Petrol VS Diesel i'm confused!

Pew_Pew_Pew_Lasers!

The temperature sensor is very important. Does your needle drop instantly, or slowly (over a period of minutes)?

pault123

Pew_Pew_Pew_Lasers! wrote: »

The temperature sensor is very important. Does your needle drop instantly, or slowly (over a period of minutes)?

Strangly enough its only done it over a space of 2 days earlier last week. Once it reaches middle of the dial which is normal operating temp, it slowly starts to fall and stays on the far left like the engines cold.

Once I restart it after a short stop it goes straight up to the middle.

I'm thinking its a loose connection somewhere?

Pew_Pew_Pew_Lasers!

Does the heating work throughout, when it does this?

pault123

Its got air conditioning so i'm not sure how I would test this?

There is an ECON button which may use engine heat?

Pew_Pew_Pew_Lasers!

Air conditioning can be on when the temperature is fully on. What I mean is, when the temperature sensor reads 0, do you still get plenty of heat from the vents, or does it struggle to keep you warm?

pault123

Pew_Pew_Pew_Lasers! wrote: »

Air conditioning can be on when the temperature is fully on. What I mean is, when the temperature sensor reads 0, do you still get plenty of heat from the vents, or does it struggle to keep you warm?

Yes still very toasty :j

Pew_Pew_Pew_Lasers!

Then at least coolant is circulating. I suggest you investigate replacing the temperature sender, I don't know where it will be but a model-specific forum for your car will get an answer.

drewwa

Paul,

This might all be old news by now - sorry, missed the thread!!

The temperature sensor going bad caused the following on both our Audi and Passat

1. Occasional rough starting (sounding like running on 3 cylinders)
2. Idle high (2500rpm at startup!) for 10 seconds and then normal
3. 5mpg-ish drop in fuel economy
4. Smoke on startup
5. Temperature gauge on dashboard dropped to zero, returned, dropped to zero for a while and finally stopped working all together.

Replaced the sensor (about £30 + labour as I recall) on both cars. Both cars transformed - definitely worth doing. All problems went away. It also cured an intermittent problem on my Audi where the ECU would go into 'limp home' mode on heavy acceleration (ahem )

Cheers,

Drew.

pault123

drewwa wrote: »

Paul,

This might all be old news by now - sorry, missed the thread!!

The temperature sensor going bad caused the following on both our Audi and Passat

1. Occasional rough starting (sounding like running on 3 cylinders)
2. Idle high (2500rpm at startup!) for 10 seconds and then normal
3. 5mpg-ish drop in fuel economy
4. Smoke on startup
5. Temperature gauge on dashboard dropped to zero, returned, dropped to zero for a while and finally stopped working all together.

Replaced the sensor (about £30 + labour as I recall) on both cars. Both cars transformed - definitely worth doing. All problems went away. It also cured an intermittent problem on my Audi where the ECU would go into 'limp home' mode on heavy acceleration (ahem )

Cheers,

Drew.

Thanks for help guys replaced the temp sender cost £20 fitted. Works a treat now, and better performance to boot.

In terms of the OP and my question on petrol vs diesel, i'm getting on average 600 miles per tank with the diesel, my petrol used to average 325. But my fuel bill certainly isn't double an extra £15 -approx which for double the milage is a ridiculous testament as to the benefits of Diesel! :beer: