As said in the title im a soldier out in germany and have a subaru impreza wrx 1992 jap import. im just about to set the dam thing on fire and jump in lol so any help would be great

Right here goes i bought the car about a week before i was due to fly to iraq about a year ago,on the way home the thing went **** up, i think it possibly conrod came away from the crankshaft not a 100% certain but it did sound very rough


a friend was down at the ring smashed his car(rear end) also jap inport version one so had stu 71/200 help me pull the engine and swap while engine was out swapped my turbo off the doner car also the inlet as his had 440 and i belive mine were 380s once put back together car did not boost well so asumed it was turbo as it was a little stiff bought one second hand off fleabay fitted and had the exact same problem so fitted a boost gauge was only showing 0.5 bar checked for restrictor pill and found ther was not one fitted

also tried an new boost solinoid still nothing so set about replacing gasgets (inlet also gasgets from manifold back to the turbo downpipe)
still nothing still nothing while i had the manifold off i fitted a oil catch can and carried out parrallel fuel lines still using the standard fpr, sourced a restrictor pill and car seems to boost a little better,if i push the car hard it will give me just under a bar of boost but will spool up very late nothing like the animal it used to be for that hole day i had it working fine 1 bar by about 6000 rpm

what i have just recently found out if im driving about say 60 mph in 5 the then floor it will spool up nice and early as if there is enough pressure or somthing then ill drop down to 4th and it will still boost well for a bit the after a short while it will just go back to spooling up very late also done ecu reset checked for faults but none stored

if any one has any ideas or needs more info ill do my best to get it to them asap


hope to hear from yous soon
steven (batmanwrx)

 

anybody

 

hi mate this thread might be of use https://www.scoobynet.com/general-te...krpm-help.html

 

iv had a good look at that post in the past been through it and also tryed pretty much all the same but still no joy was thinking of trying a mbc just to see if much diffrence not really a ideal saloution if it works as im not solving my problem

 

You meantion about changing the 380s to 440s, have you had it mapped to suit.

 

no the manifold that came off my mates car had 440s so i swapped it for my manifold with the 380s as thats my car runs standard on a u8

 

The standard boost on yours is 0.8-0.9 bar.
I can't quite understand what you are saying 'nothing like the animal it used to be for that hole day i had it working fine 1 bar by about 6000 rpm' Thats late. How much later than that is it hitting full boost now??? Rev limiter @7-7.5k!

My MY93 WRX is full boost (17psi c.1.2bar) at under 4k rpm.

What up-pipe do you have? as a large bore or leaking one will slow down spool up time.

 

b13bat hows you mate

what i was saying now i dont get 0.9 bar of boost before about 6 k shoots up to start with then sticks at 0.5 for a bit then slowly creeps up as i push it harder

when i was talking about the before i was meaning when i got the car the first day i owned it before engine went **** up

quote:
My MY93 WRX is full boost (17psi c.1.2bar) at under 4k rpm.

What up-pipe do you have? as a large bore or leaking one will slow down spool up time.

i wish

 

Yeah doin fine mate

On the pic below you have the middle of the 3 ports labled 'top of bcs' it should be to Pressure Exchange Solenoid, see 2nd pic. (don't know if thats what you mean??)

Taking the boost gauge off the DV is not a good either. Take the DV straight to the manifold and tee the gauge from the middle port going to the PES.

Also 'if' the 'whats this for' tee piece is free (as it appears) lose it and connect the clear pipe direct to manifold.



http://i624.photobucket.com/albums/t...0265scooby.jpg

Heres my manifold



Red to DV
Blue to blue, a short hard pipe
Green to Pressure exchange solenoid (in next pic, green)(also tee'd off to boost gauge)



Hope this helps.

 

i changed all that a while ago b13bat the pipe coming off the throtle body does that pipe go to the fuel pres reg

 

is tghat you have a dawes device lurking away there

 

I think so yes, not had a lot to do with the fpr yet, aint broke dont fix


Yes its a Dawes, got a Polar Perfomance chip fitted and have the Dawes set to 17psi, aslo helps spool up

 

iv been thinking about a dawes device to try sort out this problem could you explain to me how they work cheers ,steve

 

You could try one but it will not solve your issues, just mask it

Simple to fit and use, it basically replaces the OE BCS, it aids spool up as it doesn't let any pressure past to the wastegate and hence illiminates creep.

Can be had direct from Darren Dawes at Hybrid Boost Controller

If used properly/safely they are a good mod

 

i know dont want to just mask it cos then im cheating but running out of ideas..... if my car was over or underfueling how would i could this cos boost issues

 

i pulled the actuator pipe off and it was boosting good just took it nice an easy mind you

 

So that rules out the turbo and the gauge then, i had to do the same when i first got mine, ended up removing the BCS and soaking it in hot soapy water which sorted it, my next move would of been the wastegate

 

Talkin of fuel, what do you use??

Over/under fuelling would cause issues but i doubt it would give symtoms you are seeing

 

iv had 2 diffrent turbos on it with still the same results so i hope that can rule out the actuator also used a manual pump with with gauge and kinda checked the actuator opening fully opened about 1 bar

 

So, turbo, wastegate and gauge ruled out

That leaves pipes and hoses and the BCS then.

It only takes a small split/hole in a vac/boost pipe or a insecure end to lose boost so go over them all including looking for blockages, i replaced all my smaller ones.

If you connect the test wires under the dash does the BCS click continually??

I know this is prob old ground but i feel its worth re checking

 

mate i do this about once a week lol(test wires) iv checked checked and ckecked again i had the intercooler of last week checking that over took off the hard pipe resealed it where it conects to the intercooler but still nothing iv changed most of the pipes aswell

 

Once a week, are you OCD

Mate i'm ****'d if i know then

Tried a ECU reset lately

 

the thing is it boosts fine somtimes and the rest of the time it does not feel as good

yeah done one the other day

 

does it happen hot or cold???

 

well id have to say hot because i will not go on boost while its cold

 

It could be the cat (if you have one fitted) as the cat gets hot, the metals inside it expand and cause a blockage in the exhaust, engine cant breathe-cant produce boost.

 

i daont have a cat fitted rookymat if there was a blockage with the breather system it would not boost correct with the actuator pipe removed but it does hmmm

 

hmmm indeed! no, blockages, good airflow to and out of the engine, good turbo, wastegate. Theres nothing left! unless something is over looked! then its back to the drawing board.

 

Try one

What you got to lose. I say if it solves the problems then its down to the BCS

 

tried a working maf,full bcs and presure valve the thing on top of the bcs also tried a new dump valve but still the same reset the ecu boosted fine a couple of times then back to low o.5 then slow spool up grrrrrrr