Old 23-08-2006, 19:27 Thread Starter
Registered User
Join Date: Jul 2005
Car: MGF
Posts: 79
Brown Sensor And Hot Starting

I have been having problems with hot starting, long fast run stop and won't restart for several minutes. I have been advised that replacing the brown engine coolant temp sensor will cure it but I don't follow why. Can anyone explain? Thanks.

yellowduke is offline  
Sponsored Links
post #2 of 6 (permalink) Old 23-08-2006, 19:39
Registered User
Join Date: Mar 2005
Location: Cheshire
Car: Honda S2000
Posts: 5,647
Have a look in the `tec`section of Dr Bells site........ all will be explained
Mark.L is offline  
post #3 of 6 (permalink) Old 24-08-2006, 17:37 Thread Starter
Registered User
Join Date: Jul 2005
Car: MGF
Posts: 79
Am I being thick? I have read through those tech articles a number of times and none refer to not starting up when hot. The car isn't overheating according to the oil or coolant gauges. So am I right then to assume that the brown sensor is buggered and telling the ECU that it shouldn't let the car start as it is has overheated? Both fans are working too by the way.

yellowduke is offline  
post #4 of 6 (permalink) Old 24-08-2006, 18:03
Registered User
Join Date: Feb 2004
Location: South East
Car: Other Manufacturer
Posts: 782
The temp sensor can give poor hot starting because it is informing the ECU that the engine is still cold, so will be effectively "flooding" the engine.

They normally fail the other way round causing poor cold starting because the ECU thinks the engine is hot so therefore doesn't increase injection time.
Respot is offline  
post #5 of 6 (permalink) Old 25-08-2006, 09:45 Thread Starter
Registered User
Join Date: Jul 2005
Car: MGF
Posts: 79
Ah now that makes a lot of sense as there is always a petrol smell once it gets going again. Thanks for that. I think it's always best to get an understanding of these things otherwise you are at the mercy of the mechanics!


yellowduke is offline  
post #6 of 6 (permalink) Old 29-08-2006, 05:20 Thread Starter
Registered User
Join Date: Jul 2005
Car: MGF
Posts: 79
Changed the sensor on sunday and went on a short shopping trip monday. Coolant got up to temperature quickly as usual and when I drove back i switched off and restarted a minute later with no problem. Real test will be stopping for petrol next motorway trip but first impressions are looking good!

yellowduke is offline  


Quick Reply

Register Now

In order to be able to post messages on the Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:

Similar Threads
Thread Thread Starter Forum Replies Last Post
T16 - Coolant Temperature Sensor - Brown Plug M220COUPE Coupe 1 22-05-2008 09:53
Coolant Sensor Brown or Black Bratby MG ZR / Rover 25, 200 & Streetwise 1 22-01-2008 16:42
Hot Starting KiwiBill MGF and MGTF (Sponsored by MGFnTFBITZ) 4 22-10-2007 09:52
mgf brown temperature sensor faulty / replace alistaire MGF and MGTF (Sponsored by MGFnTFBITZ) 1 16-02-2005 16:40
HGF/Coolant loss/Brown scum/car not starting? pneuromancer Others 0 30-01-2004 06:40

Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome