stock fuel regulator vacuum?

[mk3 bamf]

Can I just run the vacuum line from the fuel regulator to manifold vacuum?
Or does it need to go through the sensor thing.

Thank's in advance

 

[GrimJack]

It should go through the 'sensor'.

The VSV switches the fuel regulator vacuum source to ambient pressure when the engine is cold. So it helps the engine run richer when you start.

 

[mk3 bamf]

Hey thanks Grimjack I appreciate it:biglaugh:

 

[desmd99]

can anyone show me where is the sensor? I have gone to single turbo and did a little piping on the intake and intercooler piping. My gas mileage quite bad.

 

[dbsupra90]

It should go through the 'sensor'.

The VSV switches the fuel regulator vacuum source to ambient pressure when the engine is cold. So it helps the engine run richer when you start.

i was pretty sure it was the other way around. the vsv closes during warm starts to increase fuel pressure to combat heat soak.

desmd-

it is a small round brown sensor under the intake manifold. it has a vac line on each side of it, and a 2 wire plug going into it.

 

[johnathan1]

i was pretty sure it was the other way around. the vsv closes during warm starts to increase fuel pressure to combat heat soak.

That was my first thought as well.

 

[jetjock]

It switches the FPR port to atmosphere. If it switched the vacuum source to ATM that'd be a leak into the manifold. I'm sure that's what Grim meant to say though. Cut him some slack...he's sick

 

[johnathan1]

When does the VSV switch the FPR port to atmosphere? During hot starts?