On several flights I have created and activated the engines have just plain shutdown. 1. a flight from KPIA (Peoria, IL) to KGGG (Longview,TX) the engines quit about the middle of Arkansas. 2. a flight from KGGG (Longview,TX) to KTYR (Tyler, TX) the engines quit a short time into the flight. 3. a local flight at KGGG to find out what is going wrong. The engines quit on final ILS to KGGG. 4. A lcal KGGG again to try and find what is causing the problem. Took off on Runway 13 and climbed heading to 2500' and turned 180 to heading 310 . The aircraft settled on heading and the engines quit. I restarted the engines and complete the flight to an ILS landing at KGGG. This has been going on since I re-installed the aircraft, four flights and four engine failures.