Fuel temperature sensor (2.5 DT, 1997)

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AbingdonBoy

New Member

Posts

4

• Dec 10, 2012

• #1

Hi All,

At the weekend i connected up a Nanocom to the P38, and found that the fuel temperature was showing -8degC (this was before start up, and with an air temp of 8degC and an overnight temp of 0degC) and after warming up (coolant temp 80degC+) it was showing 4degC.

Is the temperature sensor mounted inside the pump? and can i change it?

BTW, fuel consuption is bad (12mpg)...

As always any help much appreciated,

Regards,

AB.

 

JohnnyCrash

New Member

Posts

1,917

• Dec 10, 2012

• #2

The temp sensor is in the top of the FIP on the engine

easy enough to do

How to replace the fuel temperature sensor and injection pump cover seal replacement on VW Audi TDI

 

Saint.V8

Dyed-in-the-wool 100% RR Junkie

Full Member

Posts

16,479

Location

North Dorset - Near the East & West Stours

• Dec 10, 2012

• #3

AbingdonBoy said:

Hi All,

At the weekend i connected up a Nanocom to the P38, and found that the fuel temperature was showing -8degC (this was before start up, and with an air temp of 8degC and an overnight temp of 0degC) and after warming up (coolant temp 80degC+) it was showing 4degC.

Is the temperature sensor mounted inside the pump? and can i change it?

BTW, fuel consuption is bad (12mpg)...

As always any help much appreciated,

Regards,

AB.

Click to expand...

Yep the Sensor is in the Pump....

Can you change it - no Idea - will chack RAVE

Nothing in RAVE for the Fuel Temp Sensor changing

 

JohnnyCrash

New Member

Posts

1,917

• Dec 10, 2012

• #4

Word of warning though, I had the correct Bosch tool and the head just rounded off the security bolt, so hammer on a 7mm socket and replace with a normal cap head bolt

 

wammers

No longer with us, RIP

Donater

Posts

58,170

Location

Preston Lancs.

• Dec 10, 2012

• #5

Yes it can be changed. But fuel temp sensor showing a lower than engine ambient temp should not cause bad fuel consumption it is measuring the temp of the fuel coming from the tank. The lower the fuel temp the more dense the fuel so less is injected. Depending on how many miles it is showing. A good general service including cleaning of the intercooler may improve the consumption. Having the injectors serviced and pump timing checked would usually give good results. But you will always get higher fuel usage on winter diesel.

 

Last edited: Dec 10, 2012

JohnnyCrash

New Member

Posts

1,917

• Dec 10, 2012

• #6

try running on Black diesel then if you want better MPG as engine oil has a much higher calorific value then pump diesel

a P38 on black should average up to 32 mpg

but pay your tax or risk loosing your car!