Audi trigger 1.2.16 "hickup"
A customer with a Audi pnp unit has run for a couple of years with various firmwares and the way the car runs and behaves has steadily improved with tuning and better firmware features.
With 1.2.16 the car suddenly developed a strange mis-fire, or ignition miss, trigger miss, or whatever you can call it. Datalogs say nothing, except show that :
- the engine looses a few revolutions and usually catches up
- it can die sitting still in traffic at idle
- it exhibits no problems at high engine load/rpm
Reverting back to 1.2.11 and it runs normal again.
- Datalog [1.2.16 vemslog]
- Slight misses at idle visible in datalog
Can you tell from the configuration of the ECU that something causes this?
Increasing from divby3 to a higher number has not been tested, but that makes no sense as it handles high rpm well (or maybe the misses are not detected so easily at high rpm). Not the most logical thing to try yet.
Engine configuration
- Stock AAN hardware
- Siemens fuel injectors 875 cc
- VAG 115 coils
Other 115 coils have been tested to see if that was the problem before it was discovered that it ran fine with a slightly less recent firmware.
- Suggestion : go for 1.2.16 build 09/23/2013! As I see the log has been made with build date 09/17/2013, which has a known similar ignition glitch problem AFAIK. The newer build solved it -at least for 60-2 and cam sync.