hi all,

so, i finally have an answer to my low boost problem..

the previous owner must have had a lambda sensor fail and when it was changed the whole head of the sensor was missing..and they didn't think to check where it went!..most of it made it through the turbo, the rest stayed inside, took out most of the inner part of the exhaust vanes.

i found the lambda pieces but didn't find any bits of the vanes in the down pipe so assume they went through the cat or are stuck in there.

the pieces look like most of a denso lambda sensor head and the one fitted 'looks' new.

my question is..is there anything else these bits of metal could be? any other sensors pre turbo on the exhaust side that could have failed and caused this?

I dont want to put my new turbo in and have the same problem :S

 

Cat in the uppipe could have broken up (wrx only) that's not uncommon!!

Harri

 

tis an STI UK, sports cat in down pipe, full ceramic manifold and up pipe.

note: the pieces found are 100% from a sensor..

piece i found


Denso lambda


im concerned it wasnt a lambda and something else.

 

Won't be that then lol!!!! There is a lambda in the collector part of the headers other than that there isn't anything else sensor wise!

Harri

 

good good

ok, any tips on how to get corroded bolts off the up pipe to manifold connection? lol they are crusty!

need to pull the whole exhaust system off to make sure there are no bits in there..

paying 680 quid to have my turbo core replaced and i dont want to have to do that again in a hurry lol.

 

http://www.ebay.co.uk/itm/Irwin-Bolt...item2a2c9c2b09

They are what you want!!

Harri

 

got some the other day lol

wont fit on the nut cos the flanges are too tight

think i'll just bust out the hacksaw on them