5.3 LS fuel pressure drops/ hard cold starts!

[Efi69Cam]

Originally Posted by Sonar Chief

Efrain ... I listen for the relay every time I start the truck, I don't turn the key until I hear the relay cut off ... it's always come on and clicked off!

I just thought of Auto Zone myself, I really need to leave it at the garage and let it sit overnight and then check the fuel pressure at the rail again.

Michael

I had one go bad, it would click, but had high resistance across the switched terminal. It's an easy check, swap it for another in the fuse box that's for a non crucial function.