GraSox

Hi guys,
Ive replaced my plugs and regulators but still notice a kind of "rumble " rough idle with a slight decrease in RPM's at idle sometimes.
Any ideas or has anyone else noticed this type of thing?
TIA

neanicu

It's hard to identify what you're describing over the internet...
I do suggest though disconnecting your MAF(Mass Air Flow sensor) and cleaning it with special CRC MAF cleaner. Let it dry for 10 min,then install and see if there's any improvement...
What are regulators BTW? Coils?

gpjli2

Do a search for "uneven idle" or the like here and on 6sp. You will either find your answer or be better able to describe your particular issue.

GraSox

It's for a 06 997 and yes the coils. Sorry

Spiffyjiff

disconnect MAF and see if it smooths out. if so, that's your problem - clean MAF. if not, probably coils and/or plugs.

snosk8luke

I'm having this exact same thing... ever get a solution?

larrytrk

Check oil cap and gas cap first.

groovzilla

Also wanted to mention that issues related to Bore Scoring or Cracked Cylinder can cause uneven idling.
Something not really discussed but 997S I wanted to buy a couple years ago had bad idle and was determined via Bore Scope Inspection had a cracked cylinder

Khloesdad

Try this: https://www.6speedonline.com/forums/...tle-reset.html
It worked for me.{Thanks Pete}

slicky rick

Clean your throttle body...

Bomba

Throttle body reset procedure via the key worked for me to sort this same issue. I did it yesterday and the car has been amazing since.