350x bad engine noise.

[gtrob]

This is going to be hard for me to explain as I am in Australia and the car I am inquiring about is In Dubai. There vehicle in question Is a US spec 2003 350z. It's a good friend of over there and I got a panic call this morning saying. "My car just made a noise like gravel in a food blender and then stopped and is now hard to start and won't idle and the noise is still there". Now about all the info I can get out of her is that the car has been running a little warn over the past few days and has been vibrating at idle. (Thinking miss fire). Not having much to do with these my self, any ideas on common faults with them would be great and also will a jap spec engine be a straight swap or will that be way to much of a head ache, as she held the phone up while it was running and its real bad internal sort of noises going on and I'm thinking a motor change may be on order.

[VQ30DET S13]

Is the engine modified?

This is going to be hard for me to explain as I am in Australia and the car I am inquiring about is In Dubai. There vehicle in question Is a US spec 2003 350z. It's a good friend of over there and I got a panic call this morning saying. "My car just made a noise like gravel in a food blender and then stopped and is now hard to start and won't idle and the noise is still there". Now about all the info I can get out of her is that the car has been running a little warn over the past few days and has been vibrating at idle. (Thinking miss fire). Not having much to do with these my self, any ideas on common faults with them would be great and also will a jap spec engine be a straight swap or will that be way to much of a head ache, as she held the phone up while it was running and its real bad internal sort of noises going on and I'm thinking a motor change may be on order.

[gtrob]

Nope standard