Zack_532

I need to get out there and see what size lines they are. The top line is the return and the bottom is the feed to the pump. They are twin sidedraft SU's that seem to be in okay working condition. heres a simple diagram to give an idea of what my lines look like The diagram is if you had pulled the tank out and were facing it the way the tank would have sat when it was in the car. There is also my fuel sender unit on the same side of the tank. o<- This is the top line, which is your return o<- This is the bottom line, which is my feed, this is the one that is clogged Also I wanted to mention, that when I got the car, it hadn't ran in 15 years, so the mechanical pump was seized up. It just had a lot of trash in it, and I've got it working like new, but I didn't know if it was strong enough to pull a consistent amount of gas up from the tank without the electric one, which came stock on the car. I am on a budget, but I can make room for extras, or neccesities such as a decent pump or new SS fuel lines if its going to save me a lot of time, pain and suffering down the road.

Have you checked to see that you have fire out of all of your plugs? Are your points in your distributor cap still making a good clean connection? What about your rotor button? Maybe your losing your fire somewhere, if you're getting gas to the cylinder, but no start.

I've got a 1974 Datsun 260Z, and quite frankly its been really pissing me off. All of my fuel pump relays are fried, a lot of pieces are missing here and there, so I'm trying to make it run and drive decent on a low budget. My original fuel pump seized up, so Im having to replace that, and my idea was to buy a universal fuel pump and run it direct with a toggle switch. The only problem is having to turn it on and off every time you go to start or stop the car. I've heard about running it through the fuel pressure switch, but I have no idea how to do this, and I can't find any detailed instructions. I also want to make sure its not giving my carbs to much gas. The sensible thing would be a fuel pressure regulator, but I've been told that if they restrict fuel pressure to much you'll burn out your pump. Another issue is my gas tank. Its got the two welded lines in the tank that I don't think come out. The top line you can blow in and suck air out without a problem, however the bottom line is completely clogged, nothing can go in or out. I was wondering if this was maybe some safety mechanism, or if something might be clogging the fuel lines on the inside? I've got the factory service manual, but it doesn't give me a detailed look on the inside, so i have no clue what might be going on there, any help with the second issue would be greatly appreciated. Back to the fuel pump, I was also wondering if I would have to bypass the mechanical fuel pump in the engine cavity in order to use an electrical one, I'm not entirely sure how high the fuel pressure is supposed to be when it gets to the mechanical fuel pump, so I can't judge whether to bypass it or not. Thanks for any help at all.