20 psi!?

[XxSiRhCy6PxX]

ok this is my problem. i installed my uicp with a 1g bov this morning, took it for a test drive too see if my boost changed cuz of the bov and YES it did i was boosting fine at 14 psi with my stock bov and now im boosting 20?! what could be the deal here? my knob is practically out of my joe p mbc and still didnt change? any ideas to why its spiking that high? i notice that the 1g bov was harder to push open then my stock bov. probably 2 times harder. took me some muscle just to make it budget. could that be the case?


thanks..

 

[CanadianTSi]

Your MBC is probably installed wrong or needs to be adjusted more.

 

[DevilSperm]

AND the 2g one was probably leaking that much

 

[XxSiRhCy6PxX]

ive searched and searched and yes i installed my mbc right. teed off to the bov and conected straight to the acuator. closed all the openings.

 

[DevilSperm]

try going back to stock and see what that does

 

[mitsuclipsegsx]

what mbc do u have i have the turbo xs and u can't use a t line

 

[kraka]

Boost Leak Test! Check all connections!

 

[XxSiRhCy6PxX]

a leak would cause more boost?

 

[XxSiRhCy6PxX]

should i try cutting the spring? if so, how much ?

 

[CanadianTSi]

Just run a hose from a pressure source (BOV line) Directly to the Wastegate and see how much boost you have.

 

[XxSiRhCy6PxX]

im just gonna try cutting the spring. ill tell ya guys how it goes..

 

[adidas5482]

Turn the mbc's knob all the way in then test.

 

[DevilSperm]

cut the spring? dude did you even try to take the mbc out and see what happens? that would eliminate the possibility of it being the mbc if it still did it..or pinpoint the problem

 

[XxSiRhCy6PxX]

ok i took out the mbc and gave it a test run.. still the same.. :thumbdown what do to next?

 

[DevilSperm]

well, i would guess that since you arent leaking out of your bov now, its boost creep due to your 3" exhaust...you know that your mbc is fine now...time to port

 

[XxSiRhCy6PxX]

i thought boost creep slowly rises? and mines just shoots up to 20. i guess i gotta port..

 

[CanadianTSi]

If you ran a hose straigth to the Wastegate that should make it open at the spring pressure 10ish psi, but if it shot to 20 then that means that your wastegate isn't opening.

 

[XxSiRhCy6PxX]

it was working fine till i installed my bov and uicp today. what could have gone wrong?.. how do you know if the bov is toast?

 

[CanadianTSi]

Your BOV has nothing to do with controlling boost. If your turbo just shoots straigth to 20psi then something is wrong with your MBC somewhere.

 

['98 AWD DSM]

Disconnect your MBC and run a line from the pressure source on the compressor housing to the wastegate and it should open around 10 pounds. If not then there is a problem with your gate, although it may open at 12 or so becuase of creep and your mods. Lt us know what happens.

 

[XxSiRhCy6PxX]

[QUOTE='98 AWD DSM]Disconnect your MBC and run a line from the pressure source on the compressor housing to the wastegate and it should open around 10 pounds. If not then there is a problem with your gate, although it may open at 12 or so becuase of creep and your mods. Lt us know what happens.[/QUOTE]


OK i disconnected my mbc and replaced it with a single hose going to the WG. I gave it a test run and its hitting 17 psi. Something is wrong huh? or maybe i hooked it up wrong. ok this is how i hooked it up. i took off my mbc from the T and in replace for the mbc, i hooked up a hose that leads to the WG. did i do it right? ahh.. this stuff is killing me

 

['98 AWD DSM]

XxSiRhCy6PxX I tried IMing you, but what pressure source is it hooked up to. Just run a line strait from the fitting off the compressor housing on the turbo to the wastegate. A friend of mine had a similiar problem, but we solved it by doing the above until he got an electronic boost controller. With my friend we had pulled the boost restrictor soleniod so that is why it was spiking that high, so his story is a little different. So just run a strait line from the compressor housing to the wastegate and see what happens. Let us know what goes on.

 

[XxSiRhCy6PxX]

[QUOTE='98 AWD DSM]XxSiRhCy6PxX I tried IMing you, but what pressure source is it hooked up to. Just run a line strait from the fitting off the compressor housing on the turbo to the wastegate. A friend of mine had a similiar problem, but we solved it by doing the above until he got an electronic boost controller. With my friend we had pulled the boost restrictor soleniod so that is why it was spiking that high, so his story is a little different. So just run a strait line from the compressor housing to the wastegate and see what happens. Let us know what goes on.[/QUOTE]


Arighty, i did what you told me to, run a straight line from the compressor housing on the turbo tot he wastegate and it spikes to 20 psi.. :thumbdown deng i guess that sounds bad for me..

 

[XxSiRhCy6PxX]

:thumbdown

 

[XxSiRhCy6PxX]

if my wastegate is stuck open can i do something to fix it?