golf 1.8t boost problems

[darren1.8t]

hi guys i have just got my t reg golf 1.8t 20v i was given the car yesturday now the problem is my mates old 1.8t use to be quick when ya put ya foot down his use to boost up really well..

when i put my foot down it just feels like a standard 1.8 with no turbo!!!! i have checked for leaks and cant find any. i can just about here the turbo coming on its very faint. i was told about the n75 valve but how can i test it? also could it be the turbo? its not the airflow meter as i have tested that? has anyone had this problem how can i test the turbo etc any replys will be good cheers everyone

[richw911]

First thing to do is get it on Vag Com or a code reader and see whats going on 

[TDIgadge]

hi guys i have just got my t reg golf 1.8t 20v i was given the car yesturday now the problem is my mates old 1.8t use to be quick when ya put ya foot down his use to boost up really well..

when i put my foot down it just feels like a standard 1.8 with no turbo!!!! i have checked for leaks and cant find any. i can just about here the turbo coming on its very faint. i was told about the n75 valve but how can i test it? also could it be the turbo? its not the airflow meter as i have tested that? has anyone had this problem how can i test the turbo etc any replys will be good cheers everyone

Yours standard and his chipped perhaps?  Ask him, not very quick in 150 standard trim

[TJJONESVDUB]

As said above get it on a Vag com im sure there is someone in your area from here that will give you a hand 

[darren1.8t]

cheers guys my dads mate is gonna plug it in tommorrow i hope its drinking fuel is there anything else i can check while i wait cheers lads

[darren1.8t]

hi guys i have just got my t reg golf 1.8t 20v i was given the car yesturday now the problem is my mates old 1.8t use to be quick when ya put ya foot down his use to boost up really well..

when i put my foot down it just feels like a standard 1.8 with no turbo!!!! i have checked for leaks and cant find any. i can just about here the turbo coming on its very faint. i was told about the n75 valve but how can i test it? also could it be the turbo? its not the airflow meter as i have tested that? has anyone had this problem how can i test the turbo etc any replys will be good cheers everyone

Yours standard and his chipped perhaps?  Ask him, not very quick in 150 standard trim

no mate both standard i have just sold my astra sri and thats quicker than my golf

[northeast_gti-t]

hi guys i have just got my t reg golf 1.8t 20v i was given the car yesturday now the problem is my mates old 1.8t use to be quick when ya put ya foot down his use to boost up really well..

when i put my foot down it just feels like a standard 1.8 with no turbo!!!! i have checked for leaks and cant find any. i can just about here the turbo coming on its very faint. i was told about the n75 valve but how can i test it? also could it be the turbo? its not the airflow meter as i have tested that? has anyone had this problem how can i test the turbo etc any replys will be good cheers everyone

Yours standard and his chipped perhaps?  Ask him, not very quick in 150 standard trim

no mate both standard i have just sold my astra sri and thats quicker than my golf

defo wouldnt be once the golf was mapped  and anyway *cough* its a vauxhall 

[darren1.8t]

hi guys i have just got my t reg golf 1.8t 20v i was given the car yesturday now the problem is my mates old 1.8t use to be quick when ya put ya foot down his use to boost up really well..

when i put my foot down it just feels like a standard 1.8 with no turbo!!!! i have checked for leaks and cant find any. i can just about here the turbo coming on its very faint. i was told about the n75 valve but how can i test it? also could it be the turbo? its not the airflow meter as i have tested that? has anyone had this problem how can i test the turbo etc any replys will be good cheers everyone

Yours standard and his chipped perhaps?  Ask him, not very quick in 150 standard trim

no mate both standard i have just sold my astra sri and thats quicker than my golf

defo wouldnt be once the golf was mapped  and anyway *cough* its a vauxhall 

just had i plugged in and it said the n75 valve was shot.. so i put a new one on and its still the same?? does anyone no if ya can here the turbo working usually?? as mine is very faint or is there a way i can up the boost cheers

[leeroy86]

just had i plugged in and it said the n75 valve was shot.. so i put a new one on and its still the same?? does anyone no if ya can here the turbo working usually?? as mine is very faint or is there a way i can up the boost cheers
[/quote]


you shouldnt be able to hear the turbo unless you have a BOOST LEAK 

best thing to do mate is get it on the rollers and see how much boost its running etc. R-TECH only charge £35 i think? i took mine to R-TECH for mapping and when they put it on the rollers in standard trim it was 150.6 hp and boosting 8psi just how it should. mine is a s reg (10 years old  )

your problem may be nothing but baring in mind there is more than one n75 code on vag com.

Have you had a look around the turbo intake pipe (TIP)?

have a look around the electronic boost controller (n75) make sure all wires are in tact and connections ect.

if all else fails eitherr 1) get some advice of some knowledgeable guys of ere  2) plug it back in to vag com or 2) get it to a rolling road.

hope you get it all sorted mate.

lee

[Jennifer_A]

Two things that I had problems with were:

- Check vacuum pipe activating dump valve (the valve next to N75 / boost control valve)
- Check for play on the waste gate on the turbo, sometimes the factory setting isn't perfect or the lock nuts moved causing a slight boost leak which is what happened to my MK4 GTI 1.8T - the car was sluggish on low rpm, had a slight jerk when just touching the accellerator and boost only started @ 3000rpm with strong pulling @ 3500 rpm, after adjusting the actuator arm by 2 / 3 threads to force the waste gate valve on the turbo a bit more closed my car has much more power on low rpm, the slight jerking is gone and the turbo starts boosting @ 2250 rpm