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        General >> Problems >> 2.3 Temperature Gauge
        
(Message started by: mondeoman on Jul 16^th, 2010, 3:31pm)

Title: 2.3 Temperature Gauge
Post by mondeoman on Jul 16^th, 2010, 3:31pm

After talking to some of you at the Harewood House event I conducted some investigations into the dodgy temp gauge on my wife's 2.3 Ultima Facelift car.

The gauge quite often reads cold when the engine is warms, then it may shoot up near the middle and next minute slowly drop to cold again etc. Well I conducted a dash diagnostics and reboot etc and it appears that the signals it receives are correct for the display.

What I mean by that is if the car is warm, but the gauge reads cold the signal received is 255 which is correct for cold. I've caught it when the gauge is warm and the figure is around 129 ish which is right! (En9 t) This makes me suspect their is not a fault with the dash correct?

If that is the case can this sort of fault be caused by the thermostat, or do they either work/not work at all?

Could the wiring be changing resistance that would cause this, but their doesn't seem to be a pattern as to when it happens etc?

Any thought ideas as I'd like to get to the bottom of this?

Cheers,

Simon

Title: Re: 2.3 Temperature Gauge
Post by hlippo on Jul 16^th, 2010, 4:00pm

Had the same problem, re-soldering the instrument cluster fixed it.

Title: Re: 2.3 Temperature Gauge
Post by mondeoman on Jul 16^th, 2010, 4:22pm

Did you check the readings for the display that you were getting?

What exactly did you solder?

Title: Re: 2.3 Temperature Gauge
Post by hlippo on Jul 16^th, 2010, 4:28pm

I had the problem with the gauge and airbag light coming on and off, I have re-soldered every bit of the instrument cluster in the back. Takes some time but fixes most problems with blinking lights of any sort ;)

Title: Re: 2.3 Temperature Gauge
Post by Matt on Jul 16^th, 2010, 4:45pm

before going to the trouble of stripping the dash out and all that, have you tried a known good or new temp sender, its an all in one unit that just screws into the manifold or somewhere in the cooling system...

its item number one on the pic on the first page http://www.fordscorpio.co.uk/manual/engines/dohc2_3/2300CylHdRnew.pdf

Title: Re: 2.3 Temperature Gauge
Post by pedropedro on Jul 16^th, 2010, 4:49pm

it sounds like it is the temp sender to me..thats what i had same symptoms..reads fine for 5 mins then nose dives to cold and springs back a few mins later

if the dash matches the gauge readings cant see its a dash problem...the senders dont seem to last very long

Title: Re: 2.3 Temperature Gauge
Post by gozz on Jul 16^th, 2010, 5:13pm

There are two sensors just under the heater hose outlet at the front of the manifold,the frontmost one does the gauge,the other is the sensor for the PCM.
GOZZ.

Title: Re: 2.3 Temperature Gauge
Post by Simmo on Jul 16^th, 2010, 5:13pm

on 07/16/10 at 16:22:03, mondeoman wrote:

Did you check the readings for the display that you were getting?

What exactly did you solder?

There is an article Here (http://www.fordscorpio.co.uk/coolanttempgauge.htm) which may assist.

Title: Re: 2.3 Temperature Gauge
Post by Snoopy on Jul 17^th, 2010, 7:14am

On the 2.3 there is a large plug with a 10mm bolt through it on the offside inner wing?

The temperature sender signal goes through that wiring and if that is taken apart and cleaned with contact cleaner that will most likely cure the problem. There are a multitude of contacts in there and a quick spray and rub over with a fine soft brush and reassemble a couple of times usually does the trick.

I had exactly the same symptoms on my 12v , cleaning that big plug cured the fluctuating temperature gauge. Remained rock steady ever since and read correctly.

Title: Re: 2.3 Temperature Gauge
Post by gozz on Jul 17^th, 2010, 10:06am

Yes Snoopy,it does.
GOZZ.

Title: Re: 2.3 Temperature Gauge
Post by Snoopy on Jul 18^th, 2010, 8:35am

Thanks Gozz post edited to read correct!!!!!!

Title: Re: 2.3 Temperature Gauge
Post by Mike H on Jul 20^th, 2010, 9:40am

on 07/16/10 at 15:31:51, mondeoman wrote:

Well I conducted a dash diagnostics and reboot etc

How do you get into this mode?

Title: Re: 2.3 Temperature Gauge
Post by Tekno on Jul 20^th, 2010, 11:30am

hold trip meter pushed on. when it beeps press it again

Title: Re: 2.3 Temperature Gauge
Post by Simmo on Jul 20^th, 2010, 1:10pm

on 07/20/10 at 11:30:42, Tekno wrote:

hold trip meter pushed on. when it beeps press it again

The full details are Here (http://www.fordscorpio.co.uk/instreset.htm)

Title: Re: 2.3 Temperature Gauge
Post by Mike H on Jul 20^th, 2010, 7:59pm

A-ha! Thanks. ;D So I was not holding it in long enough.

If you'll excuse the expression

Title: Re: 2.3 Temperature Gauge
Post by gozz on Jul 20^th, 2010, 10:05pm

Certainly not ;)

Title: Re: 2.3 Temperature Gauge
Post by Mike H on Jul 20^th, 2010, 11:50pm

http://livinginthepast-audioweb.co.uk/images/misc/tongue.gif

Title: Re: 2.3 Temperature Gauge
Post by mondeoman on Jul 28^th, 2010, 6:53pm

Cleaned the connector block and plug into thermostat with contact spray and it's not solved the issue. Does everyone think the next step is to replace thermostat?

If so then how do you get it out and replace it etc? Someone was telling me at Harewood House that you have to be careful when you screw the new component in, otherwise it shears off?

Cheers,

Simon

Title: Re: 2.3 Temperature Gauge
Post by Tompion on Jul 28^th, 2010, 8:21pm

It sounds as though they may have been talking about the sensor not the thermostat. The sensors have a tapered thread & mustn’t be screwed all the way in. They should just be nipped up with some suitable sealant, I use a few turns PTFE plumbers tape instead.