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Old 05-08-2010, 02:11 AM   #1 (permalink)
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Defi Boost Gauge

Hey i just installed a defi boost gauge and from what its telling me im only boosting at 12 tapering off at 10.... now iono if it could be my meter or my car??? anybody have any idea what it could be??? i read other peoples post and i know it should be around 18 psi while mines reading 12....even though the car is running fine..

Thanks!!!
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Old 05-08-2010, 07:58 AM   #2 (permalink)
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did you buy your car used? does it have a boost controller on it? were there any mods before you bought the car? it sounds like your running off just the wastgate for the stock turbo. it could be if the car has a boost controller its not adjusted properly, or hooked up improperly. if the car was modded before its possible the stock boost solenoid is not hooked up properly causeing the wastgate to open at the normal 12psi. if you can get me a pic of the engine bay and a pic of the pressure line from the turbo to the solennoid and back to the wastegate i can help diagnose better.

Its also possible that your boost gauge is wrong. which defi are you using and where is it hooked up to for the pressure source? Also you could have a major boost leak but i dont think your car would idle right if it was that bad.
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Old 05-08-2010, 12:46 PM   #3 (permalink)
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Um the car is used when i bought it. There has been quite a few modes done to the car and i still have yet to figure everything thats been done to it.. i know that the person before probably had some gauges in it before but not sure theres no sign of a boost controller as far as i can see..
Is there a way i can fix the solenoid to.open up to its regular capacity? Im not 100% sure if he had a controller in beofre but if he did and took it off would it screw up the boost?
Its a defi red racer 52mm boost gauge

i hope the info helped a lil, i will attach photos when i get home
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Old 05-08-2010, 05:26 PM   #4 (permalink)
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the solenoid probably isnt bad but it is probably hooked up wrong. where is the boost gauge tapped into to? if it has a boost controller on it somewhere then it could be either hooked up wrong or turned all the way down.
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Old 05-08-2010, 09:39 PM   #5 (permalink)
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we tapped the boost gauge into the intake manifold, the guy might of had a boost controller before but he took it off when he lost the car...
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Old 05-09-2010, 06:30 AM   #6 (permalink)
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where at on the intake mani? is it inbetween the fuel pressure reg and the im? still need pics because i bet it wasn't hooked up right when he returned it to stock.
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Old 05-09-2010, 12:54 PM   #7 (permalink)
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Ill got pics but for some reason they wont let me upload them on here is there another place i can upload them to? Or can i email them to you??
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Old 05-09-2010, 08:26 PM   #8 (permalink)
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you can use a site liek photbucket or just email me at [email protected]
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Old 06-02-2010, 11:26 AM   #9 (permalink)
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Yeah man we need pics...I could possible be able to help..And are you sure there isn't a manual boost controller?


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