I read in an article some where that Typical UK spec Impreza's have problems with over fueling and overBoost?...is this true?...if yes then How do I know that the car/s are affected and how do i rectify the problem?

you're help will be much appreciated

 

You know your car is overboosting when you appear to hit a wall while under hard acceleration. There is momentary loss of power than it comes back on again. It can be quite unnerving.
The most common cause of this seems to be oil contamination of the wastegate solenoid which you can clean out with brake cleaner. There may be other causes as well though.
Dunno about over fuelling though, I guess that means lots of flames if you've got a cat-less exhaust!

Stef.

 

thank's steph....

 

Overboost is where the engine has more boost than intended momentarily.

The fuel cut is part of the ECU which shuts down the engine momentarily when excess boost is detected. This safety limiter is there to prevent large amounts of boost damaging the engine and is set a fair bit higher than standard boost levels.

Overfuelling "or richness" is the ratio of air to fuel is too low (less air/more petrol) - limiting power and increasing fuel consumption. The only way this can be tested is at a specialist with professional equipment.

Thanks

Gavin

 

Munna,

Hi mate, how you doing, glad to see you've joined the Scoobynet community.

Sorry I didn't manage to keep up on Wednesday morning going through Carlisle but I was taking the parents to the station so I was in go slow mode.

DaveW

 

Driving normally then Dave,eh?

 

Mark,

You know me mate. Just cruise around, windows down, shades on, listening to my engine

Oh and sometimes I show people what 120 feels like coz their cars can't manage to go that fast

DaveW

 

Dave .....How are you man????....yeh wednesday....i was well late for work.....all these slow car's...they just would not move out of the way for me??....How is it going?....good I hope....just got into work now ...i am Absolutly shattered......Must go coffee is ready...Catch you later

 

Munna,

I know what you mean about slower cars, no respect eh The ones who really wind me up are those that sit right up behind you. Never mind I'm saving for the full decat exhaust to sort that problem out

Catch you later mate.

DaveW

 

Yeah Dave, can't manage 120. But anyone can drive fast on a straight road

 

Mark,

Ooooooo.... Touchy subject or what

DaveW

 

hey dude's...calm down now!!!!.....110mph....120mph.....come one chap's surely you can go a lot faster than that??....150mph....teetering onto 160mph....perhap's
how you keeping Dave??....must chat soon come to the restaurant......let me knoe the day??.....OK

 

Munna,

Check your e-mail mate

DaveW

 

The early Legacy Twin Turbos had a problem with the primary turbo overboosting when the exhaust was opened up..
Was a big power loss between the 2 turbos..

Un-nerving when driving and passing a truck or something large!