Author Topic: fitted boost gauge and it reads minus .1 bar on boost  (Read 4857 times)

Offline gavgtiturbo

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fitted a boost gauge to the 1.8t today and it reads minus .1 bar on full boost it just holds it at that when it comes in,i do think the car is slow but i am used to quicker cars so has anyone got any ideas,could be a faulty gauge,ive changed the boost hoses incase there was a leak,its still the same,its allways driven like this not rapid but not over slow so im not sure what to do next,i think i may order an n75 valve and try that??
I put the t piece here and tapped off for the boost gauge i think this is correct??   

Offline topher

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #1 on: 19 June 2010, 19:48 »
it shouldn't be negative when on song.. unless the car is REALLY slow

does the needle sit on 0 when the engine is off?

Offline gavgtiturbo

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #2 on: 19 June 2010, 21:44 »
it shouldn't be negative when on song.. unless the car is REALLY slow

does the needle sit on 0 when the engine is off?
Ive just been out and had a look when the engine is off and key out it sits at -.06

jamie16v

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #3 on: 19 June 2010, 22:18 »
is it a chinaman jobby gauge?.. i have been looking to buy a cheap one but was put off by thinking they will be more innacurate than the one i already have..

Offline northeast_gti-t

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #4 on: 19 June 2010, 23:44 »
could be a faulty gauge  :huh:
the pic you show where you have tapped into the fpr line with a t and vac line is correct
2000 Mkiv GTi 1.8T AGU

Offline Wazzzer

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #5 on: 20 June 2010, 10:21 »
it shouldn't be negative when on song.. unless the car is REALLY slow

does the needle sit on 0 when the engine is off?
Ive just been out and had a look when the engine is off and key out it sits at -.06

It's not sat in the right place when it's off so it won't read right when running, you need to zero it somehow


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Offline ade_aidy_ady

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #6 on: 20 June 2010, 16:25 »
what was did you manged to get the gauge into the vent.... ?

is it an option to file/grind out the necessary hole to slot the gauge in....?


Offline gavgtiturbo

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #7 on: 20 June 2010, 20:47 »
could be a faulty gauge  :huh:
the pic you show where you have tapped into the fpr line with a t and vac line is correct
It was a faulty gauge ive sorted it took it to bits and all is good :nerd:

Offline gavgtiturbo

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #8 on: 20 June 2010, 21:00 »
what was did you manged to get the gauge into the vent.... ?

is it an option to file/grind out the necessary hole to slot the gauge in....?


I just chopped the vent with some sharp snipps and drilled a hole for the vac tube to go through the heater pipe it was easy took 30 mins from start to finnish :cool:,the hardest bit was running the vac tube through the bulk head, theres a large grommit on the passanger side (under the glove box to the left behind some sound deadening)i put a slim 12 inch screw driver through the rubber grommit and taped the vac tube to it and pulled it in to the car and hey presto job done :wink:

Offline northeast_gti-t

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Re: fitted boost gauge and it reads minus .1 bar on boost
« Reply #9 on: 20 June 2010, 21:53 »
could be a faulty gauge  :huh:
the pic you show where you have tapped into the fpr line with a t and vac line is correct
It was a faulty gauge ive sorted it took it to bits and all is good :nerd:
:afro: so its reading as it should be now then  :wink:
2000 Mkiv GTi 1.8T AGU