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Gagliano7

Relieve Fuel Pressure

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I am going to install a fuel sensor on my 2018 Sierra and I was wondering the best way to release the fuel pressure to disconnect the fuel line?There are a few fuses for fuel pump. I figured I would pull the fuses and start  truck to release pressure . Just wanted to make sure this is the best way to do this.

 

 Thanks 

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Depends where you are disconnecting the fuel line. Under truck safety glasses and a rag. But the filter lines are lower pressure anyways.

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Even if you pull the pump fuse or relay it'll still have pressure in it. Already learned that.

 

It's going to spray/leak fuel no matter what when you take the plastic line off the metal line near the tank.

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In the old days you'd take the cap off but we don't have them anymore unfortunately. A long screwdriver should reach down the fuel filler neck to push whatever they are sealing the fuel system with.

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I will be disconnecting plastic line to metal line by tank. I know there will still be gas in the line I figured the pressure would be gone. On my swapped LS in my 1992 pickup I just pull fuse and start it and pressure is gone. I guess I gas shower is in my future.

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Well it wasn’t so bad. Removed fuel pump fuse and the truck kept running. So I also pulled the fuse for FPMP and fuel pump relay(probably didn’t have to do that). Still ran for a while but finally shut down. I was surprised how long it ran with the fuel pump off. Disconnected fuel line by tank and some gas came out but it didn’t spray. I couldn’t do what the guy with the reg cab did for the fuel sensor it would’ve hit the driveshaft. I have a SURR fuel kit I used for my 1992 silverado LS swap do used an elbow and looped it around above the tank. Now I am waiting for a plug to connect to fuel sensor since I don’t want to cut my harness. On my dbl cab the plug for the fuel sensor only has about 8in of slack from the harness. Now I have go to hptuners forum and figure out what I need to program.

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Here is a pic but it is kind of dark. I have a short video but this site won’t let it upload because it is to big even though it’s only 27 seconds 

E5C4403D-774F-4BEC-91A4-4912BD6590A1.jpeg

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