Sputtering at 1800 - 2200

[jester77]

My 4.0 runs great at idle through about 1800 rpm then bucks and sputters and occasionally backfires till about 2300 rpm??? Already changed coil plugs wires MAF sensor and throttle position sensor.

I’m at a loss- do I throw money at a throttle body or an engine computer???

 

[jester77]

My 4.0 runs great at idle through about 1800 rpm then bucks and sputters and occasionally backfires till about 2300 rpm??? Already changed coil plugs wires MAF sensor and throttle position sensor.

I’m at a loss- do I throw money at a throttle body or an engine computer???

Forgot to say new fuel injectors.
All I can think of is throttle body- computer and I have not replaced the egr valve yet

 

[SenorNoob]

Is this in the 85? If so what harness/ECU did you use for the swap? Any codes?