Weird electrical issue
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2nd Gear
Joined: Jun 2026
Posts: 2
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From: Cibolo, TX
Weird electrical issue
Backstory bought the FRC a few month back as a non driving vehicle due to clutch issues. Once I got it home I realized it had a tick performance master cylinder that had been over adjusted causing the slave cylinder to fail. Fast forward to last week driving my around and lost throttle response several times through my drive until vehicle shut completely down. Did some research and thought there might be an issue with the fuel pump going out. Changed out the fuel pump and pressure regulator and still having the same issue. I have cleaned out all grounding points and the Vette continues to have the same issues to the point know that sometimes when re starting it when it shuts down the fuel pump will not prime until you turn the key to start it. It does this weak crank multiple times until it finally starts. I have a video of how it starts up. I’m at a loss now need some direction on what I should look at next.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,595
Likes: 4,055
From: Cape Coral, Florida
Without some advanced diagnostic equipment like a labscope you will just be replacing a bunch of parts which seems you started to do...if the car "shuts down" it may be a crank sensor...you will unfortunately get a firm diagnosis here...did you check the FP relay terminals ??..don't know why everyone "cleans their ground points" ??...NOT a ground problem and unless you know what grounds you're cleaning you're just wasting your time !!...watch the video...TEST DON'T GUESS !!
Last edited by C5 Diag; Yesterday at 09:15 PM.
