I am welcoming any input as to why my car has been randomly stalling, no engine light showing, no codes to check, no warning signs. As I said it starts right up no problems, but after awhile it shuts down. after it shuts down I am able to restart it immediately. I have replaced MAF, IAC valve had it tuned up replaced fuel filter, camshaft synchronizer. All that came out of it was a drain on my $$. But in defense of the mechanic it was a guessing game without a code showing at all. Someone suggested the ECU? Any ideas?

I have change the starter and camshaft position sensor. The engine is turning but car won't start