I have had the car 3 weeks my95 WRX import and just gone on the motorway with it for the 1st time. Im running Optimax with no Ron additives.
Something odd happend when crusing at 80 mph in 5th and the WOT the car picks up till it hits about 5250-5500 rpm and then its like a revlimiter cut in. It does this in third aswell as soon as it gets past 5000rpm towards 5500 it sonunds like a rev limiter cuts in.
At 1st I thought it might be overboost as I was WOT in third, so was waiting till a motorway drive to try again.
From the SDIC faq it sounds most like the wastegate problem but its a my95 import. Will reseting the CPU cure it???
Any advice welcome.

[Edited by Krade - 7/27/2002 8:26:01 PM]

has your car still got the top speed limiter...??? 110mph

I know you wont get 110 in third but could be something...

Dan

do you have a boost gauge, if so check what the boost level is doing

no boost gauge at mo :(
got it to 120 as was hitting the false limiter.

Krade,

Once u v hit 5500 does the boost pick up again?

Pete

if I kept my footdown then it would hit this false limit and then start to pick up again then hit the limit and so on. I tried it WOT and creeping up the revs but its the same result. I cant feel any signifcant increase in boost. Im gonna go and trey it again later this afternoon and hopefully Ill be able to explain better after that.

Its almost certainly still limited, you need to get a delimiter installed which is a mechanical fix on your car.

Bob

Krade,

Yeah I`m with Bob on this 1 m8 ;) Had the same prob (from what u described 2nd time) with my old MR2 turbo. It turned out to be a speed governor (which are fitted to all Japanese cars as standard)
Straight forward fix, mechanical speedo conversion as supplied by Falkland (among others) will solve it ;)

Pete

I can modify your ECU to fix speed limit, cost would be about £50 plus postage (ecu to me and back).

I don't know how this compares with a mechancial speedo fix pricewise

Paul

I went for another blast lastnight and got the car to 120mph+ by gently accelerating so no speedlimiter. I spoke to someone who reckons its deffinatly overboost and my lack of experience with turbo cars tends to make me think I've got my ideas about overboost all wrong and that the car needs a tune. So I may have got the wrong end of the overboost stick.

I must admit to being a bit annoyed that you cant really just floor the car, I have had a few sprints with some cars but when the car lurches in 3rd at 60 or 5th at 90+ coz of this overboost makes racing a bit of a challenge. Not that i do ;)

Thanks for all the help everyone theres just such a lot to learn about these great cars.

I am surprised it's overboosting at such high revs, as it usually occurs at around 4000rpm. As the engine speeds up it uses more air from the turbo, generally reducing boost on medium sized turbos.

If you have a boost gauge, make a note of the boost when it cuts out.

It could be a sticking boost solenoid as you first suspected, that will often give a very stuttery performance on boost.

Paul