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Vario cam valve lift solenoid?

 
Old 07-02-2016, 04:26 PM
  #16  
Noah Fect
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Well, there's your problem. Your cam shaft fell out.

Dealers...
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Old 07-04-2016, 09:59 PM
  #17  
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watching...
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Old 07-09-2016, 12:44 PM
  #18  
Roosell
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Originally Posted by Roosell View Post
Now Iíve had gentler, milder, fleeting events happen before that I now recognize as similar to what others are describing.


Iíll come back later with some information on the intermittent events I now recognize were short term malfunctions of this part, which preceded the outright failures Iíve experienced.
The events I believe were precursors to the full failure of this part were (as I recall) at lower road speeds, and with the engine RPM also in the lower range. Almost certainly under 3,000 RPM, and probably under 2,500. Sorry I can't be more precise.

I would feel shuddering and vibration, throttle response would be lethargic, and that would snap my attention to the gauges. No warnings came up on these lesser events. The sensation would be considerably less dramatic than the two times the part has failed and required replacement, but still similar. That's the reason I think the two types of events are related. Back to these events: Reflexively I would pop the transmission into neutral and rev the engine, much like you would do to clear out the carburetors of an older car or 2 stroke motorbike. The event would be over in just a few seconds, the car would return to working as normal, and I would feel dumb. "Did that just happen?"

This happened a minimum of twice (I know it happened once with my wife in the car, and once by myself) and possibly three times between the first replacement of this part and the second failure. Unfortunately I do not recall if it happened before the first failure and replacement. I have not experienced any malfunctions of any sort since this second replacement, though I have only driven a couple of hundred miles. If anything else happens on this topic, I'll come back and post.
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Old 06-12-2017, 06:32 PM
  #19  
NiteJav
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Default I ran into the exact issue.

When the car was warmed up (30 minute drive) at some traffic lights or times I came to a stop the car would almost stall. I have a (PDK car) and it was like a person was learning to drive stick behind the wheel and not working the clutch very well. The car would almost stall, the engine would shake the whole car because it got down so low rpm wise. Craziness. It was a royal pia to replicate because it would do it intermittently.

I drive to the dealer, no problems, (of course) 10 minutes from the dealer after they cleared all codes (I had a bunch of misfires recorded), re-adapted the throttle, the problem came back in full force. So I drove back to the dealer again. More misfires, and I was able to recreate it for a tech. They ordered parts on Friday got my car back today (Monday). Pretty good turn around on their end.

So far so good, it was really hot out and the drive home no issues. I could even tell when off throttle the car felt way smoother. So far so good, will report back when I do my usual drive that set this thing off in the first place.

Replacement Part Number:
9A1-105-308-03



Seems this part number has been revised more then once. Keep in mind I have a '14 C4 with 48k miles.
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Old 12-29-2018, 03:55 PM
  #20  
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I believe I am too having this issue.
I have a 2013 3.4 with under 30k miles
I am noticing a rough/stumbling idle and throwing the code p0172 (System Too Rich Bank 1)
I also have a "stored code" p1382 - which comes up as valve lift in Bank 1 according to Porsche

My assumption is I need to have the valve lift solenoid in bank 1. Has anyone with this issue had similar codes?
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Old 12-29-2018, 06:17 PM
  #21  
Stevie
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Originally Posted by adnanm3 View Post
I believe I am too having this issue.
I have a 2013 3.4 with under 30k miles
I am noticing a rough/stumbling idle and throwing the code p0172 (System Too Rich Bank 1)
I also have a "stored code" p1382 - which comes up as valve lift in Bank 1 according to Porsche

My assumption is I need to have the valve lift solenoid in bank 1. Has anyone with this issue had similar codes?
I've had the p0172 (plus B1 RICH, P301 MISFIRE 1, P0302 MISFIIRE 2,PO303 MISFIRE 3, P0300 TOTAL, 00418 PSM CONTROL UNIT. PDK: P199A IMPLAUSIBLE ENGINE TORQUE). Replaced the solenoid 9A1-105-308--03 $176. & $472. labor in 9/14/16 and not had any trouble since.

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Old 12-29-2018, 07:33 PM
  #22  
VII7
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A few pointers:
- Someone previously noted they had this problem twice, it is likely only one solenoid was changed and then the other one failed. It is strange these parts are failing so early but it is common for them to fail close to one another.
- Part is only about $140 and replacement is easy as part is held by two bolts on outside of engine and access is ok
- Switching sides (as done by the tech) is an easy way to diagnose (if fault follows)
- This part controls valve timming so on failure the mixture will be incorrect and engine will misfire, damage is possible so avoid driving if misfiring
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Old 12-29-2018, 10:06 PM
  #23  
adnanm3
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Originally Posted by VII7 View Post
A few pointers:
- Someone previously noted they had this problem twice, it is likely only one solenoid was changed and then the other one failed. It is strange these parts are failing so early but it is common for them to fail close to one another.
- Part is only about $140 and replacement is easy as part is held by two bolts on outside of engine and access is ok
- Switching sides (as done by the tech) is an easy way to diagnose (if fault follows)
- This part controls valve timming so on failure the mixture will be incorrect and engine will misfire, damage is possible so avoid driving if misfiring
thanks. I'll probably just order both in that case. Is there any DIY on this? I wasnt able to find one in my search
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Old 12-29-2018, 10:38 PM
  #24  
VII7
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You might be on the unique position to create one. Part is on top side of engine on either side, remove wing for easier access.
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Old 12-29-2018, 10:46 PM
  #25  
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Not quite but there is:
https://rennlist.com/forums/997-foru...4-5-6-a-4.html

Do create one if you get a chance
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Old 12-30-2018, 12:06 AM
  #26  
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Originally Posted by VII7 View Post
Not quite but there is:
https://rennlist.com/forums/997-foru...4-5-6-a-4.html

Do create one if you get a chance
thank you!
I wish I did this before swapping my exhaust. It seems removing the bumper and mufflers is necessary to get this done, correct?
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Old 12-30-2018, 12:20 AM
  #27  
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I have not done this myself but you shouldn't have to on this platform.
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