Replaced the plugs as well.
Intake manifold, throttle body, iacv cleaned for carbon deposits? YES
AC is good. But when this loss of power comes, I have to switch the AC off to make the car move during a climb.
All these problems started to show up once the gearbox was removed to replace some oil seals. After many struggle, I managed to get the car getting full power. But it was only for a month or so.
Recently I have noticed the starting is also a bit jerky as well.
The gears are changing at normal RPM. But my speedo is not working as well. It also happens about 6 months ago.
Engine is not ideling properly when it start losing the power.
Thank you for all your help here.