fuel cut?? or just not enough fuel

[meyer795]

I have recently upgraded to a full 3" exhaust and blow thru UICP setup. My car drives like shit. It feels like it is studdering whenever I try to accelerate over 5 psi boost. I have a MAF translator and a 3" gm maf. My fuel system is mostly stock accept a slightly more powerfull fuel pump. Do I need bigger Injectors? I am not sure it seems like bad detonation. The EGT gauge show it to be running kinda lean (800 deg C). Any ideas??


It feels like the fuel cut I used to get at about 15 psi when I just started with my DSM

 

[chriss1984]

Did you check for boost leaks?

 

[meyer795]

I did not.
Is this possible with my new UICP?

 

[96gstdsm]

I did not.
Is this possible with my new UICP?

I would be very surprised if it was anything other than a boost leak! I had the same thing happen after installing my hard uicp. I found the boost leak and it fixed the problem 100%. Definitely have that be the first thing you check!

 

[meyer795]

What is boost leak and how can I check if I have it?? Fix it??

 

[Quasimondo]

What are your translator settings? If you set the BASE too rich, that can trigger fuel cut as well.

 

[meyer795]

My translator is set for the smallest injectors, which i believe is the richest setting. right?? Also, with the maf right before the throttle body, why would boost leak matter?

 

[Defiant]

"Fuel cut" isn't a fuel issue. The fuel is cut when the engine is drawing in more air than the ECU thinks its maps can keep up with.

 

[Eastwood95]

Is it idling normal?

 

[meyer795]

Yes it idles well

How do I make it think it is getting less air with the maft? Lean it out?