russellgarwood4174

hi ive got a 2001 buy eye wrx wagon, ive been informed that a slight rattle when the engine is reved is my waste gate not closing properly! does this sound right? if so is it repairable? many thanks

FB Tuning

iTrader: (30)

If your internal wastegate is not closing properly, you won't acheive target boost.
What boost do you get on a WOT pull?

It may be the wastegate at fault, but in my experience the symptoms you describe are more likely to be the exhaust uppipe shields broken their welds on the pipe, and rattling about

Mrchips

iTrader: (7)

Could be your wastegate, had this on my td04 before. Kiddie who noticed it just did a turn on arm and was done.

russellgarwood4174

im going to sound like a twit now not sure what boost its pulling as its my 1st turbo car!!! in know the lambda sensor needs changing as it failed its emmissions! told to change sensor one! apart from that its a standard engine!! rattle seems to go when engine is put under load!! but when at higher revs then engine seems to pull then power goes and the engine revs rapidly! any ideas ??

FB Tuning

iTrader: (30)

It could be the wastegate, as you describe - The shaft that runs through the exhaust housing can sometimes crack.

Could also be the uppipe cat breaking up - I've seen this happen a few times, and it really rattles when the motor is free revved!

r1c

iTrader: (9)

as said above sounds like heatsheilds rattling, also if you have failed a emissions test get it checked out dont let anyone guess at a diagnosis, there are more likely causes than a sensor! can you post your emissions figures of the mot sheet!

russellgarwood4174

the sensor was picked up by a diagnositic machine! im based in germany and getting help repairing or fault finding is proving challenging!! is the waste gate repairable if it is at fault! the rattling is intermitant!! ive ordered a new sensor but postage takes anything from 4days to 2 weeks so frustrating being posted abroad!! are the heat sheilds easy to find to diagnois them myself?

r1c

iTrader: (9)

yeah you can get a screwdriver or similar to push against them to check.

just cos you have a code for a sensor, i presume maybe a lean mixture on sensor 1? that isnt a diagosis, just as long as you know, dont want you chucking away your cash!!

russellgarwood4174

fault came up as sensor one!! german guy said thats what i needed!! going to sound like a plonker know does the impreza have an external waste gate! am i getting confused with waste gates and dump valves or are they the same thing?? rattling is from rear left of engine bay around turbo, thanks for all the help so far by the way