mr58

Has anyone else experienced a rough idle? It's especially pronounced when I look at the passenger seat shaking. If I give it a little gas in neutral (about 1000 rpm) it appears to go away. Is this normal for a C2 (the car has less than 5k miles)?

Also, when shutting down the engine, the engine turns off quickly, but I hear what can best be described as a pop noise from the back (engine I believe). Has anyone else heard this?

Thanks in advance.

duxsi

At what rpm does the car idle when warm?
Has it always done this?
What fuel to do you use? (Has anything changed recently?)
Any one looked at the TPS or any fault codes recorded.

mr58

It idles at around 700 when warm.

mr58

Forgot to mention that it has been doing this for a a couple of months. Shell Premium gas is used. No check engine light. Thanks

RYE

I also hear a pop sound when shutting off the engine on my C2S with PSE. Wondering too if this is normal?

sandbar

My car, 4S, does not shake nor does it pop. Seems like something is not right in your situation. 700 rpm idle, higher in sports or s+ mode, around 850 I'd say.

bmxtreme

I have some rough idling when in Neutral and Park where the seat vibrates. My kid rode shot gun and said it felt like Chucky Cheese Jet Pack Adventures when I set the car to idle. Anyone found the solution? Dealer is being stubborn about it being normal and gave me BS sports car excuses. I sat in my friends 991 and it doesn't repro.

bmxtreme

Really, no one?

n2cars

2016 C2, manual trans. No shake or pop. the dealer had a 2015 C2 demo that I drove and that car had a lot of shake at idle.