Design
Senior Member
- Joined
- Sep 28, 2015
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- Location
- Southern California
- Vehicle(s)
- 09 MS3, 17 ABM Si Sedan
EGR was my first thought too. But I don't think the 1.5 has one (?).Are you 100% sure you are not getting:-
P0131 (HO2s- 11 Bank 1 Sensor 1 Circuit Low Input)
or
P0401 (EGR System Insufficient Flow Detected)
at the time that the engine is cranking, but not starting ??
Also, perhaps your fuel system is leaking built-up pressure after the engine is shut down, allowing the depressurized fuel to vaporize.
That, and a hot day, might be why the car has difficulties starting after being left during your work period.
If it cranks normally, that likely rules out the starter and battery. But there are simply too many other variables that control fuel, spark and airflow.
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