Hi everyone, I recently purchased a 2000 Legacy B4 Twin Turbo Manual Yesterday (22nd June 2013) it has 5 speed trans almost completely stock standard apart from a aluminum wrx top mount inter-cooler and HKS SSQV BOV, the chap that sold it to me also stated he replaced the factory ribbed turbo/inter-cooler piping with silicon tubing for better airflow... He also stated he had changed a few of the vacuum lines around to be the same as the 2003-20xx models, I wasnt sure what changes ? not a subaru techi.... Onto the problems I am having... The engine has randomly turned itself off 3 times in the 1 day I have been driving it, it seems to do it after being on boost and then coming up to a stop when you clutch in to stop I will notice the engine just shutting off and all the indication lights coming on as if reds were on.. the lights I noticed (Check engine, oil light, Steering lights ect) I simply put it into 2nd and clutched out to start again with no dramas.. it only seems to turn off at low speed when almost stopped or when clutch is in only... When I restart the car the "Steering" light above the temp gauge remains on, only when I pull over and turn the car all the way off and on does the steering light go away. Secondly I have a major I mean MAJOR brake shudder mostly only when braking at higher speeds, you can barely feel it under 70km/h and cant feel it at all under 50km/h but braking from 100 or over it shudders the steering wheel violently going about an inch left to right. also if I let go of the steering wheel the car will slowly drift off the the right... this worries me cause I hit a GIANT pot-hole on the way home with the car yesterday. the front left wheel went right in there making a huge CRASH! noise.. the rear left slightly went in on the edge but not as bad as front. could I have cracked a disk or wheel? Finally the boosting of the turbo seems really strange.. I will try my hardest to explain what its doing. when Im driving it usually starts boosting at 2000RPM getting to about 8PSI just before the second turbo kicks in at 4000rpm then it kicks down to 0 psi for a brief second while the second turbo is engaged and begins climbing back up where it gets to about 10PSI it doesnt seem to exceed 10 PSI with foot flat that lag period of no boost between first and second turbo is no more then 1 second... I believe this is how its all meant to be? then randomly with no warning at all the first turbo will boost all the way to 17PSI and when secondary engages it seems to lose its boost and real slowly start climbing back up to 17-18PSI. when the car is boosting 17PSI the lag between the two turbos seems to last 3-4 second where it feels boostless... what is causing my car to jump to 17PSI boost and then back down to 10 other times? I do not have a boost tap/controller.
Any help would be greatly appreciated, Cheers Trent.
