Good day all,

I am having some difficulties replacing a rusted fuel line on my Jimmy. It's a 2 door, 5 speed manual, 4x4, if that matters. When attempting to fix the lines, I decided to take it the "cheaper" way and grab good condition lines from a scrap blazer, connected with compression couplings on the line. Got the lines together and started the car, only to see my lines leaking 10x worse than they were before I started this repair. Fuel is spraying out of both ends of the couplings.

I am wondering how much pressure goes through the fuel pump send and return lines above / beside the fuel tank, since I feel that could be an issue to this, considering the compression coupling I purchased are good up to 60 psi.
I did double check the couplings, as they are the correct sizes and put on the proper way. I am extremely conflicted on what to do next, since I do not want to literally blow up my car from leaking fuel lol.

Any tips would be greatly appreciated, as I am trying to avoid buying the lines brand new since it will burn a hole in my pocket.

Thank you all!

 

I've never replaced the fuel lines so I can only offer some broad advice.

When checking to see if there is enough fuel for the engine, I believe that the pressure that we like to see is about 55 psi, pretty close to the maximum rating of the fittings you used. As such, you may need to do some research on how fuel lines are connected using fittings that have a higher pressure rating.

And a big yes to trying to keep fuel from leaking!!!

I did a quick google search and found a full fuel line kit for a 2nd gen Blazer.

If some of your lines have rusted through, it might be a good idea to replace as many as you can, if not all.
https://www.linestogo.com/products/c...-4wd-fl443-b1d