About 6 or 7 weeks ago, after being sat for a week, my Cayman S (57 - manual) wouldn't start. All electrics seemed to be funtioning but nothing on the ignition key (maybe a slight whirring noise, but no attempt at all to turn the engine over).
I got a mobile Porsche 'specialist' to come and look at it and he recommended a new battery. I purchased a new battery; same issue. He was giving me the run around, so I booked the car in with a local OPC and called my roadside assistance company expecting the car to be towed. The guy who came put a powerpack on the battery and it turned over first key. Other checks revealed nothing (his check on the battery and alternator showed good), so he advised I give the car a good drive and to save my cash, which I did. Car started for the rest of the day first key and was then left for 24 hours, at which point it wouldn't start again.
I got the recovery back (ironically it was the same guy) but the powerpack didn't work this time, so we push started the car as I needed to drive to Leeds urgently (I live in London) and I had no issues driving up there. I dropped the car straight with an OPC in Leeds as I have a friend who works there, but they couldn't find a fault despite having the car for over a week, with the car starting every time they tried it (they checked the clutch switch, ignition switch, earth straps, alternator, battery, starter, solenoid and all connections and relays etc - diagnostics computer shows no faults).
So I picked the car up and drove back to London. Started fine for a 24 hour period, so I left it a further day and a half, and it still started (although I didn't drive the car, I just turned the engine over to check). Left it a further 36 hours and it won't start again (less than 3 days from last use, which was a 200 mile drive).
Battery reads 12.6 volts on the multimeter. I know that it's amps I need to start the car (and plenty of them) so could something be draining the battery of amps whilst leaving the voltage at 12.6? The voltage drops when I attempt to start the car and then slowly creeps back to 12.6. That said, I've tried my old battery after charging it manually and have also tried a battery from a 911 of a neighbour which we knew to be good as it starts his car, so I don't think it's battery related (at least no purely).
I really am at the end of my tether with this, and my pocket is already a lot lighter, so if anyone has any wisdom to offer, I would be grateful.
Similarly, if anyone could recommend a good independant Porsche specialist in the London area, I would be grateful. I'm thinking Jaz Porsche in Wembley, but I don't just want to keep chucking money at this without some further solid diagnostics.
Thanks all.
I got a mobile Porsche 'specialist' to come and look at it and he recommended a new battery. I purchased a new battery; same issue. He was giving me the run around, so I booked the car in with a local OPC and called my roadside assistance company expecting the car to be towed. The guy who came put a powerpack on the battery and it turned over first key. Other checks revealed nothing (his check on the battery and alternator showed good), so he advised I give the car a good drive and to save my cash, which I did. Car started for the rest of the day first key and was then left for 24 hours, at which point it wouldn't start again.
I got the recovery back (ironically it was the same guy) but the powerpack didn't work this time, so we push started the car as I needed to drive to Leeds urgently (I live in London) and I had no issues driving up there. I dropped the car straight with an OPC in Leeds as I have a friend who works there, but they couldn't find a fault despite having the car for over a week, with the car starting every time they tried it (they checked the clutch switch, ignition switch, earth straps, alternator, battery, starter, solenoid and all connections and relays etc - diagnostics computer shows no faults).
So I picked the car up and drove back to London. Started fine for a 24 hour period, so I left it a further day and a half, and it still started (although I didn't drive the car, I just turned the engine over to check). Left it a further 36 hours and it won't start again (less than 3 days from last use, which was a 200 mile drive).
Battery reads 12.6 volts on the multimeter. I know that it's amps I need to start the car (and plenty of them) so could something be draining the battery of amps whilst leaving the voltage at 12.6? The voltage drops when I attempt to start the car and then slowly creeps back to 12.6. That said, I've tried my old battery after charging it manually and have also tried a battery from a 911 of a neighbour which we knew to be good as it starts his car, so I don't think it's battery related (at least no purely).
I really am at the end of my tether with this, and my pocket is already a lot lighter, so if anyone has any wisdom to offer, I would be grateful.
Similarly, if anyone could recommend a good independant Porsche specialist in the London area, I would be grateful. I'm thinking Jaz Porsche in Wembley, but I don't just want to keep chucking money at this without some further solid diagnostics.
Thanks all.
