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General => The garage => Topic started by: burstlikeabubble on 06 February 2011, 14:36

Title: '94 MK3 16v Gti rough running when cold. ECU Temp Sensor?
Post by: burstlikeabubble on 06 February 2011, 14:36

My golf runs rough when cold and is fine when warm and from what i have read it could be the ECU Temperature sensor.

I have the new sensor in my hand but cannot find it on the engine anywhere to replace it. Can anyone tell me where it is and if i am going in the right direction?

By the way the temperature gauge seems to be working fine and the digital temp display on the right stalk only states a temp when 50 degree celcius and above is this normal?

Thanks

Phil

Title: Re: '94 MK3 16v Gti rough running when cold. ECU Temp Sensor?
Post by: burstlikeabubble on 06 February 2011, 14:37

By the way the new part i have in my hand is this:
http://partfinder.smpeurope.com/index.html?p=156&partid=52302&from=153&recordset=208&value=52302

Here is my engine
(http://i53.tinypic.com/2mos9vt.jpg)

I have found a small sensor on the right hand side of the engine but it is different to the new one i have.

Title: Re: '94 MK3 16v Gti rough running when cold. ECU Temp Sensor?
Post by: muzo26 on 06 February 2011, 15:29

  Hi try this;    http://www.golfgtiforum.co.uk/index.php?topic=101400.0

Title: Re: '94 MK3 16v Gti rough running when cold. ECU Temp Sensor?
Post by: rubjonny on 07 February 2011, 14:48

thats the wrong sensor, looks like a mk2 or mk3 8v sensor to me. go to vw for this one:
026 906 161 - temp sensor, white, m10x1 - 32.24+VAT

Title: Re: '94 MK3 16v Gti rough running when cold. ECU Temp Sensor?
Post by: burstlikeabubble on 08 February 2011, 17:52

Quote from: rubjonny on 07 February 2011, 14:48

thats the wrong sensor, looks like a mk2 or mk3 8v sensor to me. go to vw for this one:
026 906 161 - temp sensor, white, m10x1 - 32.24+VAT

Yeah it was the wrong one.

I am going to clean the idle valve up by soaking it in petrol for a couple of hours and see if that makes a difference.

If it doesn't then I will try unplugging the airflow meter and see if it performs better. Can't afford a new airflow meter mind and I am guessing second hand ones will be a bit hit or miss so we will have to see  :smiley:

Title: Re: '94 MK3 16v Gti rough running when cold. ECU Temp Sensor?
Post by: Khare on 08 February 2011, 17:58

16v has no airflow meter. Just intake air temperature sensor.

I suggest you clean ISV as you're doing already, clean the throttle body, and replace the coolant temp sensor with the one rubjonny posted, it's the safe bet (VW).