CJM: Ultimate 370z Fuel Pump Thread

[Jayhovah]

Originally Posted by phunk

That pressure spike is the down side.

You wouldn't need a retune if you fixed it. But you don't need to fix it if it's not causing a problem. It come right back down to spec as soon as you give it some gas. But if it's making you idle rich or giving you startup issues you might want to address it.

Thanks! The car runs fine so I will just leave it =)

[VSS370z]

I've been having start up issues for 2 months now after i upgraded from a walbro 255 to a aeromotive 340 fuel pump and is always when the car sits for hours and it never did it with the 255 fuel pump. I am starting to think i need to do this Idle Pressure thing to possibly sort things out but first i need to find that PDF.

[phunk]

Originally Posted by VSS370z

I've been having start up issues for 2 months now after i upgraded from a walbro 255 to a aeromotive 340 fuel pump and is always when the car sits for hours and it never did it with the 255 fuel pump. I am starting to think i need to do this Idle Pressure thing to possibly sort things out but first i need to find that PDF.

I would recommend getting a fuel pressure gauge in the car so you can see pressure at idle and startup. This would help indicate if there is a possible problem there.