While driving late at night, I usually speed upto a 110km/h and then switch gear to neutral and slowly let friction slow me down. What happened last weekend was that the idle rpm fell to 350 and the car engine shut off. I started the car again and all was good. Since then I've been noticing that this is happening randomly. Sometimes 8 times in a single day. Sometimes not once in three days. On the third day when this first happened my check engine light came on, but went away after a few hours. Also whenever the check engine light is on I feel the car is getting a bit sluggish. Recently this has increased as well.
Anyway, I've already refreshed my ecu via showroom. Also I've looked at the maintenance file at home and know for a fact that engine oil was changed 6k ago , ( liquimoly so usually change at 12k ), oil filter air filter and ac filter were all changed recently. Plugs were changed 1500km ago. Throttle body was serviced 2500 km ago.
I usually understand whatever issue is being faced before going to any mechanic or showroom. This thread is for that exact purpose, so please advice.
48000 km on the odo.