fuel cut out

[1990talondsm]

I am getting fuel cut at 18 psi. I have 510 injectors and a 190lph pump. I no its a small pump but I did it to save gas. Which one is the problem

 

[dropt4]

What kind of turbo setup are you running?

 

[aaronspeed]

How does a smaller fuel pump save gas? Keeping your FOOT off the pedal saves gas.
Your pump is probably not flowing enough fuel. Do you have a Fuel Pressure gauge or a Wideband?

 

[MrBoxx]

Wow...

Everyone who's posted in this thread so far needs to do a little research on A: Fuel cut. B: Fuel pump sizes for DSM applications. C: BOOST LEAK TESTING.

Here's something to get you started.

 

[freeman 188]

I had the same problem running a 18g at 15psi ,the first thing I changed was my mass air to the gm one ,solved problem for a while ,but then came back ,my air screw some how backed off , put it back to where it should be and problem fixed ,

 

[1990talondsm]

I have an evo III 16g and MBC set at 15psi right now. The problem occurred in fifth were it creeped to about 18. no FPR and have a GM translator.

 

[1990talondsm]

I know that I don't have a boost leak. Since the translator is basically a piggyback could I just turn up the fuel from there.

 

[freeman 188]

do you have a wideband because it is very useful when it comes to how much fuel you have going into your engine ,you want it somewhere around 11.2 to 11.4 ,if i,m not mistaken ,I ran a 50 trim with the stock fuel pump at 16psi last year and it didn,t get fuel cut so I would think your pump should be good,also I would check the spark plug gap .

 

[1990talondsm]

just replaced plugs less than 500 miles ago the gap was good. no wideband yet.

 

[hdoerr]

Please confirm that you are asking 18PSI in fifth gear out of you car?

 

[1990talondsm]

It doesn't creep in any other gear but I wanted to set it higher anyway to 17 or 18

 

[ontario AWD]

Get yourself a logger at the very least.510's on a evo 3 at 18 psi got to be at 100%duty cycle or close

 

[freeman 188]

I was running 18psi on a 20g with stock 450cc injectors and didn,t see fuel cut ,but was told to go with 750,s which I have now ,you need the wideband to find out for sure if your leaning out ,$400 bucks is cheaper than a new motor .

 

[1990talondsm]

I have a data logger. I will look at the injector duty cycle