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Old 07-17-2019, 09:05 AM   #1
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Question P0300-303 1340 Misfire

Can you guys help? 2002 Boxster S with 105K
Have a P0300 through P0303 codes (bank 1) and P01340
with misfire at idle and low revs, then smooths at RPM, but, then I noticed a chain type noise at 2500 or so?
Concerning to say the least. All happened right after I got a full tank of Shell Premium, btw.
Any thoughts?
Could it be chain guides on IMS ro just plugged Injectors or bad MAF....need help please!

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Old 07-17-2019, 10:27 AM   #2
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Variocam actuator slow or failed, IMO.
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Old 07-17-2019, 11:22 AM   #3
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Variocam actuator slow or failed, IMO.
Are you saying Solenoid gone bad?
Or the actual mechanism?
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Old 07-29-2019, 12:30 PM   #4
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Can anyone help me on this<
I got one reply that it may be Variocam Solenoid...could be, but is that all?
could it just be the tensioners?
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Old 07-29-2019, 01:45 PM   #5
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Originally Posted by 86fromCA View Post
Can anyone help me on this<
I got one reply that it may be Variocam Solenoid...could be, but is that all?
could it just be the tensioners?
No, it is not the tensioners. P1340 is very specific, it indicates that the chain on bank 1 is out of position high, which could be the VarioCam solenoid, the VarioCam unit itself, or the chain has jumped time due to pad wear. This is going to require further investigation to determine which one it is.

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