[BIG_KID]

2011 N52
I have a rough idle on start up for just a few seconds if the car sat for a few hours. No check engine light. Any advise is appreciated, thanks

[malicem3]

Could be a whole bunch of different things. Does it feel like a misfire?

[pokerface]

I recently changed my spark plugs and coil packs on our N20. Seems to have helped.

On a cold start, the car idles rough and has a stalling sensation if I put it in gear to roll it out of the garage within the first 30 s (if it's a bit warmer it won't do that).

After the plug and coil pack change this effect has disappeared

[BIG_KID]

Originally Posted by malicem3

Could be a whole bunch of different things. Does it feel like a misfire?

Kinda like a chugging, my first thought is a possible leaking injector then it clears up after a couple seconds.

When the car is parked after driving it a few minutes later I can hear some pressure release, possible fuel pressure release From the system, but I believe it is supposed to do that.

[Wgosma]

Need to scan for fault codes- this could even be as simple as bad tank of gas.
Good luck/Bill

[malicem3]

Originally Posted by BIG_KID

Kinda like a chugging, my first thought is a possible leaking injector then it clears up after a couple seconds.

When the car is parked after driving it a few minutes later I can hear some pressure release, possible fuel pressure release From the system, but I believe it is supposed to do that.

I just replaced a plug for the same issues. It started like this but then it evolved into a misfire. I was thinking injectors, aka worst case scenario, but it turned out there were not leaking. Replaced the plug and we were good.

[BIG_KID]

Plugs were changed 20k miles ago but will keep watching.
It's probably the very rear one

[malicem3]

Originally Posted by BIG_KID

Plugs were changed 20k miles ago but will keep watching.
It's probably the very rear one

I had just changed mine ~6,000 miles ago. Needless to say I was surprised one had went bad but I'll take it over the alternatives.

[htmaxpower]

Originally Posted by BIG_KID

2011 N52
I have a rough idle on start up for just a few seconds if the car sat for a few hours. No check engine light. Any advise is appreciated, thanks

I'm having the same symptoms with relatively new plugs and coilpacks. Did you ever diagnose the issue?