ok so this problem started happening 2 weeks ago when i went to drop my sister off to work after 15 min of driving my car just died like someone unplug the batt but all the lights and what not turn on when it died. i left it parked for a couple hours and it started up and drove fine the rest of the day .The next day i drove it it did the same exact thing died after 15min of driving left it for an hour tried to start it and it started right up but died down the street . i didnt drive it for a couple days cause i thought my fuel pump was out so i ordered a new one from walbro and installed it drove my car for 2 days perfectly without any problems thought i fixed the problem but died again when i was on my way home left it for 30 min then tried to start it started right up but died 10 min later tried to start it again after waiting a little it started but died right a way waited again tried it and started and the thing is it drove fine the rest of the night till the next day did the same exact thing
SORRY FOR THE LONG POST BUT I NEED HELP !!
ive changed the fuel pump and fuel filter still no change i also checked my ecu for codes it was throwing a code 12 for the maf sensor will the cause the problem
also i was wondering how do i bypass the fuel relay to check if its the problem