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Model specific boards => Golf mk4 => Golf mk4 TDI => Topic started by: jlw41 on 24 July 2011, 15:05
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hi, im faily new to the mk4 scene, got my self a mk4 gt tdi 115 a month or 2 ago :)
but now i have no boost and no fault codes and im kind of stuck with what it could be? im thinking possibly n75?
a few weeks ago i had a vnt clean and wd40'd the actuactor as it had been sat for a year ish and had an overboost problem and this sorted that
any help or advise would be great! thanks :)
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ok just a quick uptate, just scanned it again after a spin and its back to 17958
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Huge boost leak? Check your pipes.
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ive checked all the pipes and cant find a leak anywhere :(
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Checked the vacuum lines?
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yeah ive checked them too and they all seem fine to :undecided:
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Got a mate with an N75 valve you can try?
http://www.myturbodiesel.com/1000q/multi/limp-mode-TDI-fix.htm
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nope i dont know anyone else with one, unless the 110 is the same part?
there only about £25 from tps i think so ill give it ago :smiley:
it did always used to buzz after i turned the car off and now it doesnt do anything?
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Whereabouts you located? Anyone near you with VAGCOM?
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down im poole fella :)
erm yeah with abit of asking im sure i could find someone, is there a way to test it then?
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down im poole fella :)
erm yeah with abit of asking im sure i could find someone, is there a way to test it then?
I think there is an output test of some kind for the N75 valve which opens and closes the vanes on the turbo. You can hear the engine pitch change when it does this :smiley:
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ahh right ill get asking about nicely now then :grin:
is there anything else it could be that i could look for or use vag com for while im there?
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ahh right ill get asking about nicely now then :grin:
is there anything else it could be that i could look for or use vag com for while im there?
You can log requested vs actual boost so that will give an indication of if you have either a boost leak or a fooked turbo
Does your turbo make any noise at all when you rev the engine? Can you hear it at all?
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ahh right ill get asking about nicely now then :grin:
is there anything else it could be that i could look for or use vag com for while im there?
You can log requested vs actual boost so that will give an indication of if you have either a boost leak or a fooked turbo
Does your turbo make any noise at all when you rev the engine? Can you hear it at all?
i think theres a slight whisle but thats about it not as loud as before though
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ahh right ill get asking about nicely now then :grin:
is there anything else it could be that i could look for or use vag com for while im there?
You can log requested vs actual boost so that will give an indication of if you have either a boost leak or a fooked turbo
Does your turbo make any noise at all when you rev the engine? Can you hear it at all?
i think theres a slight whisle but thats about it not as loud as before though
Lost any oil?? Any smoke coming from the exhaust?
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nope hasnt used any oil sice ive had it and no smoke that ive noticed apart from the occasional bit when you boot it but thats just part of having a derve isnt it? :grin:
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nope hasnt used any oil sice ive had it and no smoke that ive noticed apart from the occasional bit when you boot it but thats just part of having a derve isnt it? :grin:
Small amount of black smoke is usual :smiley:
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nope hasnt used any oil sice ive had it and no smoke that ive noticed apart from the occasional bit when you boot it but thats just part of having a derve isnt it? :grin:
Small amount of black smoke is usual :smiley:
thats all good then, so a list of stuff to double check tomorrow after work is
vac lines
boost leaks
actuactor movement
try and find someone with vag com to test the n75
anything else?
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nope hasnt used any oil sice ive had it and no smoke that ive noticed apart from the occasional bit when you boot it but thats just part of having a derve isnt it? :grin:
Small amount of black smoke is usual :smiley:
thats all good then, so a list of stuff to double check tomorrow after work is
vac lines
boost leaks
actuactor movement
try and find someone with vag com to test the n75
anything else?
Pray it isn't your turbo lol
Good luck and let us know :smiley:
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yeah i dont fancy the bill for that! :grin:
cheers for the help!!
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If you could get to Dorchester I could have a look for you.
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If you could get to Dorchester I could have a look for you.
im borrowing an n75 tonight to try tonight and check over the other things while im there if i dont have any luck ill drop you a pm! cheers!
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right new n75 tried and no different, couldnt find any boost leaks or vac leaks :(
the actuactor seems almost too free now and there isnt any vacume noise from it like there was before :/
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turns out it is the actuactor :(
but the place i took it too wont change just that, saying i need it re con'd how easy are they to fit?
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turns out it is the actuactor :(
but the place i took it too wont change just that, saying i need it re con'd how easy are they to fit?
You can change them separately but its not exactly the best course of practice :undecided: They are about £60 :smiley:
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turns out it is the actuactor :(
but the place i took it too wont change just that, saying i need it re con'd how easy are they to fit?
You can change them separately but its not exactly the best course of practice :undecided: They are about £60 :smiley:
i know but it may tide me over for abit till i can save up the £800 odd for the refurb though :/
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try a turbo clean may free up the vains so the actuator works. solved my overboosting problem for a year and half
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try a turbo clean may free up the vains so the actuator works. solved my overboosting problem for a year and half
ive already had that done fella! now the actuactor is ruined and wont hold any pressure :(