I think i know the answer to this question , but could wayyy too much fuel cause problems with keeping the car idling? I am running 860cc injectors and a walbro 255 hi pressure pump.I just made a generic base map to start the car up until i can get someone down here to tune it.But the car will fire up and will idle for a few secs then get lumpy and shut off. as far as i saw the pressure stays solid when the car is on. I pull the plugs and of course are black as **** and wet, coiuld the fuel just be blowing the spark out? Hopefully i can get someone down here to tune this weekend hoping this is the prob.but can anyone else chip in?

the other thing that caught my eye now too is that when i let the pump prime the pressure will go to normal and then bleed off. now i did remove all the evap stuff including the charcoal can for the fuel vapors. could that be causing the pressure to die off wuick when in ACC position?

 

def too much fuel. you're fouling the plugs.

 

thats what i figured, i got ne plugs coming in tommorow now hopefully i can get someone down here to work on these maps with me.. i would love to drive it soon or atleast know its driveable soon , lol

would this rich condition also cause the throttle tobe like blippy or hesitant when pressed a little, i noticed this when i tried to give it gas to keep it running

 

yes

 

Having too much fuel will make your throttle seem hesitant. I had the same problem when I installed a FPR, 450's and had wrong VAFC settings that caused a super rich idle.

 

cool , i wont worry much then . i figured it was that , but i get paranoid easily these days.

 

Good to see you kept it!!! You will forget about all of the problems when you start making some power.

-Ryan

 

Also just another note about the fuel pressure falling off when the vehicle is not running. It is normal. Remember the pressure is built by the FPR, and when the pump is running fuel returns through the regulator at a constant pace. When you shut the vehicle off, the pressure will remain built up and will bleed off over time as it drains its way through the FPR.

My GSR will lose about 5 psi of fuel pressure within a minute of shutting it off, and then it slowly falls from there as time continues.