No Power to fuel pump Help

01-31-2010, 12:31 PM
Ok here's where we are at. No fuel pump signal to the relay while starting. 10.8v between the orange and gray wires on the FP relay connector when ignition switch is in the on or off position but no start. If I jump gray wire at connector with known good 12v supply the FP runs and car starts. When I measure volts between Orange and gray wire with the car running I get 12v. Disconnected the OPSU, 3 wire, red,yellow,black, and tried to start. Nothing. Jumped and measured voltage at red and black wires at OPSU (2.4v) and nothing. Relay is good. FP fuse is good. Where should I look next? Seems like I am not getting a signal to prime the FP.

01-31-2010, 06:18 PM
I had the Same problem wiht my 86 camaro z28 and all i did was take a wire and did quick rig to the bad wire on the relay and mine works fine now i just need to fix the wiring in the future.

01-31-2010, 06:36 PM
how did you rig it?

02-02-2010, 05:55 PM
I took a heavy enough wire and connected it to the battery and then connected it to the fuel pump relay so it only runs when the ignition is on.

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