Crankshaft Position Sensor for a 5.7L help

[Johnson]

Has anyone ever seen the Crankshaft Position Sensor cause the fuel pump to get no power on a Chevy 5.7L motor? I have no power to my fuel pump and I have replaced/checked fuses/relays/oil pressure switch. Any thoughts or help would be great. Also I am not seeing any wire damage that I can see. Tested motor with gas in the intake and it ran so the motor will run but no fuel pump power?

 

[mysterync]

What type of vehicle?

 

[Johnson]

1997 Chevy Tahoe 5.7L motor in my buggy with a painless wiring harness

 

[mysterync]

While I can't tell you much about your aftermarket harness, I can tell you about the factory wiring (in which nothing in relation to the ckp can cause a issue with no power to the fuel pump).
In the factory wiring is a basic relay setup, when testing this type of system you'd expect to see in running conditions 2 12v pins, a ground pin and a load ( the fuel pump) - I'd say your painless is very similar. So start with your relay and check for the basics!

 

[Fabrik8]

The fuel pump needs to have power to start the engine, and the engine needs to rotate to detect most operational crank position faults (except short/open sensor signal), so the crank sensor will not prevent the fuel pump from getting power.

 

[R Q]

Has it ran since being installed in the buggy?

 

[a_kelley]

Check injector pulse. You can jumper the contact side of the relay to see if the pump comes on and if it will start