As you can see in the video, I was trying to accelerate to pass a semi truck on a regular street road and then my RPM started jumping. Note fuel pump, fuel filter have been replaced. Fuel injectors have been cleaned. Throttlebody has been cleaned and the TPS has been replaced. Air filter has also been replaced.

 

Please list your make/model/year/motor etc

 

2001 Chevy Silverado LS 4.8

 

What Diagnostic Trouble Codes (DTCs) are present in the OBDII system?

What is the fuel pressure?

 

there are no codes. I have not checked the fuel pressure.

 

Not to be "snarky" but are you sure there are no DTCs? Have you tried using a different OBD code reader/live data scanner? Sometimes inexpensive code readers will not display codes.

Just because the Check Engine Light is not illuminated does not mean there are no DTCs present in the ODBII system. Also, are there any historical DTCs present?

 

no worries. I am using a cheap scanner. So you might be right. 🤔

 

fuel pressure is sitting at 46 PSI

 

Your fuel pressure is WAY LOW. The factory specification is 55 - 62 psi.

You could perform a fuel pump current draw test to confirm that your fuel pump is on it's way to the graveyard. According to Delphi, an OEM manufacturer of fuel pumps for GM, the average current draw should be between 9 and 10 amps.

When you replace the fuel pump, please do not cheap out and get a no-name generic fuel pump. If you do, you will most likely be replacing it in short order. The only fuel pumps for GM vehicle's I currently recommend are GM Genuine/ACDelco OEM fuel pumps. Delphi and Bosch pumps have become hit and miss in recent years, and you really don't want to have to waste time dropping the fuel tank more than once. Also, the GM Genuine/ACDelco OEM electric fuel pumps come with a lifetime guarantee.

Good Luck!

 

copy that, when i start the truck the fuel pressure is between 46-48 at idling and while driving it goes anywhere between 49 and 52.