laughatrice

iTrader: (12)

The center connection of the fuel sending unit of a 99 is that a vent? I can't really tell the fuel system has been modified on this car but that line just seems to vent under the hood.

One more question I'm installing a magna fuel pressure regulator using boost reference and an entirely new fuel lines and magna fuel fuel filter. Since the return will now go back to the tank after it goes through the under hood regulator can I remove the stock regulator in the fuel sending unit?

Thanks

Lonnies Performance

iTrader: (16)

You will need to remove the intank regulator.

I would leave the vent system in place so there are no fuel vapor issues.
There should be a connection on the intake for the vent. If your car was modified, I would suggest looking at a stock one & try to replace the missing parts. It does not hurt performance, so I see no need to remove the stuff.

laughatrice

iTrader: (12)

Yea my vent dead line dead ends under the hood next to where the stock feed line enters the hood. I'll plan on leaving that as is.

Can the return just pour right into the tank from the top of the sending unit or does it need to be submerged?

Last question and I've looked for stock fuel system schematics and pictures but the two harness that connect to the top of the fuel sending unit I know one is to power the fuel pump what is the second for? I'm assuming it's the stock regulator control.

Lonnies Performance

iTrader: (16)

The second wire is for the emissions pressure sensor in the tank.

laughatrice

iTrader: (12)

Ok so it looks the previous owner installed a racetronix harness when they put the walbro pump in. Since I'm adding a second walbro pump can I just split off from the racetronix harness and hotwire the second pump or do I need to run a fresh power line strait from the battery?