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Author Topic: mk4 gti anniversary problems  (Read 3814 times)

Offline danyo

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mk4 gti anniversary problems
« on: 21 April 2012, 19:02 »
Hi Guys,

i need some advice! i purchased a golf gti anniversary just over a year ago, and had nothing but problems!

the symptoms:

- poor cold start up (misfiring, shuddering etc)
- poor fuel economy (lucky to get 23mpg on motorway and 16 around town)
- loss of power (almost feels like there is no turbo. sometimes it's fine)

the car has been remapped and at one point was running fine so i know how quick it can be, but hasn't been like that for a while.

items replaced already:

- mas airflow meter
- thermostat
- temp sensor
- all coil-packs
- had throttle body cleaned and realigned

after all of this i still have the same problem. every time i get it plugged into diagnostics's it comes up with the same error the thermostat.

i am really stuck and wondered if anyone has had the same problem and managed to sort it?

Cheers, Dan

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Offline barrym381

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Re: mk4 gti anniversary problems
« Reply #1 on: 21 April 2012, 19:07 »
coul try another thermo was it from the dealer ?
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Offline danyo

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Re: mk4 gti anniversary problems
« Reply #2 on: 21 April 2012, 19:15 »
yes straight from vw
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Offline barrym381

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Re: mk4 gti anniversary problems
« Reply #3 on: 21 April 2012, 19:35 »
did you test the thermo before puttin it in
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Offline wsmith

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Re: mk4 gti anniversary problems
« Reply #4 on: 21 April 2012, 20:06 »
i had the same with mine and also put all the new parts on like you than found out that i had two vacuum pipes split ,mine was the one that comes from the top of the engine like a Y shape , the one behind the inlet it was making the car run rich and thats why it had low mpg and juddering, thats what i was told but since having new pipes fitted its all fixed .
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Offline danyo

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Re: mk4 gti anniversary problems
« Reply #5 on: 21 April 2012, 23:10 »
yes i also had one of those vacuum pipes replaced that was located underneath the manifold as it has completely disintegrated. it ran fine for a month or so but then started to happen again. had the same pipes checked and they seem all ok!
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Offline barrym381

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Re: mk4 gti anniversary problems
« Reply #6 on: 21 April 2012, 23:16 »
maybe a diffrent pipe this time were are you located maybe some1 near you can help  :smiley:
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Offline danyo

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Re: mk4 gti anniversary problems
« Reply #7 on: 22 April 2012, 01:00 »
im in a place called redditch, just south of birmingham
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Offline barrym381

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Re: mk4 gti anniversary problems
« Reply #8 on: 22 April 2012, 01:08 »
http://www.golfgtiforum.co.uk/index.php?topic=197918.0
have a look in ther see if any1 is near you maybe they can help some decent ppl on here
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Offline danyo

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Re: mk4 gti anniversary problems
« Reply #9 on: 22 April 2012, 15:54 »
i have a mate who works at vw, even the mechanics there don't know what the problem is!
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