overboost protection problem

[Chris5044]

anyone know whats wrong with my car!

overboost protection keeeps kicking in...

have cleaned maf and air filter....

under bonnect my car also has something drilled into it heres a pic

do i need to replace dv? boost leak? dunno?...

pls help

[S2central.net]

Prolly an air leak... Easy to say - harder to find sometimes......

[Chris5044]

k thanks... gonna buy a dv.... and do a pressure test... anyone got the kit for this that lives near me? i live in hertfordshire

ps: whats that drilled thing for ?

[S2 Ant]

That drilled part is where the thread to screw down the Wastegate spring is, by screwing it down i believe you gain greater mechanical boost, its not something to be tampered with unless you know what you're doing.

I would also def pressure test your car, thats the first thing i would have done, even before cleaning the MAF etc.

[Chris5044]

its now boosting again??? wtf???

gonna research into this will give feedback on this

[Paul Snip]

You can try turning the bolt a little out. 1 or 2 turns maybe enough.

Probably they drilled the hole to turn the bolt in, to make the turbo pressure higher. As this is regulated by the ECU this makes no sense.

Also my advise will be; try screwing de bolt al little back.

If you want to set it back to the factory standard, you have to disconnect the WGFV connector. The boost hould be around 0,4 bar then.

I solved my overboost problem by turning de bolt a little back.

Cleaning the Wastegate Frequency Valve may also help solving the problem.

[Armo750]

Erm,
Common problem with S2's the more I talk to people.
Mine can be the same but only some times !!!
I have checked for boost leak, no.
Changes WGFV.
Changed dump valve (only because I was changing WGFV and it's in the same area and can't hurt !)
Changed hall sender (on the way out anyway as sometines wouldn't start)
Changed pluds & oil & filter.
Cleaned MAF.
Changed MAF to known OK one !
Pulled codes and checked faults.
Anyway it hasn't happened for ages and now I have posted this you can bet your bottom dollar that tomorrow the problem will pop it's ugly head up !
Does anybody know the REAL cause ???
Regards,
Paul.

[Chris5044]

problem found

found my boost leak problem... and have temporarly rectified it

it was a quite obvious split in a hose...

ps anyone got a spare one of these? samco preferred

[s2avant95M]

Their is a group buy for samco hoses, i would get in on that if i were you.