Boost issue
Aug 24, 2011, 01:15 PM
#18
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oh my bad. i have a high flow cat. the car pulls alot harder but gauge still not reading anything past 15psi. is my gauge not working or my MBC is acting up? i cant figure it out!
Aug 25, 2011, 10:10 AM
#21
I know it sounds crazy but take off your cat and check to see if the honeycomb is in place and not blocking your exhaust flow. Do you or one of ya buds have a test pipe you can use? Ewwww you got an MBC who's is it? Also do you have evoscan... you may be able to plug in a do some pulls to see what your ECU is seeing your car doing vs. flip flopping your gauge. I mean if your car is down to 15PSI from 22 and you already said it's running like ****, I am pretty sure the lack of boost your feeling is REAL and it's not your gauge ***ing with ya.
Wait where in FL are you that you got NO EVO Support???
Wait where in FL are you that you got NO EVO Support???
Aug 25, 2011, 10:30 AM
#22
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I know it sounds crazy but take off your cat and check to see if the honeycomb is in place and not blocking your exhaust flow. Do you or one of ya buds have a test pipe you can use? Ewwww you got an MBC who's is it? Also do you have evoscan... you may be able to plug in a do some pulls to see what your ECU is seeing your car doing vs. flip flopping your gauge. I mean if your car is down to 15PSI from 22 and you already said it's running like ****, I am pretty sure the lack of boost your feeling is REAL and it's not your gauge ***ing with ya.
Wait where in FL are you that you got NO EVO Support???
Wait where in FL are you that you got NO EVO Support???
Have you tried to up the boost using a 3-port grimmspeed? It's not nearly as easy as turning a knob to up the boost.
-Bink
Aug 25, 2011, 02:02 PM
#23
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i have hallman MBC. well after i fixed the leak around my LICP, its pulling much harder now and idle pretty normal. im suspecting my Greddy RS is leaking on me. does anyone has their BOV leak and not boosting above 15 psi?
Aug 25, 2011, 02:26 PM
#24
. And there are just as many fast cars that are on 4bar MAP sensors and speed density that don't use them. When I used to track my car and do time attack yeah I used an MBC then until I realized it was easier just to have a track map, and a dd map. Once I did that then there was no boost creep because it's was raining or lack there of because it was too ****in hot on the tarmac etc. And when I crossed over beyond that and had different maps for all out 91 and all out E85 I gave Greddy's EBC a try, but being that I was no longer tracking the car and the maps were for all out boost... once again I didn't need it. And now that I'm on dual maps with the flip on my intercooler switch with Tephra Mod7 well u know... 
Aug 25, 2011, 02:33 PM
#26
You still on the stock manifold? Check for leaks before the turbo. I had three of the smallest cracks in my manifold and it wouldn boost part 15 and it progressively got worse and worse. Also check for exhaust leaks around the head to manifold, manifold to turbo a blown gasket would cause this as well.
Aug 25, 2011, 08:00 PM
#27
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kay, i will check that when im off on Sunday. im so damn frustrated with this boost issue. thanks alot to everybody that gave me inputs on the issue. i update more info if anything changes
