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Author Topic: boost help  (Read 1672 times)

Offline steve_mk4t

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boost help
« on: 16 March 2012, 17:45 »
think i have a boost leak  :sad:

fitted a boost gauge yesterday took her for a spin and i was peaking at abwt 16-18psi and -25 on idle

bust it would hit 18psi then drop all the way back to abwt 8 to 10 psi  :sad:

still pulls like a train just a bit stumped no real sign of leaks looking over then car
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Offline Toby

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Re: boost help
« Reply #1 on: 16 March 2012, 18:00 »
Cpuld be your n75?

Had it scanned?
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Offline steve_mk4t

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Re: boost help
« Reply #2 on: 16 March 2012, 18:12 »
nah i aint dont know anyone with one that aint guna charge me though the roof so think im guna have to invest in one
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Offline Toby

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Re: boost help
« Reply #3 on: 16 March 2012, 18:24 »
Quote from: steve_mk4t on 16 March 2012, 18:12
nah i aint dont know anyone with one that aint guna charge me though the roof so think im guna have to invest in one

worth while investment!
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Offline steve_mk4t

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Re: boost help
« Reply #4 on: 16 March 2012, 18:27 »
yeah guna get one of those ones of ebay abwt 20 qiud
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Offline Toby

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Re: boost help
« Reply #5 on: 16 March 2012, 18:33 »
yeah.

as for boost leaks, go over everything with a fine tooth comb!

the pipe under neath the inlet manofold ( also connected to the inlet mani) is prone to splits as its a oil breather hose.
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Offline steve_mk4t

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Re: boost help
« Reply #6 on: 16 March 2012, 18:41 »
going to check which colour spring i have in my forge spliter valve cos this was fitted when i got the car could dis be a problem?
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Offline Wazzzer

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Re: boost help
« Reply #7 on: 16 March 2012, 18:42 »
boost doesn't just hit 18psi and stay there until the redline...

It will peak then drop slightly, then tail off the higher up the revs you go
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Offline steve_mk4t

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Re: boost help
« Reply #8 on: 16 March 2012, 18:47 »
so there may not be a problem then??? but to drop 10psi???? after it has peaked? i have seen videos on you tube of golfs where it will peak and then drop 2 to 4 psi then hold
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Offline Hulmie

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Re: boost help
« Reply #9 on: 16 March 2012, 20:52 »
mine used to do the same mate, nothing major to worry about.

Could be a boost leak but may not be. You could have a weak actuator, max'd out MAF to get a good idea you would be best getting some data logs done.
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