I have my 92 that I dropped a fuel pump in about 6 months ago. I've been having some leak issues from the top of the tank. I pulled the tank, put in a new plastic unit from jbg. Well I'm getting the same leak again and I realize now that its coming from the fuel line connectors to the pump. Anyome come across this? Can I replace the tiny o-rings or do I need new fuel lines? I'm assuming its my pressure line not the return. Its giving me my intermittent hard start because I think I'm sucking air in also. Once in a while it will only start if I hold the pedal to the floor, (opening the injectors) I think its air getting in the line. Any ideas or info?e

 

Forgot to mention, I have a pump from a 96 with the updated harness. I wouldn't think it would matter but maybe things changed

 

Well, i think you already have the problem at sight, now i would try turning the truck on and looking under it to see if i can catch the leak.

 

I put the newer fuel pump on my 1990. Pictures posted in My Garage under the DonKo. I would check to make sure the lines are pushed together securely and the clips properly installed. I'm not sure there are o-rings. I had to solder in a new connection for the newer fuel pump. There's also the vapor attachment on top of the fuel tank, but that shouldn't be leaking if you are not overfilling the tank.

 

Would It leak out the top "vent" if I over fill it?? I dont usually but it seems in the past sometimes ill slowly top it off once the pump auto shuts off, I dont recall ever having problems with it leaking before?

I remember last time I pulled it out I looked in the lines and to me on the female side it looked like it had little O rings but I could be wrong it was just a glance....