unstable idle, can't rev high rpm.. need help

[easylife]

idle rpm will go up and down between 1000-1500rpm, sometime ok.
sometime can rev 6000rpm still ok but sometime only 3500rpm and something like fuel cut / misfiring happen.

Can Be O2 Sensor???? Fuel / firing system????

Changed MAF Sensor, Coil, Spark plug & Cable, Distributor.

ECU Error Code: 12, 33 ( if not mistaken)

Sard fuel Regulator , 3.6bar
HKS Air Filter
Bosch HIgh Capacity fuel pump
Apexi N1 Muffler
2.5" exhaust pipe.
Standard ECU
NGK IRIWAY 7

 

[Fast Guy]

33 doesn't exist, probably 34, but I'd check again to make sure.
If the codes come back, obviously the problem is still there. The fault codes mean there is a problem with the component or its' wiring, so if you change the item and the fault is still there, it's probably the wiring.

 

[easylife]

will sent into workshop 2 check by tomorrow.

 

[Fast Guy]

You can do the fault code check yourself with a paperclip. Read the sticky at the top of this section.;-)