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TDI

Discussion in 'A4/S4 forum(B5 Chassis)' started by t2myd, Nov 24, 2009.

  1. t2myd
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    t2myd Member

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    my a4 tdi afn is coming up with needle lift sensor fault , will this throw the car into limp mode ive changed loads of sensors and this keeps comeing up
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  2. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator

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    Needle lift sensor is in on of the injectors i think. And yes it will cause limp mode.
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  3. t2myd
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    t2myd Member

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    its the only thing i havent changed ,
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  4. redevo1
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    redevo1 Member

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    How did you get on?
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  5. t2myd
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    t2myd Member

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    yeah ,cars running perfect now ,turned out to have a loose connection on the boost solanoid, loads of power now
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  6. JohnC
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    JohnC Member

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    I appear to have exactly the same problem. Stopped off on the way home from work and when I started the engine again the revs rose to just over 2k rpm for about a second before it settled to idle. Pulling away I noticed a lack of power and general sluggishness which I assume is limp mode. No warning lights or smoke under acceleration.

    Did you need to do a VAG-COM scan to locate the boost solenoid problem, and is it easy to get to? I have no idea where this is in the engine.

    Car is a '98 1.9TDi quattro AFN engine with 183k miles.
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  7. t2myd
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    t2myd Member

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    :yahoo: mine turned out to have 2 wires mixed up , realy got on my nerves for 6 months trying diferent sensors ,and puting it on vag com , pulls realy well now , especialy after the de,cat .was around 145 bhp with remap . definatly more now that turbos been cleaned and decated , If you need any sensors email me ive got some spare. tommydavieson@hotmail.co.uk )
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  8. redevo1
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    redevo1 Member

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    I ended up biting the bullet and took it to a diesel specialist turned out mine was a sensor on the fuel pump?
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  9. t2myd
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    t2myd Member

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    there a brilliant car when there running perfect ,but when there not there a pain in the a@se .ive had mine 3 years ,it was justy a car a bought off my mate ,in fact ive never realy drove it , troubles started when i lent the car to a good mate ,and problems started from there
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