Need help car running super duper lean!

[brizzle3000]

Okay so back ground...
had a boost leak ( what i originally thought) did the soap test and it failed miserably so i replaced ALL the couplers and clamps on the whole car and checked the intercooler...
After doing all that the car is still running super lean under and serious acceleration... any time the boost gauge hits 0-2 pounds the car boggs like crazy and the AFR maxes out

I'm going to check every single vacuum line tomorrow does anyone have any other ideas what it could be ill upload videos tomorrow

[brizzle3000]

update; couldnt find any issues with the vacuum lines; Idol keeps dropping when going out of gear before returning to normal

[Croustibat]

You still have a boost leak, or your MAF is toast. Maybe the vacuum hose going to the FPR.

If you have a BOV, bin it. They all leak, even more under high vacuum condition (like idle and decel).

Also, fuel pump, fuel filter ? they may be toasted/clogged too.

[brizzle3000]

is there a way to check the fuel pump/ filter??

and what do you mean bin the BOV?

thank you

[brizzle3000]

Actually it's not the filter I changed it to a brand new 300zx twin turbo one not too long ago

[KAT-PWR]

Boost leaks cause the car to run RICH under boost as there is more fuel added for air that is then unaccounted for
Vac leaks will cause the car to run lean at idle/under vacuum

Check your FPR, fuel filter, fuel pump/sock

If it is running lean you should NOT be trying to boost it!

[brizzle3000]

All i needed to do was clean the MAF.... all fixed now