I'm having/ been having the same issue for a while. Even before the car was tuned
accelerate with load/ boost, then decelerate and engage clutch fully, or neutral the engine shuts off
I noticed this happens only when after accelerating with load

yes the car does have a LWFW but I've had the LWFW for 5 years on the car. This started happening 2 years ago (initially it was once in a while issue, now its become more frequent)

Mass airflow sensor, alternator and ground cables, Throttle body, fuel pump, fuel filter, new clutch and fw, all been replaced recently... the problem is still there
could it be the crank sensor? injectors?

 

ive been reading quite a bit on the LWFW and most people have upgraded the pulley that the RS equivalent use. but how much would this have an affect on the engine turning off when decelerating...