Idle revs erratic - occasional stall while idle

jlp123 · Post by **jlp123** » Fri May 12, 2017 2:49 pm

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 · Post by **vester86** » Fri May 12, 2017 3:23 pm

which fault code??

is the gas pedal doing anything when revving erratic?

jlp123 · Post by **jlp123** » Fri May 12, 2017 3:58 pm

How would I find the fault code?

Gas pedal isn't doing anything different

GreyZed · Post by **GreyZed** » Fri May 12, 2017 4:06 pm

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 · Post by **vester86** » Fri May 12, 2017 6:14 pm

jlp123 wrote: ↑Fri May 12, 2017 3:58 pm How would I find the fault code?

Gas pedal isn't doing anything different

With a OBD2 scanner or with the carly app

jlp123 · Post by **jlp123** » Fri May 12, 2017 7:44 pm

Ordered obd2 scanner

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