so i got my s4 beginning of october. about a week after that while i was driving, the car shut off a couple times so i towed it home. the next day and since then until last nite it was fine! it died last nite while i was driving again. it still had all power tho. and a few hours after i got it home it started again??? why would the car just shut off randomly? and then i can start it back up and everything is fine, and no check engine light comes on. so for almost a month it has not shut off at all and has been running great. could it be some kind of sensor, oil pressure??? anything will help guys! thanks!

 

Check your fuel pressure and look for a weak/failing fuel pump..

 

if so i just switched to a walbro 255... i have an oem laying around that ill sell ya if that is the case..

 

sounds like a fuel pressure issue or your MAF sensor

 

it has a 255 on it rite now....i was thinking of replacing the main fuel relay..would that help ya think???

 

maybe; how long has the pump been in for?

 

i think it has been in for 2-3 years

 

Doesnt mean its good.. especially if it was an e-bay buy. First thing first is to do a fuel pressure check.