Error Codes P0305 and P0510
 

2001 Montero Sport


Error Codes:
P0305
-- Closed throttle position
I replaced the throttle position sensor

P0510
--Cylinder 5 Misfire
I replaced cylinder 5 spark plug
Replaced spark plug cable
Replaced ignition coil

The engine still has problem . It sputter when going uphill

I need some advice to fix the problem