Scooby_Dan.

When I put my foot down in 1st somtimes 2nd gear the boost just seens o stop as though it's hitting some sort of limiter !! This has happened ever since I got a decat exhaust system. It's a MY95 WRX..

Anyone have a clue what it is & any possible cure

thanks

danny

scooby L

I remember someone saying that in 1st the boost is limited anyway.

The other problem could be overboost spiking. Common cure is to have a restrictor fitted.

Ask xtreme or scoobysport

Cheers

Kyle

Scooby_Dan.

Will a fuel cut deffender do any good ??

mr smash

just dome my 96 wrx decat and havent got this problem....do u have a knocklink /boost guage /lambda link fitted?

dowser

Decat is leading to higher boost, and you're hitting the fuel cut designed to protect the engine from too much boost...probably What boost level does it happen at?

Richard

Trem

iTrader: (3)

Sounds like the problem I had, appears to be an overboost issue. Mine started after I had had a decat and air filter put on. Answer is a Dawes boost controller I imagine. It really pissed me off as well.

Scooby_Dan.

Havn't got a boost gauge so I dont know what boost im running, Whay will a dawes do ??

Sorry for the questions , just wanna get this sorted !

Trem

iTrader: (3)

The Dawes will restrict the boost to an acceptable level.

Trem

iTrader: (3)

Bad choice of words, the Dawes will let you choose a level of boost that won't give you the overboost fuel cut......so I am lead to believe.

You could get a ScoobyECU but I'm not sure if they do it for your year of car.

scooby L

A restrictor will do the same thing (and it's £6)

But I'd recommend getting a boost gauge... to get the correct size.

(I bought a SECS in the end)

scooby L

sorry,

When I said it does the same thing, I mean it fools the ECU into thinking it's getting less boost than it is, so not shutting off the juice....

hense getting a boost gauge to monitor the true boost is a good idea.

Trem

iTrader: (3)

I get the jerky thing as well, Pavlo has helped me out, but say I still get it? Would a restrictor not make you lose any power then? Mine starts at 15 on my gauge (psi I guess).

big500

Dan you say it is like "hitting a limiter" well in my experience fuel cut feels more like hitting a brick wall.
If it is an overboost problem the car will be going like **** until the ecu starts to "fuel cut"
If it is an overboost problem check the vac/boost pipes for cracks and splits.
If you think the problem may be to do with the boost pack ( the plate on the o/s suspension turret which holds the boost solenoid , map sensor , ignition module etc ) I have a spare one which if compatible you can borrow bits off to try if it helps you.

Personally from the description it doesn't sound like fuel cut due to overboost to me IMHO

Steve

Scooby_Dan.

I dare say it's fuel cut mate as when you hit you jerk forward & end up head butting the wheel. Iv hit it about 120mph a few occasions too....

Trem

iTrader: (3)

Aye exactly the same here. Like whacking the brakes on. I have total confidence in the skill of Pavlo so I will see what happens.

big500

Dan,
Is the boost solenoid a 2 or 3 port ?
Have you had a re map after the decat ?
Is there a restrictor in the boost pipe still ?
Have you checked the boost pipes for leaks ?
Is the problem more pronounced on cold days ?


Steve

Delboy2

The JDM's have a 'cut' featured in the ecu to restrict speed. The scoobyecu will remove this and allow safer use on UK Optimax and SUL due to modified ignition/fuel maps. Oh and of course allowing increased boost too Speak nicely to David Wallis or Pavlo nicely for a scoobyecu (They are busy atm )
93-96 3 port solenoid.

[Edited by Delboy2 - 12/18/2003 8:48:53 PM]

Scooby_Dan.

Will do...

big500. I don't know the answers to your questions so I will have a look & let you know !!

Cheers

[Edited by Scooby_Dan. - 12/18/2003 9:15:01 PM]