Do I Need A Fuel Cut Defender
Senior Member
Joined: Mar 2002
Posts: 288
DON'T UNPLUG THAT LINE!!! LOL
if you don't get an FCD. chances are you will hit fuel cut. which means the engine will "stop dead" when you floor it, and you'll have to remove your foot from the gas pedal, then push down again to start going again.
if you do get an FCD. you will probably blow the motor from running too much boost LOL... well with the cat and only a drop in you might be ok...
first thing to get is a real boost gauge. 2nd thing is a bigger fuel pump.
then add your exhuast. if it hits fuel cut, buy an FCD, if it doesn't, then there is no need to get one.
if you don't get an FCD. chances are you will hit fuel cut. which means the engine will "stop dead" when you floor it, and you'll have to remove your foot from the gas pedal, then push down again to start going again.
if you do get an FCD. you will probably blow the motor from running too much boost LOL... well with the cat and only a drop in you might be ok...
first thing to get is a real boost gauge. 2nd thing is a bigger fuel pump.
then add your exhuast. if it hits fuel cut, buy an FCD, if it doesn't, then there is no need to get one.
Administrator
Joined: Jul 2001
Posts: 24,416
From: Stuart, FL
Originally Posted by gardonitro' date='Dec 10 2002, 05:45 PM
you dont need to use a fcd. go to the boost sensor and disconect the vacum hose and pluged or put the hose of your gauge inside there. then get more boost and its going to work. i have mine like that n it works.
Thread Starter
Member
Joined: Nov 2002
Posts: 96
From: Sydney, Australia
I have installed a boost gauge and it's running around 8 - 10 PSI. I thought it hit fuel cut the other day but it was just the Intercooler pipe blowing off the turbo!! I **** myself. I don't think it is hitting fuel cut it revs through the range without any hesitation. Should I get a bigger fuel pump just to be safe?. Does having a bigger fuel pumpo mean that more fuel will be injected during the time due to the extra pressure?. Will that prevent it from leaning out?
Senior Member
Joined: Nov 2002
Posts: 602
From: Okinawa, Japan
A stronger pump should not affect the fuel being injected. That's what the fuel pressure regulator handles. With more fuel able to supply the injectors, they shouldn't ever go thirsty.
If you have to think twice if you should or shouldn't, then do it. It's just good insurance.
If you have to think twice if you should or shouldn't, then do it. It's just good insurance.
Senior Member
Joined: Mar 2002
Posts: 288
a bigger pump will add more fuel because the stock FPR is too small and can't bypass enough of the extra. it will also mean it won't run out of fuel and let the pressures drop. the fuel pump is the weakest link in the stock system. good for a max of 250hp. you are probably hitting that at 10psi.
once the pump maxes out, less fuel will get injected.
so you are not hitting fuel cut at 10psi on an S4 ??? weird.. maybe you already have an FCD LOL
once the pump maxes out, less fuel will get injected.
so you are not hitting fuel cut at 10psi on an S4 ??? weird.. maybe you already have an FCD LOL