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Sudden P0300/P0301/P0302/P0303 codes

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Old 10-27-2017, 01:22 PM
  #16
srmorse
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So an update...the local Indy shop did the sam position sensor replacement and verified that the variocam actuator is working and physically inspected timing...and it appears timing is off. They are saying could be slack in chains, pads/tensioners, or possibly IMS (even though it is an LN retrofit). They are going to removed covers in next couple days, but not looking too great right now.
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Old 10-27-2017, 01:29 PM
  #17
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Originally Posted by srmorse View Post
So an update...the local Indy shop did the sam position sensor replacement and verified that the variocam actuator is working and physically inspected timing...and it appears timing is off. They are saying could be slack in chains, pads/tensioners, or possibly IMS (even though it is an LN retrofit). They are going to removed covers in next couple days, but not looking too great right now.
Yup, that's what the code complains about. Hopefully they will check the oil and oil pan for debris.

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Old 10-27-2017, 01:57 PM
  #18
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OP.Suggest you discuss your 'while you are in there' list to make virtue from necessity.
The Indy confirms your Cam Sensor was defective? Really? If so keep the one they removed for bench testing
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Old 01-12-2018, 02:59 PM
  #19
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Hi all--

So wanted to provide an update and HOPEFULLY this issue is now in the rear view mirror. I picked up the car yesterday from the shop, and have enough miles on it that it was able to be inspected. Knock on wood...

So a bunch of things transpired since last update. But the long and short of it is that both actuators seem to have been on their way out. Operating sometimes, not responding at all sometimes and sometimes being "lazy". Early on we replaced both cam position sensors (both banks) to no avail. Initially a smoke test (done when over 50 degrees) showed no vacuum leaks...but when car was below 50 degrees a subsequent smoke test showed several vacuum leaks. Once solved that stopped the misfire codes, but we were still getting timing codes.

Outer pads on the variocam actuators looked OK (not great) but inners were really worn. That couple with the intermittent nature of actuation and release we ended up replacing both actuators. Photos of the parts replaced can be found at http://www.photoplace.com/Cars/2000-...-2017-18-work/

So hopefully this long and drawn out journey is ending...my early porsche ownership experience has not been great. Now tucked away in the garage until salt off the roads for a more extended drive. Pinion bearing is also giving up the ghost so a rebuilt transmission (or good used one) will be in order next. If anyone has a lead there send it my way!



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Old 01-13-2018, 05:44 PM
  #20
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Interesting - good Photos.

I guess that's all the little black pieces you see in your oil filter over time.

What mileage/ age is your car out of interest ?
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Old 01-14-2018, 12:08 PM
  #21
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Cheap 996's can be expensive...Glad you got it sorted out!
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Old 01-14-2018, 01:47 PM
  #22
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Car has 148k on it now...engine was refreshed 30k ago but for sure nobody did anything with the actuators or pads then!

Originally Posted by beetleything View Post
Interesting - good Photos.

I guess that's all the little black pieces you see in your oil filter over time.

What mileage/ age is your car out of interest ?
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Old 01-15-2018, 12:40 AM
  #23
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Just out of curiosity, and not to poor salt in the wound, but how much did all the work cost? Also, if you know, about how much was it to have the pads changed? Thanks!
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