Emu Black- Porsche 911 - Cam Sync Issue at higher rpm - Hall Effect Sensor ZF/Cherry

EMU BLACK / CLASSIC
21

ok
problem is def not solved!

For whatever reason, it is now producing the high rpm/high load cam sync loss again.
So I changed the ‘cam sync disable’ setting to ‘above 2000’…

Everything was fine… drove it a few weeks.

Went for a 40 minute drive to see someone. Parked for 10 minutes.
Came back and started fine… idling… for 20 seconds or so… then it stalled. It has NEVER stalled at idle before.
Checked the log and sure enough, cam sync loss.

Sent the logs/tune file etc to ecumaster for comment. They replied they think one of my hall effect sensors is faulty with the reason being excess heat in the engine bay.

Problem is, the engine bay wasnt hot and I have since driven this car at the track and got it REALLY hot and it never lost sync at idle again.

I guess I could just put a new sensor in there and monitor… but I’m now considering adjuting the cam sync disable value to maybe “500”… a number that should allow the car to sync and start but once running, to ignore it.

I have not pulled the wiring apart, but find it difficult to think it’s a wiring issue seeing as 99% of my issues are ONLY at high rpm and high load. High rpm and LOW load doesnt cause an issue.

22

I’m following because I have similar issue. I adjusted cam sync disable value to 1200 to temporary solve the problem. If you happen to solve it, please post it and I sure will do the same.

23

hi
sorry to hear you are having same problem.

I checked my crank trigger sensor gap. It was less than 1mm. Closer to maybe 0.5mm. I’m not sure how this happened (obviously my error!).
The specs for the sensor call for 1.5mm (from memory). I widened the gap and so far, have not had the issue again. Not yet anyway. I don’t want to call this ‘solved’ just yet as I have only driven the car a few times… but fingers crossed.

24

Have you tried a smaller pullup resistor ?
Makes it less vulnerable to noise etc. Hab a similar problem with a Honeywell sensor on my Porsche 911.

25

update - my issue is still present! At higher rpm, and WOT, it will lose cam sync and BANG out the exhaust. I’ve now set my camsync disable to 2000 rpm so above that it won’t keep looking for sync. I consider this a bandaid solution as it is not a solution, but simply ignoring it. Perhaps I need to try a replacement crank sensor. I have checked the wiring and it is good or at least as much as I am able to check and all grounds are secure.

26

If you dont run vvt thaere is no issue engine runs fully sequential..

27

Common, this should not happen. I have a VR cam sync sensor and also I’ve disabled it above certain RPM as I’ve seen these errors.

Surely it just needs to sync once per engine start/stop cycle to run fully Sequential, but seeing it’s losing sync is frustrating.

Workaround is to disable sync above certain RPM, but it’s just workaround, isn’t it?

28

Thsi is commo feature even in hi end pectel sq6 existing