08-05-2013, 11:23 AM
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#1
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Registered User
Join Date: Jul 2013
Location: California
Posts: 43
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Camshaft deviation????
Ok hooked up the durametric, lot of interesting information. I read the codes and same codes as before. 300,301,302,303, 341,1313,1314,1315,1319. Plus I checked the camshaft deviation #1 is .25% and # 2 is -.4% is that normal?
the car has a misfire/rough idle around 1000-1200rpm with an associated noise like a rattle or a chain flapping.
I've checked the wiring, checked the coils, and the plugs, the AOS has oil in the tube going to the TB. I've cleaned the TB and the MAF sensor. replaced the air filter and fuel filter. No Help. I need HELP!!! please.
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08-05-2013, 03:47 PM
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#2
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Registered User
Join Date: Apr 2012
Location: Riverside, CA
Posts: 1,666
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Quote:
Originally Posted by doli3415
Ok hooked up the durametric, lot of interesting information. I read the codes and same codes as before. 300,301,302,303, 341,1313,1314,1315,1319. Plus I checked the camshaft deviation #1 is .25% and # 2 is -.4% is that normal?
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Seems good. The acceptable range I've read is between 0 and -6 degrees.
The key is that these numbers are steady and don't fluctuate rapidly.
If they are bouncing around then there is a problem with the timing system, likely the chain/tensioners/variocam.
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2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
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Last edited by jb92563; 08-05-2013 at 03:49 PM.
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08-09-2013, 05:37 PM
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#3
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Registered User
Join Date: Jul 2013
Location: California
Posts: 43
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Deviation update
I ran the camshaft deviation test again. # 1 is 25.0 and # 2 is -4.0. in addition I activated the variocam on both sides (separately of course). When activating the # 2 bank the idle increased and decreased slightly. # 1 bank however almost stalled the car. I believe it's working but with the misfire on that bank the engine couldn't handle it.
Any Thoughts
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08-10-2013, 06:14 AM
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#4
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,617
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Quote:
Originally Posted by doli3415
I ran the camshaft deviation test again. # 1 is 25.0 and # 2 is -4.0. in addition I activated the variocam on both sides (separately of course). When activating the # 2 bank the idle increased and decreased slightly. # 1 bank however almost stalled the car. I believe it's working but with the misfire on that bank the engine couldn't handle it.
Any Thoughts
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Cam deviation value limits are +/- 6 degrees; if you are really reading +25 degrees on bank number one (at idle, VarioCam not activated), you have a problem as the cam seems stuck in the advanced position.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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08-10-2013, 07:44 PM
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#5
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Registered User
Join Date: Jul 2013
Location: California
Posts: 43
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The # 1 bank camshaft deviation is +25.0, and when I activate the variocam it seems to be actuating due to the idle fluctuates up and down. Which almost stalls the engine. If the camshaft is stuck in the advance position how do I correct that?
Could the camshaft position sensor cause this? How can I test that?
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