Fuel pressure regulator ?

[stangman16]

I'm trying to complete an EFI conversion on my classic & i'm not sure if the Fuel pressure regulator connection on top of it, is a vacuum line? If it is, does it matter where I run that to - say onto the upper intake maybe? I don't have an EGR.

Thanks for any info!

 

[vristang]

Congrats, it sounds like you are almost done.

The nipple on the fuel regulator does go to a vac source.

Directly to the upper intake is probably the best place. There should be a couple of locations you can tap into.

Since you are converting to efi, be sure to disconnect that fuel line (simulating wot) when you set/check the fuel pressure.
Pressure should be 38-40psi

jason

 

[stangman16]

Congrats, it sounds like you are almost done.

The nipple on the fuel regulator does go to a vac source.

Directly to the upper intake is probably the best place. There should be a couple of locations you can tap into.

Since you are converting to efi, be sure to disconnect that fuel line (simulating wot) when you set/check the fuel pressure.
Pressure should be 38-40psi

jason

Thanks! It's looking as if I'll be done before the end of the month due to time and money.

Could you elaborate on checking fuel pressure? I've no clue on how to do this. What tools do I need to check the fuel pressure, and which fuel line do I need to disconnect? (i'm assuming the supply line)

 

[vristang]

Thanks! It's looking as if I'll be done before the end of the month due to time and money.

Could you elaborate on checking fuel pressure? I've no clue on how to do this. What tools do I need to check the fuel pressure, and which fuel line do I need to disconnect? (i'm assuming the supply line)

On the stock Fox 5.0 engines there is a "schrader valve" on the fuel lines, near the passenger head.
There are some cheap pressure gauges that thread into this valve.

If you are using a stock pressure regulator, then probably don't need to worry about the fuel pressure. Unless you have a drivability issue down the road.
I just wasn't sure if you were using a stock regulator or an adjustable unit.

To check the fuel pressure
start the car and let it idle
disconnect the vac line from the regulator
cap the vac line to prevent a vac leak
check the fuel pressure
put the vac line back on

the most common mistake is to check the pressure at idle with the vac line still attached.

let me know if that didn't make sense
jason