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Author Topic: coolant temperature sensor  (Read 14262 times)
rickuk72
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« on: March 02, 2009, 05:47:08 pm »

ok i've still got this problem of the car stalling....now getting worse.
have changed o2 sensor
checked air control valve and cleaned
map sensor ok
had car running tonight and the engine is 'hunting'
have also noticed coolant is slowly dropping. no leaks from pipes and compression test done ok
going to change the CTS but need to locate a new part
have the number 269331 but nothing is coming up with that......it's the CTS with the green connector
Does anyone know where i can get one from Huh??

99 v6 24v grand espace

thanks all
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Martin Tyas
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« Reply #1 on: March 03, 2009, 03:01:36 pm »

Try Simpson Supplies

https://www.simpsonsupplies.co.uk/ENGINE_MANAGEMENT_PARTS/WATER_TEMPERATURE_SENSOR/
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rickuk72
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Posts: 15


« Reply #2 on: March 03, 2009, 06:03:45 pm »

yes tried them.....ended up with the wrong one Sad

thanks anyway !
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rickuk72
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Posts: 15


« Reply #3 on: March 05, 2009, 01:43:51 pm »

ok....not sure what else to do. have change all the sensors I can and the car is still playing up.
The car is NOT stalling now....but now it is reving slightly high till it hits 3 bars on temp gauge the the engine starts to hunt continuously. when you put a load on it..ie put it in car or rev slightly...it stops.
Any ideas please........help!!!! Smiley

Richard
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Elmo the Espace
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« Reply #4 on: March 05, 2009, 06:52:11 pm »

Hi Richard
I would try GSF and qoute the Intermotor part number 55519 Engine Management Temperature Sensor, which is the green top sensor.
If you want to check the intermotor website try http://partfinder.smpeurope.com/index.html?p=1.

I had a similar fault with my 2.0 8v which turned out to be the air temp intake sensor but i also changes the coolent sensor which was only £12.00 ish from GSF.
Hope this helps.
Chris
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1965 Land rover 2a SWB
1966 Land Rover 2a SWB
2 x 1994 2.0i Espace's
Transit 140 bhp limited SWB 2009
rickuk72
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Posts: 15


« Reply #5 on: March 05, 2009, 07:26:05 pm »

thanks for that.....have changed that also.
Only one not changed is the throttle position sensor.......have just unplugged it while running the engine and the hunting has stopped but the revs are high still.......so i'm hoping this is my problem and will replace that and see what happens.
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rickuk72
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Posts: 15


« Reply #6 on: March 07, 2009, 09:00:14 pm »

ok  so i replaced the throttle sensor......no good Sad
engine still hunting after temp reaches 3 bars on the gauge.
any ideas guys...i'm all out HuhHuhHuh?
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Elmo the Espace
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« Reply #7 on: March 08, 2009, 12:32:16 am »

Have you checked the Lambda sensor.
It may be the heater element has failed, causing the ecu to give a lean mixture on warm up. If it is a 3 wire i have a spare lucas one but you will have to cut and crimp your existing cables.
It also is worth checking your dizzy cap ht leads and spark plugs.
Have you tried disconecting the ecu and using a AVO check the cables to all the sensors to see if you have any resistance in the cables or earth faults unfortunatly i do not have a wire diagram for your model so i cant help with pin to sensor numbers.
Other then that your going to have to acces the error codes im not sure if your espace is odb complient, if not its the main stealer.
I take it your engine management light comes on.
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1965 Land rover 2a SWB
1966 Land Rover 2a SWB
2 x 1994 2.0i Espace's
Transit 140 bhp limited SWB 2009
rickuk72
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Posts: 15


« Reply #8 on: March 08, 2009, 01:10:46 am »

lambda was the first thing i changed.....when had the cam belt done along with water pump, belts and plugs... renault told me there was an o2 fault so i changed it.
had a mechanic round yesterday who hooked up to the engine said there was a couple of faults on there but they should clear now that i have replaced all the sensors.
have checked all cables and checked for a bad earth....nothing.
have disconnected the throttle sensor for now which stops the hunting and will have to put up with the high revs.
not gonna take it to renault....robbing bast**ds....never know what their doing anyway !

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Anders Dinsen
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« Reply #9 on: March 08, 2009, 01:26:40 am »

Rick, you need to have a computer hooked up to the car while you are driving it to check for any sensors playing up with you.

The O2 failure you originally saw was probably because of some other sensor giving a bad reading, most likely the coolant temperature sensor. If it fails, the ECU will think the engine is colder or warmer than it actually is. The ECU will then make the mixture richer or leaner, but to an extent where the O2 sensor can't really cope with it any more. The O2 sensor is only for fine tuning the mixture, and mostly while the engine is idling. The ECU will then decide that the O2 sensor is faulty, where it is actually the temperature sensor that is causing the trouble.

Inexperienced mechanics tend to do what the computer tells them to do Sad

Are you sure the coolant temperature sensor you fitted is the correct one? There are two sensors fitted next to each other, one is for the ECU (with a green connector), the other is for the dash.

Was the cam belt job done professionally using the right tools?

- Anders
« Last Edit: March 08, 2009, 01:29:05 am by Anders Dinsen » Logged

1982 Talbot Matra Murena 2.2 prep 142
2017 BMW i3 "Charged Professional" 94Ah

Used to own:
2001 Renault Matra Grand Espace "The Race" V6 24v
1997 Renault Matra Espace 2.0 8V
1987 Renault Matra Espace J11 2.2
rickuk72
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« Reply #10 on: March 08, 2009, 07:18:24 am »

yes coolant sensor was the green connector one. as for cam belt being done properly.....renault did it all....so you make up your mind on that lol
maybe a dodgey new sensor Huh??
computer was running both with engine off and whilest running and engaging gears.
would air in coolant system make any difference ?
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Elmo the Espace
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« Reply #11 on: March 08, 2009, 11:03:20 am »

I wonder if your thermostat is sticking open causing the sensor to read incorrectly.
Is the sensor in the block or the thermostat housing.
Did your espace drive ok before the cam belt was changed as if it has to much tension it will affect the advance and retard of the engine under load.
Not sure about air locks, but have you noticed any difference on the time i takes to warm up or is it running cooler than normal.
There is aso a spead sensor on your gearbox or speedo cable you could try disconecting that.
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1965 Land rover 2a SWB
1966 Land Rover 2a SWB
2 x 1994 2.0i Espace's
Transit 140 bhp limited SWB 2009
Anders Dinsen
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« Reply #12 on: March 08, 2009, 02:12:58 pm »

I really think there's only one way to diagnose this: Take diagnostic computer with you on a ride with the mechanic and watch what's going on. When the engine starts running badly, it should show up on the computer right away.  It's important that the car is driven under realistic load (i.e. not with freely spinning wheels).

If not, then something else is wrong: Cam timing could be off, or the inlet manifold could have a leak if it hasn't been boltet onto the heads properly.

- Anders
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1982 Talbot Matra Murena 2.2 prep 142
2017 BMW i3 "Charged Professional" 94Ah

Used to own:
2001 Renault Matra Grand Espace "The Race" V6 24v
1997 Renault Matra Espace 2.0 8V
1987 Renault Matra Espace J11 2.2
Elmo the Espace
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Posts: 46


« Reply #13 on: March 11, 2009, 01:26:10 am »

Hi
Have you had any luck sorting out the hunting problem with your espace ?.
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1965 Land rover 2a SWB
1966 Land Rover 2a SWB
2 x 1994 2.0i Espace's
Transit 140 bhp limited SWB 2009
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