When I recently got my used superb, the heater coil for the glow plugs always seemed to be on a long time when cold (i.e. About 8 to 12 seconds) and then five or six turns to start.

 

I have now installed new glow plugs and now it varies.

I start my car about same time every morning, similar weather etc. Some days it does as above, other days, light goes straight off and it starts first kick.

 

Any ideas what the problem may be.

 

Cheers all.

Coolant temp sensor is a fair bet.

+1

+1

Is this the part I need ?

 

yes,

just make sure to mach code with your engine,

i believe there are two kind of this sensors (with 3 pin and 4 pin)

 

Does your temp gauge sits at 90 when engine is operating a while?

Edited 2 August, 20169 yr by pinstripe

yes,

just make sure to mach code with your engine,

i believe there are two kind of this sensors (with 3 pin and 4 pin)

 

Does your temp gauge sits at 90 when engine is operating a while?

Yep. Dead centre.

still - better to check with climatronic - what is real temp. The gauge sits at 90 even if the real temp is 76 C. (or VCDS)

Yes, dash means nothing.  Mine read 90 when actually it as at 76'C (thermostat opening early).

I have now replaced sensor and glow plugs and just the same. e.g. Yesterday morning, damp cool morning, light on 1 second and started 1st turn. Lunchtime, nice and hot day, lamp on about 15 seconds and about 10 turns to start. I will get it warm today and measure temp with autel.

 

To be continued.

I have now replaced sensor and glow plugs and just the same. e.g. Yesterday morning, damp cool morning, light on 1 second and started 1st turn. Lunchtime, nice and hot day, lamp on about 15 seconds and about 10 turns to start. I will get it warm today and measure temp with autel.

 

To be continued.

Diags reading 88 degrees.