I brought it to the calibration shop the mechanic said the injection pump is fine, engine running well and no visible smoke.

but he cannot identify the problem so suggested to check the injection pump might be some parts that need to be replaced.

that's my last option.


Earlier today in desperation I replaced the clamps of the fuel hoses going to the fuel filter and sedimenter it seems like

its not that tight. OEM clamps are like clips so i replaced with clamps that has screws. i will give feedback tomorrow.


Thank you to all the advice. .