Hesitation while acceleration, short term and long term fuel

Good morning,

The readings look good. The long term is the key. It should be close to 0. It may roam around 0 plus or minus about 3%.

I would check the fuel pressure. The pump may be draining down overnight losing its prime.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

Roy

How to check this type of fuel pressure regulator? it does not have any vacuum connection . And yes fuel pump does not hold pressure . Can a one way valve can do some? And at idle ltft stays -4.7 and sometimes -6.0. if fuel pressure isn't good then my ltft should be positive I guess.

Okay, if the fuel pressure drops off, it could be either one of the injectors leaking down bleeding off the fuel pressure or it could be the check valve in the pump itself.

The injector rail off as in the picture you see, pressure up the pump with the key on and see if any of the injectors are leaking fuel.

Roy

I already checked the injector by disconnecting fuel rail and key on no fuel drips while in switch on..
And what about long-term fuel trim -4.7?

Okay, then it is the fuel pump itself.

The long term is good. It should be -5 to +5.

Roy

Thanks. so it needs to be changed electric fuel pump motor?

That is correct.

Roy