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wizard replied to ekstroemtj's topic in 9PA, 9PA1 (Cayenne, Cayenne S, Cayenne Turbo, Cayenne Turbo S)Guten Tag, Thomas. I'm not at all familiar with Cayennes but, if there's a difference in total wheel diameter between your summer and winter tyres, wouldn't that affect ride height and air suspension setting? Just a thought as to what might trigger the code.
wizard replied to Enaifos's topic in 997-1 Series (Carrera, Carrera 4, Carrera 2S, Carrera 4S)Are there indications of it overheating? If yes, have you tried ' burping' the system and was the Porsche coolant that you used to top-up the same as was already in there? You presumably did dilute it with 50% distilled water? How many miles on the car, have you replaced the water pump and, if yes, was it with a Porsche original pump? You may also wish to check your mechanic's work on the temperature switch.
wizard replied to brwilson's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Firstly, my apologies to JFP for butting in. I really must read before positing. As he says, what is in the oil filter will provide an indication as to how serious it is.
wizard replied to brwilson's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)If you Google 'sound of knocking con rod', that should enable you to rule that in or out .... without starting your engine, of course.
I notice that you originally had P2177 and P2179 codes. If after the next refuelling (to ¾ full), indications are that the evap canister is not the culprit, as another 'experiment' you may want to remove the MAF sensors and give them a spray cleaning. It's not too difficult a task, but it does call for a specialised MAF spray cleaner and particular care in carrying out the cleaning/drying process.
The only thing I can suggest for now is to not fill the tank beyond ¾ full when you next refuel and see if that has any positive effect.
For clarity, the battery was reading 12.6V this morning, before starting and after resting overnight without the trickle charger connected?
On the assumption that you didn't trickle charge it overnight, did you check whether or not the battery was holding its charge overnight?
Filling to the brim each time may be giving rise to your problem - a saturated evap canister - as Lewis alluded to.
Still no codes? Filled up to the brim or not? If to the brim again, have you detected a smell of petrol at all with the filler cap closed?
Despite not having starting problems after refuelling, as the cost of a new purge valve is considerably less than what I imagine the cost of vehicle recovery would be, perhaps that's the route to take. What I can't fathom is why, without tampering with the evap system, you are not seeing a fault code related to that. Could it be that the reader that you have is not giving you the full picture, I wonder?
Shooting in the dark here but might I also suggest that before filling, you go through the motions of filling the vehicle (removing and replacing the petrol cap), then drive 5 miles or so to the petrol station to actually fill it half full. Hopefully this would indicate whether it's something to do with removal of the petrol cap (doubtful) or the result of petrol entering the tank.
Bizarre! So, for the first 30-odd miles of your journey yesterday it was fine? It then acts up to the point of stalling altogether after filling the tank but is fine everyday thereafter? Are you putting it on trickle charge every night?
wizard replied to mdreef's topic in 996 Series (Carrera, Carrera 4, Carrera 4S, Targa)Has this arisen suddenly or has it been an issue over a period of time? If the latter, had you just replaced something when the overheating started to become an issue? Is the waterpump a Porsche one?
You shouldn't need to be trickle charging a brand new battery unless it's duff out of the box, there's a charging problem or a parasitic drain. It's relatively easy to rule those in or out with a multimeter.