Some 997s have been getting a bit of a misfire under the following conditions:

Car driven to full op temp then sits for anywhere between 1/2 to 3 hours and upon restart when blipping the throttle before engaging a gear (1st or reverse) to pull away the engine has a mis/hiccup @ about +/-1500 rpms. After the engine runs for about a minute or two the mis goes away. Once the engine is put under load the mis/hiccup also goes away. The car does not exhibit the issue full hot or full cold but only as described above.

So...what is it, what causes it to happen and has anyone had it corrected?

BTW, I have tried different fuels and there is no improvement and the issue occurs about 50%-70% of the time.

07 997S 6 speed

 

I haven't had this problem wit my 07 C2s.

 

Thanks for the feedback... i don't think this is or should be a common condition...back to service I go.

 

Is it due to heat soak? Please post a response when you get it diagnosed...

 

It happens on a lot of them, there are other threads on the subject.. I think the revo flash software fixes the problem

 

I had a somewhat similar issue happen once. I was driving at operating temp. Came into heavy stop and go traffic. All of a sudden, it was misfiring - it felt like a 2 stroke motorcycle that had the carb loaded up. It lasted for about 15 minutes. I called the dealer to see if anyone had similar probs and of course, that was a joke. But after that, it has not happened since.

 

Most of the threads I've read is for a hesitation bucking while driving @ speed...mine is just for a minute or two only after a warm start and not when the car is under load/in gear. Have you seen anything like what I've described, if so please elborate as I need to get more data on this specific issue. Thanks.

 

It could be, but I don't know exactly what the problem is...the tech at my dealership said w/o a fault code there isn't much they could do, which was a rather dissapointing response to say the least. Also if my 06 E55 did not do this and none of my other 911's didn't either something is not right here.

 

I have heard of this issue from a few people but fortunately (for me) this is quite a bit different from what's been going on w/ my car.

 

Havent had it happen yet, have about 6500 miles and still seems like its going strong.

 

One guy had the dealer take a look at the clutch and they said everything was fine, I was driving today as the issue was happening and thought about this thread but I haven't heard of a dealer figuring out what the problem is..