Chevrolet Forum - Chevy Enthusiasts Forums

Chevrolet Forum - Chevy Enthusiasts Forums (https://chevroletforum.com/forum/)

- 1999 - 2006 (GMT800) (https://chevroletforum.com/forum/1999-2006-gmt800-108/)

- - Trouble starting (https://chevroletforum.com/forum/1999-2006-gmt800-108/trouble-starting-115929/)

Chris staehler

March 10th, 2024 3:02 PM

Trouble starting

My 99 2500 gmc starts first thing in morning but as the day goes on it has a trouble starting. If I pump the gas pedal a few times it start but struggles. What could be the reason/ cause for this?

chem_man

March 11th, 2024 3:28 PM

What engine? Are there any Diagnostic Trouble Codes in the OBDII system?

Chris staehler

March 11th, 2024 10:24 PM

Codes

Had o2 heater bank 2 sensor 1and sensor 2 changed those out and changed the fuel filter out and still does it.

Chris staehler

March 11th, 2024 10:25 PM

Has the 6.0 in it

chem_man

March 12th, 2024 12:55 AM

Check the fuel pump pressure using a fuel injection pressure gauge, and also check the fuel pressure regulator - pull the vacuum line off the nipple and see if gasoline runs out of either the fuel pressure regulator or the vacuum line. If you get fuel spilling out then you need to replace the fuel pressure regulator.

All times are GMT -5. The time now is 2:52 PM.