b6t leans out when driving

[koRnhead]

You may want to try closing the gap. Boost could be blowing the spark out.
A soft fuel pump. Bad regulator. Bad ground on the pump. Would be the first things I'd look at. And going back to the stock injectors if you have em. Also how much boost?

[festivBS]

Aiming for 14 lbs on scramble boost and 10 on regular

[koRnhead]

Make a cheapo boost leak tester......many times even when you think you have em all fixed, other ones pop up. It's a vicious circle of boosted cars.

[festivBS]

It has low fuel pressure. What is the solution? I have a walboro 255 and a brand new fuel filter and brand new fuel pressure regulator

[Movin]

If your fuel pressure tester does not have a dead head valve use the hose squeeze in the kit to over ride your pressure regulator, to 100% verify the fuel pump can supply well over the needed pressure. Open the volume port to see if flow meets spec for that pump as well.

[festivBS]

What's the volume port?

[FestYboy]

any good fuel pressure gauge will have a pressure relief valve for using as a volume test port (liter per minute).

[Movin]

I guess you could drink a liter of something so that
you have empty liter,
the pump should be able to fill
the liter in 15 seconds. This is not festiva spec,
it is for anything rated at 255/hr. If it goes over
20 seconds start looking for the reason.

[festivBS]

It definitely stays on for more than 20 seconds.. thanks for the lead

[festivBS]

Just ordered 3/8 stainless gas line with overnight shipping for free going to install tomorrow and if that doesn't fix it, im going to put my fuel pump on a switch.

Ill post update tomorrow

[festivBS]

Install was successful, results were negative. Same low fuel pressure and anything more than partial throttle makes it cut out. No boost leak, or vacuum leak.

The fuel pump is getting 11.5 v and dropping down to 4.5 v

Is it possible that my fuel pump relay is faulty? I hear it click when I turn the key

[FestYboy]

check your grounds!!!!

[Flyin4stroke]

For sh*ts and giggles run a wire from 12v (positive side of the battery) to the positive lead on the fuel pump and drive it. Also throw a good ground on it if you want. No need to keep throwing money at it.

[Rocketman]

Use a new relay near the pump and run a heavy gauge wire w/ fuse... 4.5v is not good

Google "fuel pump re-wire"

[festivBS]

Thanks rocketman! This was what I was thinking to do but I didn't know how to incorporate a new relay. Also, im gonna put mine on a switch so I have a killswitch hidden.
Thanks again!