Bogging and spuddering working like poop after 0 bar!!!!!! Helppp

[Chadbugden]

As soon as i hit outof the vac into boost the car works like total garbage and wants to shut off but if i leave it for a bit she will run in no boost fine what could it be just replace a turbo 2OOOk ago and this thing seems to be a lemon help pleaseee

[Skym]

Check for loose intake hose clamp on MAF or just behind MAF, as if MAF gets 2x airsources it can make engine stutter (as far as I know engine runs richer than it should), similar to coilpack making engine missfire. Sometimes it can be a crack in the hose under intake hose clamp or inbetween ribs that you don't see.

[Chadbugden]

I looked doesnt seem to be any cuts in it anywhere and i ran the codes and came up all clear she will make boost sometimes but then on the gear change shell spit and studder after 0 bar

[Skym]

Could be a reversion problem (turbo slowing down too much during gear changes thus air reverses direction and heads towards MAF, which upsets MAF, etc). Do you have at atmosphere vented BOV which can cause reversion problems??? Sometimes people mount MAF further away from turbo which helps to reduce this problem.

Do you have a clamp onto adaptor type of air filter???? If get too much air entering front of MAF it can make MAF max out at say 3000rpm and hit boost cut on ECU (fuel cut revlimiter). The other is a revlimiter at 2500rpm when ECU can't see MAF or have a faulty MAF.

If not those, could be sparkplug gaps (engine would miss at higher rpm only), faulty sparkplug tips due to damage when regapping them or coilpack is on the way out (engine starts misses intermittently, then later on it runs on 5 cylinders which causes missing throughout powerband, including idle).

[Chadbugden]

Ya i got straight forward filter to maf to turbo rubber hose nuthin fancy and the car is pretty well 100% stock And does seem to be high rpms but only after i giver then on the next accell shell get
On with her **** just replaced plugs 2000 ago wouldnt be a boost leak or turbo problem would
It cuz it smells
Like its burnin oil also im noticing a scratching sound
From my turbo at idle lately this car
Only has 47k and ive had so many problems already

[nimblestix]

Turbo is toast I think. Check the shaft for play by pulling of intake plumbing and wiggling the shaft.

First maybe free rev the car hard to about 4k or 5k rpm and listen for turbo rattling around.

Good luck!

Sent from a galaxy far, far, away.

[Chadbugden]

Ok so if my turbs toast what new turbo to buy for a fair price i wants to up the juice this time

[nimblestix]

if its a gtst i would go with an rb25 turbo @ 1bar , if its a gtr some gtss's or n1's are great upgrades.

[Skym]

When turbo fails, there is a whistling sound and then after a while a wacking sound. Should prelube turbo before starting engine by unplugging CAS, cranking engine until oil reaches turbo or prelubing turbo with oil before fitting to engine. Lack of oil is one of the quickest ways to damage turbo CHRA (centre part of turbo).

Check the turbo oil feed (top of turbo), as sometimes the washer there can make it leak and check the turbo oil drain gasket that can blow.

[Chadbugden]

Ya its a gtst but im over the whole buyin stock used turbo nuthin but junk im after blowing 3 already its a s2 and i really dont want to have to sell it but im sick and tired
Of loosing turbos i mean theres only 40 thousand klickssss on this bitch

[h4X6]

rebuild the turbo or get a holset http://www.holset.com/mainsite/files/

if you blow of of those, cheap to rebuild