Glow Plug Temperature Sensor

[ninjakev]

Can anyone tell me which temperature sensor controls the engine glowplugs, and more importantly, where it is located - this is the last thing i have to check in the saga of my poor cold starting.

 

Thanks.

[ninjakev]

Jeez, not even a single reply yet.......................surely someone must know something ;)

[becky]

did you find out, because that's what i need to know too!

[marinabrid]

on the mk 1 its in the coolant hose that comes form the cylinder head, usally got a yellow ring round it

its a plug in 2 wire jobby, it sends info to ecu about the temp which then activates the glowplugs

i think the mk 2 has the same arrangment but the thing is located at the back of the engine out of sight. whereas the mk 1 is easy to get at , in the middle just in fornt of glowplugs on cly head

[tdi90]

Did that cure your starting problems?

 

I've had major c/starting issues with my 1999 TDi. Mine turned out to be a break in the main feed wire to the glow plugs. Ford dont supply that part of the loom anymore, and VW didnt want to know :wacko:

 

Mechanic is having to cut the damaged section out and slice in a new bit.

[marinabrid]

not had any starting problems , touch wood.

i think the glow plugs on these are only heated when very cold. i belive the engines start well without glowplug use , unless below freezig point. i could e wrong on that but i think i read it on here.

if its just cranking over and not attemping to fire it could be worth changing the sensor, the tis says to drain the coolant but i just pulled out the clip and let it run , didnt lose much. then replace the sensor. its only held in by a bit of a metal u shape clip and an o ring seal.

other than that ive heard the glowplug relay can cause problems.

or mine wouldnt start when on eof the mini fuse was loose, check them as well that they are all pushed fully home.

[Scorpiorefugee]

I chased this one around for some time. As ssomeone has already said, the sensor is in a plastic moulding with a sort of circlip fitting holding it in just above and slightly forward of the centre of the rocker cover. It is a bit of a *&$ to get out and you will loose a bit of water. do make sure you replace the O ring properly. Also, be cateful with the wires, paricularly the earth, as they get very brittle and break off.

 

It does, in fact have 2 sensors in the one unit and one seems to be used for the dash temperature indicator and the other for the ECU. Yo can prove a point by simply disconnecting it. The engine temp gauge will read low but the glow plug light should come on for about 15 secs every time.

 

One clue to the problem is that the cooling fans come on for a while every tme you switch the engine off, even when it is cold. Mine cost about

Edited March 17, 2008 by Scorpiorefugee