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Author Boost gauge hissing / rattling on full boost
gtitim
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Registered: 13th Feb 05
Location: the boonies
User status: Offline
15th Dec 10 at 08:05   View User's Profile U2U Member Reply With Quote
Morning,

Appreciate this is a Corsa site, but the knowledge of engines far surpasses mine, so i shall ask:

Fitted a boost gauge to my Octavia VRS 1.8T yeterday. Car is boosting fine and boosting to 0.7bar which is what i expected. However, on full boost the gauge hisses /rattles. It's not massively loud, but is annoying. Gauge is brand new and the takeoff is from the pipe on the fuel pressure regulator.

Any ideas why? Broken gauge? leaking / trapped pipe?
taylorboosh
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Registered: 3rd Apr 07
User status: Offline
15th Dec 10 at 08:17   View User's Profile U2U Member Reply With Quote
I had a 1.8t golf and my gauge dis the same. Get it mapped and it will be worse. Perfectly normal
corsav6_mut
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Registered: 17th Feb 10
Location: lincoln
User status: Offline
15th Dec 10 at 12:00   View User's Profile U2U Member Reply With Quote
Does the boost pipe go to the back of the gauge or to an electrical sensor under the bonnet?
Brett
Premium Member

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Registered: 16th Dec 02
Location: Manchester
User status: Offline
15th Dec 10 at 12:02   View Garage View User's Profile U2U Member Reply With Quote
Been a while since I had a gauge, but I'm sure mine didn't hiss. Doesn't that mean it's leaking?
P1CK4D
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Registered: 19th Jun 06
Location: Around Essex Somewhere
User status: Offline
15th Dec 10 at 12:07   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by loafofbrett
Mine doesn't hiss. Doesn't that mean it's leaking?


I would have to agree with this tbh.
flybikeslee
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Registered: 2nd Jan 07
Location: Liverpool
User status: Offline
15th Dec 10 at 12:10   View User's Profile U2U Member Reply With Quote
mine doesn't do this.
on another note..pics of car?
gtitim
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Registered: 13th Feb 05
Location: the boonies
User status: Offline
15th Dec 10 at 12:13   View User's Profile U2U Member Reply With Quote
car is dirty - pics when clean

Pipe goes from gauge to the fuel pressure regulator. It buzzes / hisses / vibrates on full boost.

I will get another hose and replace it tomorrow to see if it is leaking, but it doesnt seem to be.
alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
User status: Offline
15th Dec 10 at 12:17   View User's Profile U2U Member Reply With Quote
if it's a mechanical boost gauge and it's hissing I'd say the number one cause of that would be that it's leaking.
corsav6_mut
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Registered: 17th Feb 10
Location: lincoln
User status: Offline
15th Dec 10 at 12:19   View User's Profile U2U Member Reply With Quote
My mates on his astra is fine but its a digital 1 so there's no pressure near the actual gauge sounds like it is leaking
gtitim
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Registered: 13th Feb 05
Location: the boonies
User status: Offline
15th Dec 10 at 12:25   View User's Profile U2U Member Reply With Quote
I think i must have punctured or split the pipe somewhere when fitting - will go buy a new pip and dummy fit it and try that
craig_s
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Registered: 5th Mar 06
Location: Birmingham Drives: mk4 astra gsi
User status: Offline
15th Dec 10 at 18:19   View User's Profile U2U Member Reply With Quote
mines a mech one and it don't hiss at all,maybe an idea to put a pump on the end of the pipe to test the gauge and see if it leaks.
gtitim
Member
Registered: 13th Feb 05
Location: the boonies
User status: Offline
15th Dec 10 at 19:45   View User's Profile U2U Member Reply With Quote
Found the problem - gauge is knackered. Bought another one to test it, and it works fine. now got to mess about and send mine back to ebay. Great!
flybikeslee
Member
Registered: 2nd Jan 07
Location: Liverpool
User status: Offline
15th Dec 10 at 21:57   View User's Profile U2U Member Reply With Quote
easier than pissing round with turbo hoses though!

 
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