Buzz Posted September 7, 2006 Share Posted September 7, 2006 Hi I have a question,On a 77z which line is the fuel pick up? 3/8 0r 5/16,I've been having the same problem with fuel pumps psi just dropping off. The 3/8" is higher than the 5"16" on the tank.I have replaced the pump,added a inline filter,all new lines,cleaned and sealed the tank,added a return line to keep the pump cool and fuel flowing.I was just wondering if I have the wrong pick up line.seems that the larger one should be the pick up but it's higher on the tank.The old pump was a holly,and I replaced it with another holly.Same problem.I installed a walbro diaphram pump and it seem to work fine untill I let the car sit for about 1 year ,while redoing the engine compartment.I finished reinstalling every thing went to fire it up and had no fuel psi. The Diapram deteriated and filled the electric portion of the fuel pump with fuel,doesen't seem like a good design( fuel and electric)In the same compartment.I just bought a elderblock 120 fuel pump ,which I am installing,just wondering about the pick ups. 77 280 triple webers Mike Quote Link to comment Share on other sites More sharing options...
Phantom Posted September 7, 2006 Share Posted September 7, 2006 The larger line is the pick-up line and the smaller is the return from the pressure regulator on the FI engines. Quote Link to comment Share on other sites More sharing options...
rztmartini Posted September 11, 2006 Share Posted September 11, 2006 if someone were to upgrade the fuel lines, what size would be reccomended for under 400 hp? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.