4.8is Cranks over but engine won't start

[upallnight]

Originally Posted by crystalworks

Yep, other key operations could be fine but EWS ring might not be getting enough signal from it. That's what was so puzzling about the X3's no start. Took a scan with Carly BMW app to get an EWS error that made it make sense.

The battery in the key FOB has nothing to do with the EWS system. There's a chip in the key fob that allows the EWS to recognize the key and enable the starter.

The fact that the engine is cranking is proof that it is not a EWS issue. More likely a dead fuel pump. You can have some one listen with the gas cap off while you do a key on and key off to see if they can hear the fuel pump priming the lines, or you can connect a fuel pressure gauge to the fuel rail and see if ypou have any pressure at the fuel rail.

Last resort will be to give it a shot of starting fluid to see if the engine fire. If the engine fire you have a fuel delivery issue.

Could also be a no spark issue. You can pull one of the coil and insert a new spark plug into the coil and observe if there's a spark. No spark mean you could have a bad CPS (crank position sensor).

[crystalworks]

Originally Posted by upallnight

The battery in the key FOB has nothing to do with the EWS system. There's a chip in the key fob that allows the EWS to recognize the key and enable the starter.

The fact that the engine is cranking is proof that it is not a EWS issue. More likely a dead fuel pump. You can have some one listen with the gas cap off while you do a key on and key off to see if they can hear the fuel pump priming the lines, or you can connect a fuel pressure gauge to the fuel rail and see if ypou have any pressure at the fuel rail.

Last resort will be to give it a shot of starting fluid to see if the engine fire. If the engine fire you have a fuel delivery issue.

Could also be a no spark issue. You can pull one of the coil and insert a new spark plug into the coil and observe if there's a spark. No spark mean you could have a bad CPS (crank position sensor).

Hmmm... I'll have to look into that then. Could have sworn EWS just disabled the spark or the fuel. I seem to remember getting multiple cars with EWS issues that would continuously crank with no start. Maybe I'll have to check out my wife's fuel pump then...