Fuel pump will not prime - 2004 Ducati Monster 620 Capirossi

If your fuel pump is not priming on your 2004 Honda CBR 1000RR, there are a few things that you can check to diagnose and potentially fix the issue:

1. Check the fuel pump fuse: Locate the fuel pump fuse in the fuse box and check if it's blown. If it is, replace it with a new one and see if the fuel pump primes.
2. Check the fuel pump relay: The fuel pump relay is another common culprit of fuel pump issues. Locate the fuel pump relay in the fuse box and check if it's working properly. You can do this by swapping it with a known working relay, such as the horn relay, and seeing if the fuel pump primes.
3. Check the fuel pump connectors: Make sure that the electrical connectors for the fuel pump are securely connected and free from corrosion. Use a multimeter to check for continuity between the fuel pump and the battery to see if there is an issue with the wiring.
4. Check the fuel pressure regulator: If the fuel pressure regulator is malfunctioning, it can cause the fuel pump not to prime. Check the fuel pressure regulator to see if it's working correctly.
5. Check the tip-over sensor: The tip-over sensor is designed to shut off the fuel pump in the event of an accident. Check the tip-over sensor to see if it's working properly.

If none of these steps help solve the problem, then it's possible that the fuel pump itself is faulty and may need to be replaced.

Reinstall the fuel filter after you clean out the fuel lines. Sounds like something is trapped in the line causing a blockage.

There is no need to prime the pump with anything on a 2007 Grand Prix. The pump is submerged in the fuel tank and will push fuel to the engine without priming.

There is only a few cars fitted with an ancient petrol injection system that needed any priming.

Diesel engines mostly need the injection system priming but petrol injection systems do not.

Lots of cars use a system where the fuel pump runs for a couple of seconds when the ignition is switched on and that is all the time it takes to prime the fuel system. After a couple of seconds the fuel pump switches off and waits to restart when the engine is cranked.

As priming the system takes only a couple of seconds some manufacturers don't bother with the brief priming run of the pump and just have the pump start when cranking.

Could be faulty supply, fuse, pump relay or the pump itself.
If the car is fitted with an immobiliser, perhaps that is the problem.

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the fuel pump don't turn on every time . first when the pump as prime or if system is prime the pump will not turn on
the PCM give a ground to fuel pump relay for 2 sec and while the engine is cranking the pump is running all the time.
but pcm don't prime each time

When you say no fuel, are you indication the fuel pump has no fuel from the vehicle? if so the pickup tube in the tank should be looked at. If you have fuel at the pump inlet, and the pump makes a load clatter whilst priming check by installing a cheap clear gas fuel filter between the pump out and the carb, run the gen to see if the carb is been starved of fuel, if so replace the fuel pump. Anothe rpoint make sure it is an OEM pump as they are low pressure and an automotive fuel pump is too much pressure and can lock the carb and cause dangerous leaks

filling the filters before installing will make priming go more quickly.
once the pump is primed crack open the fuse line at the injector while cranking until you have fuel pulsing out, close it then move on to the next injector.
keep doing this until the engine runs smoothly.
it may start running before all the injectors have been purged so keep clear of all moving parts and a fire extinguisher handy would be a good idea.

It could either be a fuel pipe between your prime pump and injector pump that sucks air so your diesel flows back into your fuel tank. Or you need to replace the prime pump.There is a rubber diaphragm in the prime pump that gets worn. Unfortunately need to buy a new prime pump. A simple sollution is to fit a non return valve to your fuel line. That need to be connected between the prime pump and fuel tank. Hope it helps. Blessings

check the cdi in suzuki when goes bad some times the pump does not work.