wikid11

g'day people, just cannot find a reason for the stutter between 4 to 5000 revs under boost,have checked all info and tryed it all but no change have had the car into so many different garages they cant find the fauit,no error codes,no lose hoses can anyone please help ,starting to think subarus are just not worth the hassle

bluerigster

iTrader: (9)

Try checking your spark plug gaps are set to 0.6mm, otherwise the spark escapes out of the side of the gap if too far apart. This usually happens when intially coming onto full boost.

RLE

iTrader: (2)

Have you got an aftermarket dump valve fitted. Sounds very similar to a problem I had with my Classic a few years ago. Turned out to be a faulty spring.........put on the oem plastic dump valve and the car was sorted.

GC8

Is it an early car running coil-packs?

wikid11

yeah thers a hks blow bov on the car and it has a single coil pack on the top of the motor

andy_s37

I'm told that if its got too much oil in it you get a boost cut due to the over-pressuring. That feels more like a drastic engine cut though.

Andy.

pimmo2000

iTrader: (6)

I'm getting the sane problem, but it feels also like my clutch is slipping... waiting for problem number 3

wikid11

hi, have only filled oil to half way and was doing it after that, have just taken the bov off and given it a good clean[sounds different now] but still happining

Phil555

iTrader: (1)

MY00 classic used to do it. Turned out to be the MAF sensor.

Phil.

jjones

https://www.scoobynet.com/general-te...nder-load.html

was plugs in this case

dn12345

mate,

I had exactly the same thing. It was a stuttering sensation - quiet violent at times. Subaru tried replacing the plugs, the air filter, cleaned the wastegate solenoid the lot - and to no avail.

Took it to scoobyclinic and they diagnosed it within seconds..... COILPACKS. These things are fairly costly but the difference made was unreal and trust me, you'll love your scoob again!

Tidgy

can you get it on a dyno?

wikid11

cant get it on a dyno for 3 weeks have tried everything but changing the coil pack ,am going to change it next week, hopefully that works