Rough Idle

[Ben]

Hi all ,

As some of you are aware I was on the hunt for a gc8 wrx . . . I finally found one! Very tidy , hasn\'t been mucked with too much , pics to come .

I\'m having one slight problem with the car - it drives perfectly well. However, when idling It sometimes has a miss , it\'s quite rough and shakes the whole car. Other times I will start it and there are no symptoms. The car doesn\'t idle hunt in any way.

The previous owner has said it has always done it . He supposedly changed the coils and spark plugs which has not changed the problem .

Any ideas ?

I have tried searching google but no definitive answer

Thanks

Ben

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[Marky]

Afm, intake leak, bov not sealing so well would be starting points

[Guest]

 Marky said:

Afm, intake leak, bov not sealing so well would be starting points

Leads and afm would be my first port of call.

What V* I have V5/6 leads you could try?

Does it do it when cold or hot or both? Just at idle or over the whole spectrum?

[Ben]

Hey all.

Appears only sometimes . It\'s a 50/50 chance of idling rough when you start it however if you bump the revs to 1000rpm it shakes the car , past this up to 2000rpm and onwards it is completely fine.

Boost is fine

Drives great.

I\'ve noticed sometimes when the car is hot it takes a few more seconds to start up and you almost have to give it a bit of gas to get it running .

Going to investigate more tomorrow . I was thinking something simple like a air leak? I\'ve also read a few posts on google about pcv valve getting blocked so have bought one of those although it looks like its in a bugger of a place to get at .