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Did you use the same size(lbs) injectors?
You need to, larger injectors give you what you got now
Fuel injectors also need to match computer, 3.0l Flex Fuel or 3.0l gas only used different computers and injectors
I assume you are getting grey smoke out the tail pipe which means Rich running
Lean and Rich codes don't "mean" engine is/was running lean or rich
Engine pinging means its running lean
Engine blowing grey smoke means its running rich
Lean code means the computer's calculation was lean, or rich if rich code, but at no time was the engine actually running lean, unless you heard pinging
Maybe you got some bad injectors, they are leaking
Do you have a way to test fuel pressure?
2002 system should run at 55psi, then with key OFF should hold pressure above 30psi for MONTHS and MONTHS
If pressure is dropping to 0psi then possibly leaking new injectors
You can also take the air tube off the intake
Cycle key on and off a few times, then off
Then open throttle and smell for gasoline in the intake, should be NO SMELL of gasoline in a fuel injected intake at ANYTIME, its impossible................unless fuel is leaking in