I drove my Buick to work a few days ago in great weather. It drove great obviously but wouldn’t start after work. I have an electronic fuel pressure gauge and saw it wasn’t getting pressure... I checked fuse and checked relay with another one... neither were the issue. It had a stealth 340 pump so I put a Walbro 450 along with a new Racetronix sender. Still no peers to the pump... Hotwire is clicking though... I checked the jumper under the hood and there was voltage to it while cranking but I could not run 12v to it and get the pump to run???? What in the world? Injectors are getting voltage.. I will say that there has been something ground related obviously wrong because the gas gauge only sometimes works and even now with the new sender it is pegged all the way to the right... it also bounces when I use the left turn signal? Any ideas? The car is running xfi.
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