Idle revs erratic - occasional stall while idle

[jlp123]

Hi guys,

Had my 09 Coupe si for a couple of months. Revs started being erratic when idle. Pushing up to about 1300rpm then back down to 850ish. Occasionally stalls aswell.
Seems to be worse when I start car in morning.
Car has no issues when driving

Have done a bit of reading on the forum.
Seems it could be a dirty ICV or an issue with MAF.

Thought I'd consult your fine selves before I start tinkering this weekend. Anyone have any indication it could be something else malfunctioning?

Cheers

 

[vester86]

which fault code??

is the gas pedal doing anything when revving erratic?

 

[jlp123]

How would I find the fault code?

Gas pedal isn't doing anything different

 

[GreyZed]

Could be a coil pack.

I had an erratic idle once (occasional drop of at least cylinder on tickover but totally normal on the move) I replaced all 6 coil packs as I had been thinking about it anyway due to Zed reaching 12 years old and it solved my problem.

 

[vester86]

How would I find the fault code?

Gas pedal isn't doing anything different

With a OBD2 scanner or with the carly app

 

[jlp123]

Ordered obd2 scanner