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Do u know what & where the blockage is? Could be filter, pump, relay etc. Blow out the fuel lines w compressed air, replace the filter. Be sure u have a blockage first, that's odd.
it could be a fuel line blockage. disconnect the fuel line at the pump and see how hard it is to blow air back to the tank. it should not be too hard to do. if this is good then it could be a bad fuel pump. the diaphrams go bad and stop drawing fuel.
take fuel line loose at motor,see if ur getting fuel to engine,have air flow meter checked,throttle position sensor checked,check the fuel pressure regulator also could be bad and not keeping fuel at motor.
Okay, you need to make sure the fuel pump is getting power and that you have the lines hooked up correctly. Also, when you replace fuel pumps you need to remove the air cleaner and use starter fluid to get the engine started.
Disconnect ( or at least loosen) the fuel line as close to the engine fuel delivery system as you can and see if there is fuel pressure. You may have a vapour lock. If you do get pressure how much ? Is it sufficient to supply your requirements. A "new fuel pump" does not always mean a "good fuel pump" - from experience!!! If you do not have fuel at the engine work back to each fuel line connection to were there is fuel pressure if at all. I am not a Nissan expert but the principles are the same for all. You do not say if it is fuel injected or carburated. FI requires higher pressures than carbs. Hope this helps. Let me know how you do in your efforts. Thanks Good luck.
have u checked the connection at the fuel cut off switch, also can u hear the pump running when ignition is switched on if u can hear pump ,check fuel filter for blockages
Do you have more than 4 gallons of gas in the tank? Some models won't **** to prime with less than that in the tank. This is mostly an issue when there is air in the lines. There is usually a screen filter on the pick up, but blowing that out should have taken care of it at least for a few days. Another possibility is a pinhole leak in the line between the tank and the pump. That lets the pump **** air, which will not let it **** gas. There could be a larger in-line filter between the tank and the carb filter. Let us know if you find out what it is.
Check fuel pump pressure and fuel pump regulator. It sounds like you are not getting fuel into the system and if you are you are not getting enough fuel into the system
YOU COULD HAVE AIR IN THE FUEL LINES, I CHANGED MY FUEL PUMP AND FILTER ON MY 6.2 85 K 20 SURB. HAD PROBLEM STARTING IT. DO NOT USE STARTING FLUID. USE W-D 40 INSTEAD, IT WILL RUN ON IT AND PURG AIR OUT OF THE LINES. DO NOT CRANK TO LONG AT ONE TIME YOU CAN BURN UP YOUR STARTER. HOPE THIS HELPS?
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