Boost gauge fluctuations - Subaru WRX Forum
 
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post #1 of 6 Old 01-29-2010, 02:02 PM Thread Starter
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Angry Boost gauge fluctuations

so i have a cheap mech boost gauge (equuis) but i had it professionally installed at Allmakes a subaru specialsit here in calgary and it does a couple strange things which may or may not be related to a boost leak, or high frequancy air fluctuations from what i've seen on the internet.

at idle it stands around -20 (which is perfect)
under light acceleration the needle jumpsback and fourth pretty intensley untill i reaches 0.
creating boost (0-about 11-12psi) the gauge makes a rattleing sound that is absolutely BRUTAL

Now i understand that gauges are often off a couple psi espically cheap crap gauges like mine buuut my issue is that i have no idea where Allmakes tapped into i've taken an extremely close look at all the vac lines from the wastegate to the bov line and most everywhere inbetween... other than disconnecting my intercooler and fakin around under their to find where they tapped into i have little options..

other relevant information..
04 wrx
K&N typhoon intake
Greddy full 3 inch catback
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post #2 of 6 Old 01-29-2010, 03:00 PM
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Bet you it's under the TMIC.... Re-route it to the BPV..... It MIGHT still do the same things... It IS mechanical. Report back.

Paul
2002 WRX Sold
2007 WRX Sold
2007 STi totaled
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post #3 of 6 Old 01-29-2010, 03:04 PM Thread Starter
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Sorry im new to some of thease acronyms what does tmic stand fo?
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post #4 of 6 Old 01-29-2010, 03:27 PM
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That'd be your intercooler... Top Mount InterCooler.

-Chris
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post #5 of 6 Old 01-29-2010, 05:31 PM Thread Starter
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Aahh ha!! spun by the shop this afternoon talked to the guys and they were very confident that everything was hooked up perfect..and that i didnt have any boost leaks... so i took a gamble and replaced the gauge with an auto meter...problem solved and i'm clearly running about 14 psi!!

note: do NOT purchase cheap gauges!! they friggen blow!
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post #6 of 6 Old 01-29-2010, 07:59 PM
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I have one of those crappy gauges in my tool box. LOL

Brad

AEM CAI, Perrin ELH wrapped, Catted Downpipe, Stage II XPT tune, K4RT30Y STS, lip, shark fin
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