i give up, all of a sudden for the last 3 days things have been fine

ive changed nothing recently, not reset the ecu for a week and i put my foot down in 4th and it was doing the usual 8psi then all of a sudden, it was like a blockage cleared and wooooooo full boost

Mark

no sign of that happening i think it rough idles now as well

know it sounds funny.i had same symptoms with my scoob.
had slight oil leak from driver side cam cover which was dripping oil onto exhaust manifold.this oil smoke was then being sucked into my air filter and coating the maf sensor.no fault was showing and whenever it was checked it always drove fine
soon as i done gasket and cleaned off maf it was fine

did the above and its still not working properly no positive boost anymore!

:mad: my last resort is it booked into jap innovations!

what colur were the plugs u took out?
richie

Check your engines knock sensor, if it is knackered or you have a loose fitmentwhich is vibrating near it them that will make your car think you have det, retard your ignition, cutting back on the boost and making you think that the car is "Holding back " all the time. I have had this problem, and that is how I cured it, new knock sensor, its located down on the block in a horrible place behind piston 3 inlet.

interesting point on the knock sensor.
im getting a knocklink and sensor from the goupbuy on P1woc.co.uk
so we'll see what happens when i fit that.

interesting comment about the rocker gasket leak. mines due a service at the end of the month and thats on the jobs to do list.

Still there
 

Hi Guys
Haven't logged in for months so sorry to drag this up again - but are any of the above posted still getting boost problems? I still do but haven't pursued it much since it is so intermittent.... Just curious - thanks!

i used to have loads of problems like the people above so took it to scoobyClinic and they found the ECU was faulty. Since they changed it with a secondhand ecu the cars been fine, boosts to 13-14 psi everytime. before it would only go to 5-6psi then up to 12 then back to 6 etc etc.

Which ECU
 

Which ECU did you have? A standard one or was the car chipped (ScoobyECU/Possom etc?)

it was the standard chip that went faulty, Scoobyclinic replaced with an uprated one though. if you can get your hands on a replacement it might be worth a go at fixing your boost problems.

i have a '03 WRX, lost all boost, no ECU codes, car starts and runs smoothly but as if it has no turbo and no power. Any ideas? I'm enew to all things turbo or Subaru.
Thanks

xiw2155 did you manage to solve the problem with boost? :Whatever_

HA HA LOL i hear you brother!!!!!! Ive got the EXACT same problems!!! Spot on and ive already gone mad!!, I had a geezer in a mazda 626 or some sh*t do me at the lights!!, sayin that I let him go as I wasnt gona pop me engine for that ****. Ill get him next time.

Im gone try a new ECU. So if i find out ill let you know. Ive tried EVERYFU*KINGTHING And this is a last resort.

Good luck bro

swiftc or lack of!:mad:

hang in there m8!
 

Ive had similar problems. No.1 Have you got any error codes?
No. 2 If you DON'T have any error codes I suggest this.....replace the ECU or at least swap it with one you do know is in good working order b4 you go 2 any expense.

Ive just replaced mine and its fine I went thru all that sh*t m8!!!! I know!!
Im running a 93wrx. The ECU is located under the carpet on the passenger side under the plate. Easy. Be cool bro!!!

Swift:norty:

Never did solve my boost problem. Sold the car to Subaru tuner who replaced the management system completely but no idea if this solved the problem as I haven't heard back from him.

Hello m8, Ive had all these problems. Now....if you've got NO error codes showing and you are having the above problems (like i did) try changing the ECU. Thats what i did and it sorted it. Maybe swap with a mate before you splash. I got one off here for 50 squids. Result! Thats what i'd suggest.
I felt exactly the same.
swift c 93 wrx