Sorry new to this forum thing so may have posted in wrong place etc, have looked at old threads but not getting exact answers I want so thought I would give this a try. Just bought a 100,000 mile ‘06 997.1 Carrera S manual, loads of history in really excellent general condition, but well used, and lots of maintenance over its life.
Was bought with statement that it has minor bore score, although no major evidence of it, bore scope shows very light scoring on cylinder 6, and I haven’t noticed any major usage of oil, but then haven’t done much mileage. It also has a puff of white smoke on start up, that very soon settles, so either a bit of oil running down scoring under piston ring, or possibly AOS? That remains to be seen…
That’s the history on it now the issue.
Drove it home about 100miles, couldn’t stop smiling, and then have only done a few 10-15 mile trips, cant remember if it was before or after I carried out an oil and filter change and fitted a magnetic sump plug, old oil wasn’t to bad and ripped up old filter with no metallic bits evident, but have been having a flashing warning light and error message and crazy lumpy running recently, almost so bad I thought I was destroying something driving it. But got home and parked up to have a think for a few weeks.
Wanted to have a play so ordered new coil packs, spark plugs, heat shields and exhaust mounts, clamps etc. And to be fair very simple job swopping out all six only took about 1-2 hours. Took the beast out for a drive and was awesome no errors, a good 10-15 miles, as I got home engine check light flashed for about 1 second, no misfire, and disappeared.
Subsequently took it on a 30-40 mile trip, on start up within 1-3min warning light but no obvious misfire, decided to keep going, as it went off again and car ran beautifully for 10 miles, again flashed on but with no evidence of misfire, then after another 2-3 miles warning light, and flashing ! with obvious minor misfire, continued driving and it would disappear and then come back, eventually it went to very bad multiple misfire to the point I parked up and had a mate collect me as we were meeting up anyway, left it for an hour came back started up perfect no warning or misfire, and then again warning light, flashing ! and evidence of minor misfire, just kept driving and it kept coming and going, generally when revs dropping lower or at traffic light I noticed it, so tried to keep revs up, and took a few gaps, was actually a hell of a lot of fun in a 2 wheel drive in the rain, and managed to get back home.
Plugged in my £15 Amazon code reader, and have PO300 multiple misfire, and this time misfire cylinder 1,2,3,4. Prior to this 5 & 6 have also come up.
So finally the question please help me figure this out, lots of talk about solenoids(assume this is one of the actuators?)on the forum, but seems strange as it’s both banks of cylinders?
Also can someone please explain what the two actuators on each side of the cylinder heads actually do? Design911 said part numbers are Actuator Valve 99710530100, and Actuator Camshaft 99610530307. What do each of these do and which is more likely to be faulty, or is it worth changing all four, which is about £700 just in parts?
Thanks in advance.
Was bought with statement that it has minor bore score, although no major evidence of it, bore scope shows very light scoring on cylinder 6, and I haven’t noticed any major usage of oil, but then haven’t done much mileage. It also has a puff of white smoke on start up, that very soon settles, so either a bit of oil running down scoring under piston ring, or possibly AOS? That remains to be seen…
That’s the history on it now the issue.
Drove it home about 100miles, couldn’t stop smiling, and then have only done a few 10-15 mile trips, cant remember if it was before or after I carried out an oil and filter change and fitted a magnetic sump plug, old oil wasn’t to bad and ripped up old filter with no metallic bits evident, but have been having a flashing warning light and error message and crazy lumpy running recently, almost so bad I thought I was destroying something driving it. But got home and parked up to have a think for a few weeks.
Wanted to have a play so ordered new coil packs, spark plugs, heat shields and exhaust mounts, clamps etc. And to be fair very simple job swopping out all six only took about 1-2 hours. Took the beast out for a drive and was awesome no errors, a good 10-15 miles, as I got home engine check light flashed for about 1 second, no misfire, and disappeared.
Subsequently took it on a 30-40 mile trip, on start up within 1-3min warning light but no obvious misfire, decided to keep going, as it went off again and car ran beautifully for 10 miles, again flashed on but with no evidence of misfire, then after another 2-3 miles warning light, and flashing ! with obvious minor misfire, continued driving and it would disappear and then come back, eventually it went to very bad multiple misfire to the point I parked up and had a mate collect me as we were meeting up anyway, left it for an hour came back started up perfect no warning or misfire, and then again warning light, flashing ! and evidence of minor misfire, just kept driving and it kept coming and going, generally when revs dropping lower or at traffic light I noticed it, so tried to keep revs up, and took a few gaps, was actually a hell of a lot of fun in a 2 wheel drive in the rain, and managed to get back home.
Plugged in my £15 Amazon code reader, and have PO300 multiple misfire, and this time misfire cylinder 1,2,3,4. Prior to this 5 & 6 have also come up.
So finally the question please help me figure this out, lots of talk about solenoids(assume this is one of the actuators?)on the forum, but seems strange as it’s both banks of cylinders?
Also can someone please explain what the two actuators on each side of the cylinder heads actually do? Design911 said part numbers are Actuator Valve 99710530100, and Actuator Camshaft 99610530307. What do each of these do and which is more likely to be faulty, or is it worth changing all four, which is about £700 just in parts?
Thanks in advance.
