According to system inspection engine hesitation is caused by fuel system. The purpose of the inspection is to check fuel system.
Check the fuel for excessive water,alcohol,or other contaminations.
Install a fuel pressure gauge.
Engine "ON"
Check fuel pressure of the fuel pressure gauge. (Check fuel pressure at idle, accelerating and stall test)
Specification : Approx. 350 kpa (3.5㎏/㎠, 49.8psi) at idle
(Fuel pressure is kept Approx. 360 kpa (3.6kg/㎠, 51.2psi) after it dropped to Approx. 320kpa(3.2kg/㎠, 42.7psi) at rapid accelerating and stall test.)
Is fuel pressure normal?
YES
Fuel pressure is OK.
NO
Check fuel filter and fuel hose(whether it is blocked or not) and replace fuel pump.
