richie427

Do'es anyone know the psi on the fuel rail on stock injectors, fuel pump?
Just did the test and it was at 51 psi and then it went down to 42 psi in about 5 min. Car was running fine , warmed up fine, on 12/25/15 took her out for a short run, and then, there was no more power. It felt like there was no gas, in the car. Had a family member drop off 2gals of gas started up, but it felt like there was not enough of gas getting to the motor.

UniTink72

I just put a new gauge in my 06. Stays at 58lbs any time the pump is running. Looses pressure very slowly after that, like less than 5 lbs per hour

Unreal

Factory spec is 58psi for c5s and c6s.

RX-Ben

Right, fueling calcs in the PCM are based on 58psi, so it is critical to actually have 58psi at the rails as the PCM is blind to the actual fuel pressure.
Hopefully just needs a new fuel filter.

Unreal

Considering the only filter on c6s is the sock on the end of the pump, I seriously doubt it is a filter issue.

RX-Ben

Not quite, but close, see diagram in this thread:
https://www.corvetteforum.com/forums...in-the-c6.html

If the car was run hard with very low fuel, the pump may be hurt.

Unreal

I don't think that is accurate, and if it is, it isn't serviceable. I've been in a ton of c6 tanks. Unless it is built into the fuel pump assembly, there is nothing there on any 2006+ I've seen.

Edit,
So maybe there is a build in filter to the plastic assembly, but either way you can't do anything about it besides replace the whole assembly.

SlowBusa08

I still don't under stand why there isn't a filter before the motor....

Unreal

Because the modern pumps/filters last as long as the pump in most cases, so they get replaced with the pump every 100-200k miles.