Good fuel flow into fuel pump from tank but very little going to carb.is it the fuel pump

Points to dirty carb... Clean Carb. But first. I know it's new, but is fuel pump pumping? Pull line off pump going to carb, crank engine to see if fuel is pumping out of the port. Is it installed correctly? Center line pulse line securely connected to valve cover or wherever it is obtaining vacuum from. Are you sure pulse line has no breaks, cracks etc.? Then pull line off pump on the tank side, is fuel freely flowing out of line on that side? If all the above test good, then you have a dirty carb, and it needs to be pulled off and cleaned. Have Fun!

The line that is still there is a return to the tank. The other line out of the tank has a filter on it inside the tank. this goes first to the pump then into the carb. Go buy new fuel line for all of it and replace them. The line still attached is the return. The pick up line goes to one side of primer bulb or other. Connect to bulb and pump bulb. if it pumps fuel out of the tank connect the other side of bulb to carb. If not reverse line and try pumping again. If no fuel flow, bulb or check valve may be defective. Depending on the model you can probably buy new carb, pump, and fuel lines for less than $40.

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Going to a carb. engine is a lot simpler then the other way around. The engine with the carb on it also has a mechanical fuel pump.Take the gas line from the tank (the delivery line not the return line) cut it and install it on the mechanical pump. block the return line. Kill the power to the pump in the tank. Change the gas cap use one from a carb engine (if you don't you could create a vacuum in the tank and stop the flow of gas. You shouldn't have to do anything else with the tank the mechanical pump should pull the gas through the pump in the tank if not then you will have to r and r the tank pull out the pump and replace it with a piece of hose going to the bottom of the tank. Next tie back the wiring for the fuel injector system and any other wire pertaining to fuel injection. You should be good to go. Your on-board computer is going to have problems because it no longer receives signals from the 02 sensor but just pull the bulb or put some tape over it.

1.It could possibly be a plugged fuel tank screen or fuelfilter
Motor cycles depend on gravity flow of fuel from the gas tank to the carb so there (in most cases won't be a fuel pump).
2. Check the choke on the carb. Most are automatic now. If it is closed that is ok on a cold day but it shouln't be but only slightly when starting it on a hot day if at all..
3. If the motor is flooded you may want to pull the plugs and clean the excess gas then (easy on a bike not recommended for a car) put the plugs back in and try to start it. If it starts you are probably good to go unless it continues to happen than it may be new fuel pump time.
4. The float in the caberator itself may be stuck or the port that allows the flow of gas into the carb.may be plugged. .
5. Even before doing that Iyou might want to remove the air filter and where you see the inlet to the carb put a little gas to primer it (the carb).
See if the motor will start, If it starts and continues to run it is definately getting gas.
Summary: If it does not start or runs only on the gas you primered the carb with troubleshoot from least expensive to most expensive The best thing to do is start with the hose at the gas tank and work your way to the carb (gas tank to carberator) You might save yourself some money.

The one with the "P" should go to the crankcase "oil Reservoir".
The arrows point to fuel flow from tank to the carb. Generally, the nipple closest to the tank is the feed from the tank to the fuel pump. the other goes to the carb. The fuel filter goes in the line between the fuel pump and the carb. Also check to see if there is an arrow on the fuel filter, if so, it should also point in the direction of flow to the carb.

Most if not all are gravity feed because tank is higher than the carbs. The flow is controlled by a manual on off valve or is vacuum controlled. Make sure any vacuum likes going to the carbs float bowls are not cracked, leaking, or missing. Good Luck, Ned

I suggest that you consider the tank strainer. The test is fuel volume flow... aside from pressure, the duration is over a 2 or 3 minute period. You will need to create an alernative fuel source, for testing, rig up a gravity feed to the carb...

Typically what happens is good flow initially with diminished flow soon, often due to the strainer in the fuel tank. if you find this dimished flow, Some guys blow it off, but the correct thing to do is drop the tank and clean or replace the filter. Good time to flush out the tank. (That is one cool thing about fuel injection, there is much more fuel delivered to the fuel rail, the fuel gets heated and pushed back to the tank. This heats and circulates the fuel, which helps keep the tank and system cleaner.)

Sorry, without a manual on the device that you describe, I would need year and model, however generically, the device that you describe may be a fuel return or a vapor separator/recovery component.

But the clue for me is that the fuel line is dry....l suggest that the volume test will show your issue.

This plugged strainger condition also causes false fuel pump readings, on the 1st step test of a fuel pump. (you always need to volume test the pump also. )

#1.) could just be a fouled spark plug.does your bike spooge alot?( leak black oily stuff from exhaust or muffler?) if so then your bike is running to rich( to much fuel to carb.)which will foul plugs often...#2.) just because you have good flow from tank to carb dont mean its getting from carb to engine you might have a parcialy pluged jet in the carb..( just remove carb take bowl off and clean with can of carb cleaner and reinstall.....If you have spark, the only thing left is fuel delivery....#3.) i left mine outside before and it rained on it and got just a little water in fuel from cap and would not run,had to drain tank and put fresh mix in and she fired right up.....should be one off these 3 things, but start with the plug first fresh mix,and if that dont do it, it will be your carb..

Hello, Im Bobby.

I would start off buy checking the fuel flow to the carb to do this simply remove the line going from the fuel tank to the carb. There should be good fuel flow at the carb with the line removed. It there is lack of fuel there then the fuel filter is pluged or something is in your tank causing the restriction. If you have good fuel flow at the carb then Im going to say there is a blockage in your carb and the carb would need removed , tore apart and cleaned and reinstalled.

The fuel will flow from the fuel tank to the carb, after going thru the primer bulb, it will fill the carb with fuel and then be shut off after the float in the carb shuts off the fuel flow from the primer bulb.
Hope this helps,
Good Luck,
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