Surging Revs at Idle

[WeeJase]

not the one attached to your viper induction kit is it?used to be attached into the airbox

 

[jatinder]

Maybe follow the coolant pipes around it might be conected to a pipe, it is on my 8valve

 

[andyj]

stand looking at the front of the car.....
on the right hand end of the engine, you should see the two coolant pipes coming from the radiator.....
where one of then connects to the engine, you should find a sensor plugged into the 'manifold' that conects the pipe to the engine block... that's you CTS

 

[Dave_R]

After a month of looking to see where this sender goes, i decided to go back to the dealer and have them check. I ordered the 4 pin Temp Sender but it turned out to be the 2 pin that was needed

But since the weather as been hot lately the car doesn't seem to surge as much as it did, anyway fitted it yesterday and started to surge when idling, just a little. I'm not 100% happy it's sorted the problem out as it still revs (not as much) but think I have to wait till it's a bit colder one morning to see.

 

[Red Ibiza VR6]

That Temp Sender I got from VW because SEAT were shut all day saturdays, its the 4 pin type but I have looked and looked and looked again and can't find where it goes?

The top hose from the radiator goes to the engine. Where it joins the motor, there is a plastic water outlet piece. There is an electrical connector with 4 wires going to it.

Unplug the plug, then remove the metal u clip with a screwdriver.

Then just pull out your old sensor, twist with pliers if stuck and replace.
If you have the new one ready, there will be minimal fluid loss.

Just make sure you have one rubber seal around the sensor, not 2 or none.

I reckon you`ll plug that in and it`ll be running sweet as.
My T4 van did exactly the same thing and with a new sensor, was sweet. There were no error codes then either.

Good luck, let us know how you get on.

 

[Dave_R]

The top hose from the radiator goes to the engine. Where it joins the motor, there is a plastic water outlet piece. There is an electrical connector with 4 wires going to it.

Unplug the plug, then remove the metal u clip with a screwdriver.

Then just pull out your old sensor, twist with pliers if stuck and replace.
If you have the new one ready, there will be minimal fluid loss.

Just make sure you have one rubber seal around the sensor, not 2 or none.

I reckon you`ll plug that in and it`ll be running sweet as.
My T4 van did exactly the same thing and with a new sensor, was sweet. There were no error codes then either.

Good luck, let us know how you get on.

Where you are thinking that was a metal clip but a plastic block, the temp sender I had to use was on the side of the block (2 pins)

 

[Dave_R]

Right almost a month now since I've fitted the new sensor and with the crappy weather we had the other week, it gave me a chance to see if the car still revs.

Well... in the warm it starts and idles fine but when we had the rain and was a bit colder the engine would surge once again.

Anyone have any other ideas to what this could be? Coming in mind I have tested a different idle control valve and also mine in another car and my car surged and my mates (with my control valve) didn't. It's been tested twice on VAGCOM and no fault codes what so every came up.

Could there be another sensor giving a false reading???