Can't boost past 10psi...wastegate and vacuum lines ok!!
Apr 19, 2010, 12:14 PM
#36
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I had just had this same issue happen for the THIRD time ... first was a loose coupling @ the IC, second was a bad wastegate... just started again last night but I havent checked it out yet... I just replaced the wastegate 2 months ago... im not happy. Im betting its the wastegate again...Why would it go bad so fast ? Frustrating the hell outta me
Apr 19, 2010, 01:40 PM
#37
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I was a victim of this problem. I have a GReddy profec b-spec II EBC. No matter how I tuned it, it would not boost past 15psi. After checking out the GReddy install diagram, turns out I had the two vacuum lines off of the valve hooked up opposite. I dont work on my car enough, so I guess I gotta create my own problems. Its all better now though.
May 8, 2010, 09:28 PM
#40
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Guys, I have a similar problem, wont make more then 20psi doesn't hit that until 5100rpm and then falls off quickly. Apexi turbo kit. Is it the wastegate? I want to make sure before I start ripping it apart, it is a PITA on my setup.
May 9, 2010, 08:17 AM
#42
Easy Casper.. I have been reading this forum for close to a year trying to learn.. I have had no reason to post because well I know how to use the search button. But now that I am trying to buy parts I would like to post general questions, that others may have to the sellers. I appreciate the flame, gives me another reason to post!
May 9, 2010, 09:22 AM
#43
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to you guys who lost alot of boost pressure and cant boost like you used to, let me ask you one question...
do you have a catalytic converter ? on 25psi with intake, mbc, tune, stock exhaust, stock cat, i had the same issue... i dd a quick 4th gear pull in the car and heard a pop, i thought it was my IC pipe cuz i couldnt make past 7 psi immediately after, i brought it to the shop a few nights in a row trying to find the issue... we boost leak tested, held 20+ with ease, filled right up, so than we checked my TB seals and the were leaking, so i rebuilt it, no change... than my car started sounding like a subaru and ricky at top level felt the air coming outta my exhaust while i reved it and it was nooo good, told me i had a big clog... so within 2 days i bought myself a GReddy Ti-C Competition 80mm catless turbo back exhaust... when i took off the cat this is what i found
this was the thread i made
https://www.evolutionm.net/forums/ev...past-7psi.html
the signs i didnt notice before it went
- multiple cat efficiency code
- rattle in exhaust
- different exhaust note (like a subaru)
- car started getting more sluggish and spooling slower
- pop in the exhaust at WOT
- burning smell
hope this helps you guys !
do you have a catalytic converter ? on 25psi with intake, mbc, tune, stock exhaust, stock cat, i had the same issue... i dd a quick 4th gear pull in the car and heard a pop, i thought it was my IC pipe cuz i couldnt make past 7 psi immediately after, i brought it to the shop a few nights in a row trying to find the issue... we boost leak tested, held 20+ with ease, filled right up, so than we checked my TB seals and the were leaking, so i rebuilt it, no change... than my car started sounding like a subaru and ricky at top level felt the air coming outta my exhaust while i reved it and it was nooo good, told me i had a big clog... so within 2 days i bought myself a GReddy Ti-C Competition 80mm catless turbo back exhaust... when i took off the cat this is what i found
this was the thread i made
https://www.evolutionm.net/forums/ev...past-7psi.html
the signs i didnt notice before it went
- multiple cat efficiency code
- rattle in exhaust
- different exhaust note (like a subaru)
- car started getting more sluggish and spooling slower
- pop in the exhaust at WOT
- burning smell
hope this helps you guys !
May 17, 2010, 11:03 PM
#44
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Easy Casper.. I have been reading this forum for close to a year trying to learn.. I have had no reason to post because well I know how to use the search button. But now that I am trying to buy parts I would like to post general questions, that others may have to the sellers. I appreciate the flame, gives me another reason to post!
my bad, just seen so many similar complaints lately, its getting annoying.
May 17, 2010, 11:06 PM
#45
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to you guys who lost alot of boost pressure and cant boost like you used to, let me ask you one question...
do you have a catalytic converter ? on 25psi with intake, mbc, tune, stock exhaust, stock cat, i had the same issue... i dd a quick 4th gear pull in the car and heard a pop, i thought it was my IC pipe cuz i couldnt make past 7 psi immediately after, i brought it to the shop a few nights in a row trying to find the issue... we boost leak tested, held 20+ with ease, filled right up, so than we checked my TB seals and the were leaking, so i rebuilt it, no change... than my car started sounding like a subaru and ricky at top level felt the air coming outta my exhaust while i reved it and it was nooo good, told me i had a big clog... so within 2 days i bought myself a GReddy Ti-C Competition 80mm catless turbo back exhaust... when i took off the cat this is what i found
this was the thread i made
https://www.evolutionm.net/forums/ev...past-7psi.html
the signs i didnt notice before it went
- multiple cat efficiency code
- rattle in exhaust
- different exhaust note (like a subaru)
- car started getting more sluggish and spooling slower
- pop in the exhaust at WOT
- burning smell
hope this helps you guys !
do you have a catalytic converter ? on 25psi with intake, mbc, tune, stock exhaust, stock cat, i had the same issue... i dd a quick 4th gear pull in the car and heard a pop, i thought it was my IC pipe cuz i couldnt make past 7 psi immediately after, i brought it to the shop a few nights in a row trying to find the issue... we boost leak tested, held 20+ with ease, filled right up, so than we checked my TB seals and the were leaking, so i rebuilt it, no change... than my car started sounding like a subaru and ricky at top level felt the air coming outta my exhaust while i reved it and it was nooo good, told me i had a big clog... so within 2 days i bought myself a GReddy Ti-C Competition 80mm catless turbo back exhaust... when i took off the cat this is what i found
this was the thread i made
https://www.evolutionm.net/forums/ev...past-7psi.html
the signs i didnt notice before it went
- multiple cat efficiency code
- rattle in exhaust
- different exhaust note (like a subaru)
- car started getting more sluggish and spooling slower
- pop in the exhaust at WOT
- burning smell
hope this helps you guys !