Power Loss Any Thoughts

[fattb]

Evening Guys n Gals

Been feeling my Scoob's not been running that well just recently, just feels its not been giving full boost, Its UK 05 STi with PPP and Ecutek the only other mod is an STI panel filter which is about 5k old and have been using them for the last 20k, always serviced on time oil changed every 5k etc etc

Anyway was out having a little play tonight (private land of course) when i came across a 328i (shape before E46) and for the life of me i couldn't get away from him, i pulled into a petrol station and had a chat with the guy he said he'd done a few mods, but i guess you can't really do that much with a n/a BMW and if he'd gone done the FI route it would of simply left me for dead, maybe it was badged 328i but was an M3 evo

Anyhow i got back home and me not being a mechanically minded in anyway thought i would have a look under the bonnet, i checked the maf first which seemed clean (i did clean it a while back with a cotton wool bud not the best i know) then i checked pipes and hoses,

I don't really know what does what, but I have done a diagram with kids writing !

#1 Don't know what this pipe does but it was on fully yet popped off and on very easily

#2 Again don't know what this pipe does it was about 8mm off its seat underneath, but was definately not completely off

#3 the pipe leading to the DV was fully on but it was easy to pull off and put back on again

#4 had a small boost leak here before but was cured

Any thoughts ? faulty maf, maybe caused by me cleaning it (although the car ran fine after this)

Rather not go to a garage as money is tight, but if anyone has any obvious thoughts i would be pleased to hear them

Regards

Tony

Edited February 22, 2009 by fattb

[Big 'D']

Hi mate, you say it does not feel like it is giving you full boost, that may just be your problem, I am afraid that most of my knowledge is with the classic Impreza but this would be worth checking out, if your boost control solenoid is not working/cycling, it remains closed which allows your wastegate to open @ roughly 0.5 BAR (on the classic anyway) you will not get a Check Engine Light but your boost will be limited to 0.5 BAR, do you have a boost gauge?

Cheers Iain

[fattb]

Hi mate, you say it does not feel like it is giving you full boost, that may just be your problem, I am afraid that most of my knowledge is with the classic Impreza but this would be worth checking out, if your boost control solenoid is not working/cycling, it remains closed which allows your wastegate to open @ roughly 0.5 BAR (on the classic anyway) you will not get a Check Engine Light but your boost will be limited to 0.5 BAR, do you have a boost gauge?

Cheers Iain

Hmm feels like its giving a bit more than 0.5 bar but then i don't have a boost gauge , it just feels like its giving abit less than PPP did prior to Ecutek, I have checked and switched maps to make sure I'm not in the low boost map

Thanks for replying

[Big 'D']

Hmm feels like its giving a bit more than 0.5 bar but then i don't have a boost gauge , it just feels like its giving abit less than PPP did prior to Ecutek, I have checked and switched maps to make sure I'm not in the low boost map

Thanks for replying

Good luck with getting it sorted mate

If the solenoid is not cycling or lazy (was an issue on the classic which caused lumpy + slow boost responce due to oil vapour getting into the solenoid from the breather system) switching maps would have no effect to the output of the turbo.

Cheers Iain