Loss of rev

[Mass]

While I was driving the 996 c2, it suddenly stopped revving above approx 4000 rpm in gears. The rev speed up to 4000 rmp is sluggish too and the car feels it's in a limp mode. In neutral, the engine revs above this freely.

When parking the car, I have noticed a whining sound coming from the boot area (near the screen washer filler).

Does anyone know what's wrong?

 

[maor]

There's that air pump next to the coolant expansion tank...is that what you mean as please don't go and put screenwash in it......

 

[infrasilver]

While I was driving the 996 c2, it suddenly stopped revving above approx 4000 rpm in gears. The rev speed up to 4000 rmp is sluggish too and the car feels it's in a limp mode. In neutral, the engine revs above this freely.

When parking the car, I have noticed a whining sound coming from the boot area (near the screen washer filler).

Does anyone know what's wrong?

I have had a similar issue for a while that I've put down to a possible fault in the electrics somewhere, sometimes I would drive it and if it ever had this misfire at 4000ish turning the car off and back on again would clear it and it would drive normally again, but recently (on the recent road trip) it would not clear and was missing at 4000 all the time, and now last weekend its misfires all the time, even at tick over as though something has eventually failed that had been breaking down for a while.
I've been struggling to get to the bottom of why as I'm not getting a misfire at the plug or coilpack, I thought maybe injector failing or something vario cam but its showing up as rough running on cylinder 2 only. I'm tearing it apart later so hopefully at some point this weekend I may have an answer as I hate fault finding on a car when there is a mystery problem. :x

Keep us updated if you ever get to the bottom of your problem as any info may help.

 

[ragpicker]

Had exactly the same problem! Turned out it was the electrical connector onto the throttle body.

With the car ticking over just fiddle with the connector on the tb. If this is faulty the engines behaviour will change. Wd40 and clean the connectors. You'll be good to go! :thumb:

 

[Mass]

Cheers guys.

Did you have a noise coming from the front boot area near the screen washer filler too?

Thanks.

 

[911_DRE]

Had this happen, changed the coil packs and spark plugs and it resolved the issue.

ragpicker - Out of interest, what exactly did you do to your throttle body connector? - Was there a loose connection or something you had noticed?