bad idle

[bgn6er]

needing help with a problem! start car up cold, it start with a choppy idle and it will smooth out and run for about a minute and start back with a choppy idle and shut off. i will try to restart the and it's hard start, it act like it's not getting gas. these are the things i replace(MAAF,O2 SENSOR,INJECTOR AND CHIP FROM TT,ECM) and still having this problem and even used some parts off a running car and nothing changed.

 

[whitehot1]

How many miles are on the car and any mods done to it?

Did the car just start running bad or has it just gotten worse over time?

What fuel pump do you have and how old is it,have you replaced the fuel filter?

What do you have the TPS and IAC set at?