Sputtering in 1st gear

[dirtbike_79]

My car sputters very bad in first gear when at wot. I can rev it as high as I was at low throttle but as soon as I go wot then the engine just starts sputtering like crazy. It does not do this is any other gears. Any help to why my car may be doing this would be greatly appriciated.

 

[dirtbike_79]

Also, I wanted to add that the car only builds about 10 psi of boost in first gear and I have it tuned for 20 psi. I know this is normal due to first gear being such a low gear ratio, but could this be causing my problem? Could it be a bad MAF?

 

[Black99gst]

since it only does it in first, i would assume its something simple, run a boost leak test, then check the wiring on the MAFT...

the turbo will contine to build boost in 1st gear, but as the RPMs climb, the engine moves more air, and thus taking more air to make pressure, this is why you only reach 10ish psi in first gear... your doing good with 10psi... i dont get anything over 7psi without 2-step

 

[dirtbike_79]

I have done a boost leak test and there isn't any. The wiring to my maf is correct and I know this becuase I followed vfaq's instructions. Is there anything else it could be?

 

[Defiant]

You shouldn't be winding up in first. Get into second. You're hitting fuel cut. The engine is drawing in more air than the fuel supply will let it have. Don't try it. It cuts it off for survival reasons.

 

[dirtbike_79]

Is there any way I could stop this, or at least make it a bit better. Not being able to go above 4000rpm in first really sucks. I don't have a stock fuel system either, I have a 225lph pump, aeromotive afpr, 650cc fic's, and its controlled by an afc neo.