EVAP/Fuel Tank Pressure Sensor?

SARAANDERSON

MEMBER
2002 CHEVROLET SILVERADO
5.3L
V8
2WD
AUTOMATIC
485,000 MILES

Replaced the FTPS with one off another Chevy tank which was slightly shallower and smaller pump I used the FTPS off it and put on mine. Now no fuel-to-fuel rail. Will that send wrong pressure causing it to fail? And if so, which one is right for my truck?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

No, the Fuel Tank Pressure Sensor is used for the EVAP system and will not affect the fuel pressure, please recheck the electrical connectors and fuses if all is okay it sounds like the fuel pump is no good.

Here is a guide to help make sure and a video of how to change the fuel pump out, I would get an ACDelco unit:

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

Measure with the Key on Engine Off with the fuel pump commanded on.

Vin (V,T,U)
Fuel Pressure (gasoline) .................... 55-62 psi

Vin (Z)
Fuel Pressure (ethanol) .................... 48-54 psi

This is on a similar truck:

https://youtu.be/VuGxQgWDP-0?si=SaRuXMdmJoqzjQ90

Here is how the job is done on your truck in the images below. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)