I have a 1991 honda civic like 6 moths ago a did a swapp engine came off a 1989 integra double cam zc jdm engine complete with a pg7 ecu swapp came out good no problems then I drove it like for 3 moths and stop the car in the garage for like 3 moths 2 weeks ago I decided to turn it on and drive it around well at first dead battery the alarm suck all the battery well got a battery put it on and car start it normal so I left it turn on like 10 minutes to warm up so it turn off well big deal I when again and start it up well it start up again with no problem it idles correct but after a bit it turn off again so I turn it on again and turn on with no problem so I end up takeing for a spin car runs perfect but sometimes it turns off once in a wild since that day the car continues doing that what could be the problem please help o and no engine light on check the ecu no codes are given I change some stuff like tps sensor crankshaft sensor map sensor and proplem continues please help have any body have any idea what is it please help thanks