SR running lean

[PantherRacer]

Hey guys, My friends SR is having some issues and needs some help.

Hey wassup I got a serious prob, I had an exhaust leak that I repaired because my car was running too rich and the car was hardly boosting. so I fix tha problem now and my car is running lean and breakin up in every gear from about 3 to 3.5. The plugs are snow white in all cylinders. I jus recently changed the fuel filter to 300zx fuel filter about 2 months ago. Any suggesstions guys

Also I am on stock boost stop fpr and stock turbo

well I decided to change pumps wit one of my friends who has a skyline gts-t rb20 motor and I put the fuel pump in. the car ran better but still broke up. then this mornin I drove the car when the car was cool I boosted it and the car pulled the whole way through. no breakin up what so ever then like 3 mins later like when it got to operating temp it began to break up and got worse the longer I drove it. I switched out mafs wit my friend and no difference.

[xero1]

can you get codes from the ecm?