Is it possible to prime the gasoline pump without turning the ignition on? Normally, you can turn a keyed car to “on” without cranking, and the fp will prime if necessary.
When you enter the car, insert the key fob and press the ignition button without using the clutch or brake should function similarly to turning a standard key to the “on” position.
Unfortunately, I’ve been doing it consistently ever since I got my car on January 26th, but after 3881 miles, I’ve started experiencing long cranks even on cold starts. you are aware of what that implies! Although I’m not sure if it helps or hurts, it doesn’t hurt to follow the pre-ignition protocol. built in November 2010.
or install the most recent software update, and when the car starts up, it will prime the gasoline system to the hilt.
Is that the winding sound my car makes every time I unlock it? If that’s the case, why does it continue to happen after I lock the car for the night?
Actually, it’s rather bothersome. Even when I go to unlock the boot, my car makes a transformer-like noise. What does it think I want to do, enter through the trunk and take the wheel?
But yes, OP, insert the keyfob, take your foot off the gas and turn on the ignition.
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Nemz
Ask me how I know that the remarks made here claiming that priming is not necessary are false.
I shared this since it’s a requirement when changing fuel filters or performing any work on the high or low pressure side, and it would be helpful to other BMW N47/N57 diesel owners. There is a two-step service feature in ISTA (or any suitable third-party hardware) that engages the low pressure fuel pump and the high pressure pump regulator for around three minutes to clear the low pressure fuel system of air from the tank to the high pressure pump. Start the engine after completing this step; it will take between 10 and 30 seconds for the engine to create enough pressure to run at about 200 bar (particularly if you’ve worked on the injectors), whereas the typical rail pressure should be over 300.
Once the engine is running, engage the second service function to purge the high pressure side for roughly 10 minutes by increasing the engine’s revs to around 2000 rpm. You could theoretically accomplish this and then drive it for ten minutes, but this initial service function must be carried out else the pump could be ruined in a matter of seconds if it runs dry.
The feed line to the pump has a stop valve in it that tries to keep gasoline in the pump if you disconnect it here. However, most people disconnect it at the fuel filter, which causes all of the fuel to flow out of the HPFP because the valve is still open. The biggest danger with the pump is that only one roller bearing is used to actuate the cam that compresses the piston. The pump will lose pressure over the next few hundred miles until it can no longer build enough pressure for steady idling and then to the point it won’t build enough pressure to start, compromising the entire fuel supply, feed & return lines, injectors, rail, LPFP, and fuel tank, which will require replacing in full as it will be compromised. If you get enough metal to metal contact on this bearing and it is scored, the piston and piston walls will be permanently damaged.
Any modern ISTA version is acceptable; for the E series, you should probably use INPA. The download and installation are substantially lower because the programming data files are not required. ENET cable (F series) or K+DCAN are acceptable (E Series – get the one with the switch as connectivity changes around 2008)
For those looking for inexpensive DPF regens, there is a useful app called Bimmer-Tool that will connect to a variety of OBD devices and costs only PS15. As DME faults will prevent the regen from working, this can force a regen with the option to repeatedly remove engine fault codes while you’re driving. Avoid recommending this for a blocked DPF; manual cleaning is needed if the tool’s backpressure is too high. Check that all glow plugs are functional if you’re experiencing DFP problems, as the control unit’s preheating needs to be satisfactory for regens to be planned.
Exactly how do I prime the fuel pump?
- refuel the vehicle.
- In the ON position, turn the ignition key.
- Put the RUN position on the engine stop/run switch.
- Fuel pump should be left running until it stops (about 2 seconds).
- Place the STOP position on the engine run/stop switch.
- Steps 3-5 should be repeated 4-5 times.
How is the fuel system of a BMW primed?
- The optimum procedure for some mechanically fueled engines is to slowly release each fuel-line union nut at the injection pump. Alternately, locate the bleeder screw—which is more of a bolt—which is often found on the fuel-filter housing. A tool is needed to bleed fuel through the fuel cooler in 6.4L Ford Power Stroke engines built from 2008 to 2010. It could possibly be a Schrader valve in the line.
- Turn the union nuts (or bleeders) loosely. Don’t eliminate it or them entirely.
- Pump air into the fuel system through the filler neck using a compressor, or start the engine and then crank it until fuel and air bubbles come out of the bleeder. Avoid cranking the engine too much since this could damage the starter or discharge the battery.
- Tighten the bleeder (union nuts or replace the bolt on a 6.4L’s fuel cooler) once all the air has been removed from the fuel system (there are no longer any bubbles).
- Make an effort to start the car. It ought to start.
Once more, modern rigs—say let’s those made after 2000—are far more self-serving when it comes to priming. Bringing it to the front after adding fresh diesel can be done quickly and without ever getting out of the driver’s seat. After adding fuel, the “how-to” activities are:
- Turn the ignition to the “Run” position and wait 30 seconds before starting the engine to prime the gasoline system. This enables the system to be primed by the pump.
- After turning off the ignition, give the car a 15-second crank. Repeat the first task and this one until it starts if it doesn’t (cycle the key). After numerous efforts at priming the engine, if it still won’t start, stop and try again until it starts.
- Wait once more for a minute before trying again if the engine starts but immediately stalls. Allow the engine to idle for a few minutes after it starts, then check for leaks before starting the car.
- Have the truck towed to a shop or dealership service center if the engine simply won’t start so that the problem can be properly identified and fixed.
After changing, how do I prime my fuel pump?
Turn the ignition key in the car. Turn the ignition to the “on” position with the key in the ignition and hold that position for ten seconds. Reset the switch to “off.” This should be done twice more. This will start the gasoline pump.
What is the purpose of priming my fuel pump?
The fuel pump inside the fuel tank is the most frequent culprit for the fuel system’s inability to maintain pressure to the injectors. When you shut off the engine and let the car sit, a check valve built into the fuel pump is designed to maintain pressure to the injection system. If the pressure lowers, the pump must prime the system to raise the pressure to a level where the engine can start and run. Have a mechanic, such as one from YourMechanic, test the hard start to see whether the pump is defective or if there is another problem, such as a pressure regulator that isn’t holding pressure. The fuel filter should be replaced at the same time as the pump, which is the most frequent component.
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Does my mechanical fuel pump need to be primed?
The fuel pressure produced by mechanical fuel pumps, in comparison, is substantially lower and often falls in the range of 1-4 psi. Second, the fuel system needs to be primed, which entails filling the fuel lines between the tank and the engine.
How is a fuel pump manually driven?
You must first unplug the cable from the pump and then connect it directly to the positive terminal of your battery to accomplish this. After that, connect a jumper wire from your battery’s negative terminal to a ground position on your car. By doing this, the circuit will be complete and the fuel pump will receive electricity.
How can you restart a BMW when the gas tank is empty?
This summer, I’m going on a long road trip. Running out of gas is one of my worst concerns. Despite my lack of experience, I want to bring additional gasoline. How can I restart my automobile when the gas is gone?
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It makes reasonable that you’d be concerned—running out of gas on a long road journey is a terrifying prospect!
If you ever do run out of gas unexpectedly, having extra fuel is a fantastic method to prevent it, but in case you do, here’s how to restart the car:
- Try turning the key to the on position after you fill up the tank. Without starting the engine, this should turn on the electronics.
- After that, turn the switch back to off a few times to prime the fuel pump. By doing this, air that may have gotten into the fuel pump when you ran out of gas can be removed.
- Start the car once you’ve repeated this a few times.
If everything functions properly, you’re good to go. If not, damage could cause your car to stall or struggle.
It’s crucial to remember that running out of gas puts your fuel pump and injectors at risk of harm. It might not be safe to drive even with a tank that is empty. If so, you could require roadside help.
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Which sensor is in charge of the fuel pump?
The PCM receives a signal from the crankshaft position sensor (CKP) when the engine is started, activating the fuel pump once more to feed fuel to the engine.