Yet another problem I thought I had it fixed. The engine started immediately after refitting the second fuel pump however the idling wasn't smooth. It was shaking a little so they took out the MAF sensor and replaced it with another similar MAF sensor from a similar car and the idling problem went away. So I ordered another MAF sensor but was told if the problem still persist then we will have to look into fuel injections. Hopefully we won't get into that situation. I will update more when the MAF arrive in Brunei.