2001 Tahoe 5.3L - Stall while driving, starts but doesn't build pressure to run.

[Charles Kazemi]

48 psi at idle seems very god to me. If parked, what is the pressure when rev the engine and can you monitor it while driving. A longer adapter hose to snake out from under the hod and tape to windshield. You may have a problem with the trans???????

Just checked the PSI revved, goes from 48 to just past 50. Supposed to be in the 55 to 58 PSI area?

 

[Charles Kazemi]

Any new codes? Even stored codes? Silly question but how much gas is in the tank?

Half a tank! Lol

Codes are as follows:
O2SB1S1
O2SB2S1

I got some more issues associated to the check that are attached but dont have a code.

 

[Fless]

Just checked the PSI revved, goes from 48 to just past 50. Supposed to be in the 55 to 58 PSI area?

Fuel pressure specs are for KOEO (key on, engine off). But as stated, 48 or so running is good. So before starting the engine, see if the fuel pressure is within these specs for non-Flex V8s:

55 to 62 psi

 

[Fless]

With your code reader can you view short- and long-term fuel trims? If so, let us know what they are.

 

[Charles Kazemi]

Fuel pressure specs are for KOEO (key on, engine off). But as stated, 48 or so running is good. So before starting the engine, see if the fuel pressure is within these specs for non-Flex V8s:

55 to 62 psi

I will give that a shot, thank you!