All Things Mk5 > How to Guides / Troubleshooting

Lumpy idle, holding revs & hissing sound

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DM:
My wife's 2007 GTI has started idling really lumpy when warm, will sometimes randomly surge on revs, & when the engine is turned off I can here a hissing noise from the right hand side of the engine bay (As you look into the car standing at the front).

Any suggestions appreciated, as I'm a newbie here, more used to old aircooled VW's

shoaybmakda:
Have you tried getting it scanned to see what faults come up?

DM:
Will it show faults without and dash warning lights on?

ChazGTI:
Yes it will. There will almost definitely be faults registered given the symptoms described.

DM:
Cheers guys, will get it into my local garage

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