ScoobyWagonLondon

Hi all.
I am new to the site and Subaru ownership I recently purchased a 2002 Impreza WRX Prodrive Wagon.
Cold the engine is perfectly smooth but in heavy traffic (London) the car develops a misfire at idle / low revs. The engine warning light came on once and the fault was cylinder 4 misfire I reset and although have had a heavy traffic misfire since have not had the warning return. I have changed the MAS ( Air flow Sensor) and cleaned the cam position sensor as a previous car had a similar fault that was the cause of but has not stopped it this time.
Anyone had similar problems they have resolved or any ideas.
I also need the rocker gaskets replacing if anyone knows a good garage
Thanks in advance for your help
Lloyd

Turbotasticdan

hi there

did you buy this off a guy in welwyn

ossett2k2

iTrader: (9)

If it was me my 1st job would be a service,new plugs ect

ScoobyWagonLondon

Yes

Turbotasticdan

i thought so i looked at this before i bought my wrx what did he come down to in the end if you dont mind me asking

ScoobyWagonLondon

2k not bad for a prodrive wagon I thought needs tidying and rocker gaskets but generally seems a good car

ScoobyWagonLondon

It's got new plugs so unless one is faulty that shouldn't be it.

Turbotasticdan

that not bad he had at 2200 when i was looking at it about a month ago bit of strange man

ossett2k2

iTrader: (9)

Gaped correctly?
also inspect the coil packs for any cracks.

scooberuni

Could be coil pack, I've replaced one on my 02 Scooby recently and it runs a lot better now. Used to misfire and hesitate quite a bit but changed coil pack, plugs and leads and it's fine.

ScottyPPP

Misfire at idle could be a sign of low compression in that cylinder.