__ Charley __

Hi!

What is your opinion and experience About my idle? Is it normal? Car is a 991.1 4s.
Condition : Warm engine, normal mode.
Maintenance up to date, New plugs. New Map sensor.
Just had changed 1 cam solenoid and 1 valve lift solenoid.

Thanks!

rnl

requires Italian Tune Up
check back with us after finished.


seriously, the other valve solenoid may need to be replaced...

__ Charley __

This is what I was wondering. Was the idle related to these solenoid?

Joec500

did you go through the throttle body adaptation/reset procedure?

__ Charley __

Yes i did the reset procedure.
No change after..

Joec500

is this in Sport Mode?

__ Charley __

In the video it is in normal mode.
But same thing happens in sport...

duxsi

Why did you change 1 cam solenoid and 1 valve lift solenoid? Error codes?

__ Charley __

I changed due to multiple misfire. The car was no longer usable. My mechanic started by changing the side of the lift valve solenoid but nothing changed. Then he changed the cam solenoid and the misfire changed bank. So the cam solenoid was changed but the misfires continued. Than he changed the valve lift and the codes are gone! This means that these parts work together and that one can compensate for the other. Since changing the car is much better at the start but still the stumble around 2800 rpm and the idle unstable .. I wonder if changing the other two others would fix things .. Or how to test their proper functioning ??

97supratt

Seems normal to me, high hp engine has a funky idle sometimes.

Southbranch

100 - 150 rpm fluctuations like that are not normal compared to my 991.1 GTS. It should be nice and steady whether in normal mode or in Sport/Sport+.

__ Charley __

That is exacly what i think to..

i sending the opinion.

Ducaiti999

I am also having an idle stumble. I've swapped cam sensors. New 02 sensors.

My short term fuel trims are unstable. Bank 2 will drop down to 73 or so just before the stumble. Bank 1 stays basic steady.

Where you able to find your issue?

​​​​​​How many hours did they charge for the cam solenoid swap?

Thanks

__ Charley __

Last update for me : changed the throttle boddy and the car has no more stumble or rough idle.
I strongly suggest that your mecanic test the respond of your TB before doing anything.
Let me know!

Watson

Cool! What was wrong with the original throttle body? Did it have some carbon fouling? What is the mileage of your car?