Sky InsuranceChris Nott
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  1. #1
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    2.5TDI needle lift sensor

    VAGcom diagnoses faulty sensor on the injector causes poor starting and smoky exhaust low mpg .Any one know what the sensor does and if when it fails if it causes overfueling thus these symptoms.part costs 300plus vat from Audi

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  3. #2
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    From memory the needle valve regulates and helps to calibrate fuel pump flow in relation to the amount coming out of the injectors, so will very likely be a cause of over fueling. And they are expensive little buggers too.
    Ingolstance Read about my A6 HERE.

  4. #3
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    Thanks James new Bosch injector found for just over 200 due here Mon to be fitted and see if it fixes these probs which have been with us all year

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    Apologies if this is a stupid thing to say...... only one of the injectors has the needle lift sensor on it, so be sure that's the one you're getting!
    Ingolstance Read about my A6 HERE.

  6. #5
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    Seems OK James cos we got part nos from Audi.Car sb back tomorrow hoping to have improvements all round but mostly mpg Quattro triptronic only averidging29 but the similar manual 36 both with tuning boxes

  7. #6
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    Hope the people that took me DIE

  8. #7
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    Quote Originally Posted by A4 nut View Post
    Happy days mate - that was a deal!
    Ingolstance Read about my A6 HERE.

  9. #8
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    Bro.Paul 2.5TDI Quattro Sport

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    Quote Originally Posted by A4 nut View Post
    Feking hell mate, what a deal!

  10. #9
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    have you checked the resistance thru it? should be around 100ohms if memory serves.... if its way off or open circuit you know its faulty.

  11. #10
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    Replacement fitted and there seems much less smoke.Starting OK but always was in cold weather.Now for mpg just refilled full tank shows down to 26mpg but hoping this has sorted unburnt fuel causing smoky exhaust and lets see next refill .Fault code cleared and not returned so seems like we should have fixed this long ago but at 400 you need to be convinced its worth it

  12. #11
    A4 nut's Avatar
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    Glad its all sorted bud hope the mpg goes up keep us posted.



    Hope the people that took me DIE

  13. #12
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    Remember the petrol stations have switched to winter fuel since november so the average mpg will be much lower...
    FOR SALE:
    -Golf mk 5/audi a3 1.6 FSI fuel pump, brand new genuine part boxed + seals
    -audi a3 (1998 to 2003) genuine clutch slave cylinder to fit 1.6 engines BRAND NEW
    -Rear bush press tool to fit new rear axle bushes on Golf Mk3/4, Audi a3/S3, Seat Leon/Toledo, Skoda Octavia mk 1/2 used once

  14. #13
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    Not heard this before Adams How much lower and is this only diesel?

 

 

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