Help!! X5 sputtering
 

Hello again i was on my way to a friends house the car was driving fine then it was feeling a bit shakey and then it was sputtering i pulled over it revs and idling fine so i continued on and it did the same thing again so i turned around and started to go home. as i was getting closer it was getting worse. i thought it would be either the maf or the coil pack i just replaced the maf so i know it wasnt that so i was thinking its a misfire and a bad coil pack but i checked the codes and all igot was p0313 which is misfire on low fuel. so now im stuck
any help would be awesome
thanks gio

the fix-- main fuel pump and fuel filter

You're out of gas, either the tank is empty or your fuel pump is not pumping enough fuel under load. You can connect a gauge to the fuel rail and determine what type of pressure you have.

It's reading a half a tank.

Check for any air leak. I replaced my MAF before and didn't tide one of the air hoses. After a couple of drives, it came off and had the 3 warning lights/no power problem while driving, one day.

fuel gauges can be wrong. Easiest thing to check is just fill it up and see if it takes half a tank or more...

after that, you have to identify the source of fuel starvation - I would add plugged up fuel filter to the list above.

If you have a bad transfer pump, the side of the gas tank with the fuel pump will be almost empty and the side of the tank with the sending unit for the gas gauge will say half full or half empty depending whether you are an optimist or a pessimist.

Easiest and cheapest way to determine this is to go and fill the truck up. If it take more than 10 gals to fill a half empty tank up to full you have a bad transfer pump. Keep the tank top off and you won't have the sputtering problem.

I will do this today thank you for your help!!

Post how much gas you had to put into the X.

ok i will

Hello Upallnight i ran obc test 6 and it stated that left side had much more gas than the right side. I tried to start it before putting gas in and it didnt start i put about 2 gallons in and it started right up so im guessing that its the sucking jet pump thats to blame