First of all, the cars a 1994 impreza wrx sti import.

I got her back last night and I couldn't be happier. I took it for a nice long drive, about 50 odd miles in all, just to make sure she was running sweet and she was. The only thing I noticed was that it was coming into boost quite last.

It would start boosting at around 5 psi at 3500 RPM but the only time it would reach full boost, approx 14/15 psi was from about 5500 RPM onwards.

Surely that cant be right ?

 

sounds VERY late
why did you 'get it back' ?....whats been hapening to it?

 

It need some essential maintenance, i.e. a new engine !

Its been off the road for about a month now.

 

Anyone got any suggestions ?

Im going to clean the boost solenoid and MAF tonight, see if that helps atall.

 

sounds like a boost leak somewhere

 

Any idea where i should start looking ?

 

Has the ECU been reset after the previous engine issues ?

 

Im pretty sure the battery was taken out and left out for a good month, would that have reset the ECU ?

 

yes it does but i just reset mine there is plenty posts on here how to do i

 

Doesnt the ECU sort itself out after a couple of miles though.

Drove it to work this morning and its still doing the same, not reaching full boost until after 4k atleast.

This is driving me insane now.

Someone suggested that maybe the actuator needs adjusting ?

 

resetting ecu will only reset fuel trims.

check tension on actuator.

check all asociated boost hoses for leaks.

try a bleed valve/dawes device on it.

.....a few things for you to try.

 

Ok will have a look on this coming weekend.

Just a quick one, I started it up this morning to listen to the boost solenoid and on the very slightest rev it'll make a rapid ticking noise, is this supposed to happen ?

 

Damien,
The ticking is normal as far as i can ascertain from my own experience and from what i have read.

 

Also, you might be aware of this, you wont hit 14/15 psi in first. Does the boost pick up faster in 2nd and 3rd gear while the engine has load?

 

I never boost it in 1st anyway.

In 2nd and 3rd it'll hit 10 PSI ok'ish but then as soon as it hits 5500 RPM it'll fly up to 15.

I'll monitor it abit better next time I take it for a hard drive.

 

Referring to this picture;



Where should the bottom pipe go to if the induction box has been replaced with a cone filter ?

 

It's just left hanging free in the bay (doesn't matter).