Hello I have 4g15 GDI engine problems not sure where to post. The car is a lancer CS2. What happens is I start the car. The car idles nicely until it heats up then it just sputters and shuts down.likewise If I drive it. When the car gets to proper operation temperature it sputters I loose all gas pedal function and black smoke comes out the exhaust then it shuts down. Did a diagnostic on it. I got several reasons to be the culprit. High pressure, low pressure, fuel rail harness no connected, fuel rail sensor gone bad. I took the car to a Mechanic. He did some trouble shooting. He said the sensor, harness are good. I changed the fuel pressure regulator on the engine itself however same problem. The car won't start now.Can any one help?. Or have suggestions?. Thanks