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Strange boost (overboost) problem - EBC


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Strange thing is happening when i am accelerating:


- 2nd gear / ~40 km/h


- then full acceleration


- boost gauge is showing steady 0.65 bar (not rising)


- ... suddenly ~0.9 bar and fuel cut


This "overboost" is not happening everytime.



Do anybody have idea why it can happen?


Where should i look for the reason of this situation?


Westgate or actuator is jamming??


Any suggestions will be appreciated.




Car spec (EP82 with 4E-FTE):


- standard CT9


- standard fuel pressure


- exhaust 2.5" with end muffler


- standard TMIC + standard DV (as blow off now)


- Apexi air filter mounted in front of the radiator


- EBC => MAC valve + piggyback DET3



Piggyback is controlling boost level (0.65 bar) and spark advance (up to 5 additional deg in highest rev).


It is not changing signal from ori MAP sensor.


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I have always had manual boost controllers with no issue at all

bought a brand new gizzmo for 200 quid and it kept overboosting, has put me off ever having another ebc.

im sticking with manual boost controllers now, I tryed all the different settings on that ebc and it was fucking wack.waste of money.

worst bit was I cant sell it as its useless.

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Theoretically ebc solenoid is new ... but who knows. I still have few months of warranty.


If i will have time, i will connect additional MAP sensor to vacum line that powers the actuator and check what is the pressure there while i have that overboost.


If i wont have time, i will just make a claim and let "them" to check it (or most probably change to new one).


thx




I still have my MBC but for me it was pain in the ...

I was not able to have the right setup for cold and warm weather, boost spike after gear drop was occurring, etc (planned boost level ~0.8 bar).

Thats why i have "invested" and bought EBC solenoid. It wasn't so expensive upgrade (~60 Euro), because my piggyback has 2 power outputs (up to 5A).

It would be a big waste if i wouldn't use those. I made simple map for it (work of solenoid depends from boost pressure and revs) and it is working ... almost perfectly ;)
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