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JFP in PA
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PSE (Porsche Sport Exhaust) Install
JFP in PA replied to Loren's topic in DIY Articles - Carrera (996) - Mods
Welcome to RennTech The beauty of the Porsche sports exhaust system is that if you leave the vacuum connections disconnected, it is in the loud position at all times, giving you max flow. I would simply remove the wire the previous owner installed which decreases both sound and performance and enjoy the ride.............and the sound. -
Alarm systems are designed to not be easy to disconnect for obvious reasons. Get the batteries replaced and you will be back in business.
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Low battery output can cause the type of alarm problems you are describing. If the car was in my shop, I would load test both batteries and replace them as required. I would also do voltage drop tests across the primary battery cables for both batteries; cable condition is critical to the battery getting charged correctly and cause all sorts of weird electrical issues.
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Whatever you did electrically, it sounds like the fuel system needs to be recalibrated, which requires draining both sides of the tank, refilling with a specific amount of fuel, then use of the PIWIS system to recalibrate the vehicle.
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Jake has probably forgotten more than most of the rest of us combined know about these engines, so he is a trusted source. You would be wise doing both sides, the IMS, the RMS, new plug tubes, etc. all at the same time; you really don't want to go back in there six months down the road.............😉
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Nope. Because you often need to replace the actuator, to do this, you need to lock the engine at TDC, remove the cam cover, cam shafts, the chains, and then the actuator. This will require the use of cam retaining tooling, cam holding tooling, and reallocation of the cams (requiring special tooling) when putting it all back together. It would also be an excellent opportunity to replace the two cam wear pads between the camshafts as these are considered a "consumable" wear item in these engines. If it would help, Jake Raby and PCNA recently put out a video about just replacing the wear pads, but it gives you an excellent overview of the process and special tooling involved: Raby/PCNA replacement of cam wear pads on 5 chain 996
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It is the plunger assembly in the actuator, and it is a very common problem:
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Yes.
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It would depend upon what position the actuator failed in; because these are hydraulicly operated devices, a small bit of debris in the oil, which you stated you have, can jam the actuator piston in a "partial" position, which drives the system nuts. Usually, if the CPS is having issues, you get a P0336 code, but not always. The device is a simple Hall Effect sensor, so if you disconnect the harness to it, you should see 0.8 to 1K ohms between pins 1 and 2 on the sensor plug, and infinite ohms between pins 1 and 3; if either is not correct, can it and replace it with a new one.
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Welcome to RennTech P1340 indicates the bank 1 exhaust cam allocation is not correct. P1319, 1318, and 1316 indicate individual cylinder misfires P1531 indicates bank 1 cam is not assuming the active position (possible bad actuator) You have a problem with the bank 1 VarioCam system, which could be anything from a failing actuator to the cam itself being out of timing position. You need to get the car scanned with a Porsche specific diagnostic tool (Durametric, PIWIS) which can not only see the actual cam angles in real time but can also test trigger the VarioCam system one bank at a time to evaluate how the actuators are working. I would also consider not driving the car until you can get it evaluated as the engine really does not like running like this, and you could do more damage doing so.
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It means the Vario Cam is working.
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It's is used at the assembly line/factory, not used by PIWIS or anything, has a data line from the DME only though that can carry the same info from DME, but no other data lines included in it like the PIWIS/OBDII connector.
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There are several locations in this vehicle, this video may be of help: Cayenne fuse and relay locations
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A good scan with the PIWIS will look at everything electronically, otherwise the usual maintenance suspects (oil, air and oil filters, brake fluid flush, etc.).
