Strange boost (overboost) problem - EBC

[kotbehemot]

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.

[5e colin]

maybe the ebc solenoid is acting up ??

[mikey4410]

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.

[kotbehemot]

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 ;)