Problems when warm (Cont'd)

[alien.46.uk]

Hi All,

I posted a while ago about a problem with my 8v '94 GTI. When warming, car runs fine. Temp increases to about normal and start to missfire, and cough and splutter and on the odd occasion eventually cut itself out.

So far the following has been changed:

Coolant
Water Temp Sensor
Dizzy Cap
HT Leads

Wiring has been checked as far as accessable and seems fine. The earth point is fine and solid. The is one of the three threaded bits without a connection attached, but either way the ground for the water temp sensor is on there fine.

As said, when first warming she's fine and will rev freely, when warm she'll cough, splutter, miss and sometimes eventually cut herself out.

No error codes are read and I am in total confusion.

I suspect if the timing was out, she wouldn't run fine on warm up?

I myst also add that when she coughs, splutters and runs rough, when I disconnect the Water Temp sensor, she will go back to running fine and will drive quite nicely also. Plug it back in, all will be fine for a while before going back to it's bad state.

I'm after any more help as it's winding me up now and I need to get her sold soon.

I've taken some pics of the engine bay so anyone can see if anything looks majorly wrong from the pics:

















Large scale images available.

After a Wiring diagram for this model and year to if possible incase its something wrong there.

Many Thanks.

[gtigolfthree]

What have you done with the inlet man temp sensor fitted to the side of the airbox and shown here?
http://www.golfgtiforum.co.uk/index.php?topic=101400.0

[alien.46.uk]

It has been dosconnected. Only just found this wire today.

I didn't do this by the way, was as bought and the previous owner drove around without the water sensor plugged in.

[gtigolfthree]

Well there is your problem then, you will need to get an airbox or a proper induction kit with provision for that sensor. The mk3 is totally run by the ecu and all its sensors.

[alien.46.uk]

This is pretty much what I assumed however in my other post, in the Mk3 bit, not this maintenance bit as I thought this was the wrong place, I was told this shouldn't matter.

I'm going to get one anyway and the pods dont really have any gains in this set-up.