Postman Pat

99 UK Turbo. Has a slight misfire. Been into garage and a bit of troubleshooting was done with the result that nothing seems wildly off. IIRC the ECU was read for faults, fuel pressure,compression and injectors were looked at. Garage is a respected rally outfit which specialise in Subaru and before they started made me fully aware that it could take 5 mins or 5 days or maybe never to sort. Misfire isn't very bad just annoying. Bit lumpy on part throttle particularly when cold and doesn't pull quite as well as it should.

However I changed the coil pack a couple of years ago to get rid of a misfire then. I still have it so swapped packs to see if it made any difference and it does I think (misfire is slightly different in character). So I think its either a pack or maybe the HT leads.

Question is do these coil packs (and its the central single pack) fail regularly. Car has done 130,000. Unless somebody can help I'll probably change the HT leads first and then coil pack if necessary.

Thanks Pat

WUZ

iTrader: (14)

Poor earthing points?

Clean up all the Earthing points and you will notice a diffference.

Russell

Postman Pat

Tks for the suggestion Russell. Done already and I have an earth kit in as well.

Pat

dazdavies

iTrader: (22)

The packs can tire with age. I had a misfire issue couple of years back.
Have you made sure the cam and Crank sensors? Mine was caused by a blob of grease on the crank sensor. It would only become an issue after a hard run and things got hot.

Things to check, leads, plugs and plug gaps, earthing points. We even went as far as running and extra earth lead from the ECU case to the body work. This was before we found the blob of grease.

Daz

Postman Pat

Yeah I think I have most of the culprits covered but will give it another once over if I get a dry day. I just didn't want to unnecessarily start adding bits and running up a large bill on guesses. The garage has checked all it could through the computer plus a few other things so I know basically the engine is ok. I just don't like the car not running perfect. I'm nearly sure its either the coil pack or HT leads (however garage maintained that they if faulty would have shown up on their tests)

Coil pack and leads were changed 50,000 miles/5 yrs ago. MAF was also changed within last 6 months as was the lambda.

Pat

sy.

iTrader: (8)

have a read of my post in this thread....
https://www.scoobynet.com/general-te...ull-boost.html

Postman Pat

Thanks sy I'll give the HT leads a go

Pat