PDA

View Full Version : Major Boost Creep issue...already searched...

Omega47
10-21-2006, 02:46 PM
Hey all...Ill just get to the point. I Have a s13 Redtop Sr20det with the stock t25. I just recently as in 1 day ago replaced the stock exhaust system with a Megan racing Exhaust manifold, Megan O2 Dumpipe,Megan Flex downpipe and a megan catback on a Mckinney Motorsports testpipe. Well hooked it all back up went out for a drive and got on it...not good. As soon as i mashed it BAM 17 PSI slap. So me being scared shitless for my motor i took it easy and just troubleshooted. A friend who worked with top secret and yashio drove my car. We got on it... bam 16psi,but then he got on it and held the boost at 10 psi till 5k and then mashed it....it stayed where my MBC (Manual Boost Controller) was set 11 1/2. He is now as stumped as i am. I need to know what i need to do or what equipment i need (AVCR for example) to stop this. Please help i searched and searched to find no answers. :smash:
punxva
10-21-2006, 03:27 PM
its probably the mbc, they arent really the most effective way to control your boost. Also did you make sure to hook it back up exactually they way you did before?
Omega47
10-21-2006, 04:04 PM
Yes of course i did. Already checked that. I can post a pic of my setup as is atm if it helps.
Omega47
10-21-2006, 07:08 PM
*BUMP* need help bad guys.
SRd240sx
10-21-2006, 07:32 PM
hmmm that's odd.

i ran into a similar problem as yours....sorta. i made a home depot MBC but the spring was no good so it shot up to 17psi right away. i threw that $4 pos away and got a better MBC. it was fine after that
SRd240sx
10-21-2006, 07:58 PM
oh yeah, i'm not saying it's your MBC because it doesn't look like you did anything to it... but the symptoms are as if the MBC is faulty.

so maybe try hooking up the vacuum straight to wastegate and don't use an MBC for now and it should boost 6psi and have no problems.
Omega47
10-22-2006, 02:18 AM
i unhooked the wastegate completely and left it open where it shouldnt boost almost at all and it still does it.
aNskY
10-22-2006, 09:32 AM
i unhooked the wastegate completely and left it open where it shouldnt boost almost at all and it still does it.


:duh: :duh: :duh: :duh: :duh:
Omega47
10-22-2006, 01:47 PM
Still looking for solutions...anyone?
Omega47
10-23-2006, 03:11 AM
Still need help,out of ideas,i ran straight wastegate no control,just open and still has the problem. Also opened the MBC all the way and still does it.
Omega47
10-23-2006, 11:36 PM
It was the MBC ty to SRd240sx and punxva for your time and input,greatly appreciated.
sikS1LVIA
10-24-2006, 12:26 AM
cool cool cool alsways good to see someone fix their problems