i just did an mpfi swap except now i have a problem ok look i have everything correct on it such as wiring and ecu wiring but it starts up perfect and good but when its warmed up when you rev it up to 3000 rpm some where pass that it sputters out dont know why could it be a the TPS sensor?

 

check your wirirng again you got your tps wires reversed more then likley.

 

any one else can help?

 

is there a check engine light on? i'm almost certain it is the iacv, or the idle air control valve. the same exact thing happened to me after my conversion and swap. the iacv engine code was on, but the wiring was correct. car started up fine, idle'd fine, but when i tried to rev it up, it would sputter and bog. so i decided to run a wire straight to the ecu and it fixed it.

 

limp mode check injector clips