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Who Is Familiar With Fuel Pump Check Valve Here ? - Car Talk (2) - Nairaland

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Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 3:51pm On Jun 10
HEAVEN4444:
ahh i see. refer to post above. whats your date of birth. i want to see your electromagnetic energy store when you were born
I'll meet with my doctor and do as you've said. By the way, what's the cost of doing an echo scan?
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 3:53pm On Jun 10
Jashub:
I'll meet with my doctor and do as you've said. By the way, what's the cost of doing an echo scan?
in nigeria ? 25000 to 35000
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 3:53pm On Jun 10
Jashub:
I'll meet with my doctor and do as you've said. By the way, what's the cost of doing an echo scan?
whats your zodiac sign ?
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 3:56pm On Jun 10
HEAVEN4444:
in nigeria ? 25000 to 35000
Please pardon my ignorance but is there a difference between an ECG and an Echo scan? Because I think I'm lost here undecided
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 3:57pm On Jun 10
HEAVEN4444:
whats your zodiac sign ?
I've never verified because I don't just believe in such things...
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 3:58pm On Jun 10
Jashub:
Please pardon my ignorance but is there a difference between an ECG and an Echo scan? Because I think I'm lost here undecided
yes an ecg is using the electrical activity of your heart to determine its health and structure while an echo looks at the structure alone through sound waves
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 3:59pm On Jun 10
Jashub:
I've never verified because I don't just believe in such things...
ahh you dont know if you are cancer or gemini or scorpio ?
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 4:04pm On Jun 10
Jashub:
I've never verified because I don't just believe in such things...
you know on second thoughts an echocardiogram may just be a waste of money in your case. are you having severe chest pains ?
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 4:13pm On Jun 10
HEAVEN4444:
you know on second thoughts an echocardiogram may just be a waste of money in your case. are you having severe chest pains ?
Yes but towards the heart. It normally comes as palpitations and I have these strange headaches. Its as if my heart is beating in my ears and head. Its quite terrible
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 4:14pm On Jun 10
HEAVEN4444:
ahh you dont know if you are cancer or gemini or scorpio ?
I don't o. What's that by the way...?
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 4:16pm On Jun 10
HEAVEN4444:
you know on second thoughts an echocardiogram may just be a waste of money in your case. are you having severe chest pains ?
Then there is this dark vein on the left part of my upper arm
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 4:18pm On Jun 10
Jashub:
Yes but towards the heart. It normally comes as palpitations and I have these strange headaches. Its as if my heart is beating in my ears and head. Its quite terrible
there may be a better procedure for you than an echo. its called angiography
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 4:25pm On Jun 10
HEAVEN4444:
there may be a better procedure for you than an echo. its called angiography
All this seems expensive. So what's the cheapest cure to end this nightmare I'm passing through?
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 4:30pm On Jun 10
Jashub:
All this seems expensive. So what's the cheapest cure to end this nightmare I'm passing through?
bro this is heart disease. there is no cheapest cure. to be honest with you, you just need to go see your doctor and have a discussion with him about the diagnosis i gave you. let him proceed from there. PEACEEEEEE BBRO ANDD GOD BLESS AND GOOD LUCK
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by Jashub: 4:44pm On Jun 10
HEAVEN4444:
bro this is heart disease. there is no cheapest cure. to be honest with you, you just need to go see your doctor and have a discussion with him about the diagnosis i gave you. let him proceed from there. PEACEEEEEE BBRO ANDD GOD BLESS AND GOOD LUCK
Thanks
Re: Who Is Familiar With Fuel Pump Check Valve Here ? by adanny01(m): 10:39am On Jun 11
HEAVEN4444:
Well its a valve in the fuel pump that prevents the fuel from returning back into the tank when you switch your car off and so that when next you want to start your car there is fuel waiting ready for you to start it, but if the check valve is bad and all the fuel drains back into the tank ? when you start the car it will take you like 10 seconds before it starts because the fuel has to be pumped from the tank seeing as the one that is normally just waiting to be used has drained back into the tank

anyway so i was running my car on low one day and i think the sediments from the fuel tank has gone on to leave my check valve partially open or something and now the fuel just drains back into the tank and when i want to start the car in the morning it cranks a few times before it starts

so the question is can this debris in the check valve be dislodged by just buying a full tank and filling it to the brim ? so that the submerged fuel pump will release the debris ?

would fuel system cleaner do the job ? they do advertise on it that it cleans the valves.

any car experts in the house ?

Before commenting on your problem, let me add with regards to the check valve.

The valve in a fuel sending unit is not just a simple check, non-return, one way, retention or any other name of the type of valve.

The type used in a fuel sending unit is a pressure regulator even though there is a check valve somewhere to prevent fuel from returning through the pump, i guess that check valve is inside the pump itself. This pressure regulator has 1 inlet and 2 outlets. The inlet is from the pump and one outlet is to the injectors and the second outlet is the return line that dumps excess pressure.

Mechanically, the regulator has a gate with a pressure spring on the return outlet. This gate is forced open by a certain pressure. At the time this gate opens the fuel pump continues to pump fuel keeping that certain pressure constant for optimal working of the injectors. If pressure drops, the valve closes to build the pressure.

This brings us to your problem, you are saying somehow either the check valve in the pump or the pressure regulator is stuck open. Neither of which are impossible but i won't be so quick to say its dirt. Unless you don't have a fuel filter which is located at the fuel pump inlet. Usually, if the filter is dirty, it even blocks fuel flow entirely such that the pump would die prematurely or you loose pressure that the engine will be difficult to start or run properly.

My question is, how certain are you that you lose pressure when you turn off? How did you find that out without a pressure gauge on the line? The fuel pressure regulator is very cheap, you could replace it.

If the pressure regulator is stuck open, chances are that you will have other problems apart from hard starting. You will experience loss of power or stalling with full throttle acceleration which is because you will never have required fuel pressure.

If your regulator is stuck close, the injectors will have too much pressure and will deliver too much fuel or even leak causing high fuel consumption, black smoke, and fuel trims will definitely go haywire.

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Re: Who Is Familiar With Fuel Pump Check Valve Here ? by HEAVEN4444: 1:49pm On Jun 11
adanny01:


Before commenting on your problem, let me add with regards to the check valve.

The valve in a fuel sending unit is not just a simple check, non-return, one way, retention or any other name of the type of valve.

The type used in a fuel sending unit is a pressure regulator even though there is a check valve somewhere to prevent fuel from returning through the pump, i guess that check valve is inside the pump itself. This pressure regulator has 1 inlet and 2 outlets. The inlet is from the pump and one outlet is to the injectors and the second outlet is the return line that dumps excess pressure.

Mechanically, the regulator has a gate with a pressure spring on the return outlet. This gate is forced open by a certain pressure. At the time this gate opens the fuel pump continues to pump fuel keeping that certain pressure constant for optimal working of the injectors. If pressure drops, the valve closes to build the pressure.

This brings us to your problem, you are saying somehow either the check valve in the pump or the pressure regulator is stuck open. Neither of which are impossible but i won't be so quick to say its dirt. Unless you don't have a fuel filter which is located at the fuel pump inlet. Usually, if the filter is dirty, it even blocks fuel flow entirely such that the pump would die prematurely or you loose pressure that the engine will be difficult to start or run properly.

My question is, how certain are you that you lose pressure when you turn off? How did you find that out without a pressure gauge on the line? The fuel pressure regulator is very cheap, you could replace it.

If the pressure regulator is stuck open, chances are that you will have other problems apart from hard starting. You will experience loss of power or stalling with full throttle acceleration which is because you will never have required fuel pressure.

If your regulator is stuck close, the injectors will have too much pressure and will deliver too much fuel or even leak causing high fuel consumption, black smoke, and fuel trims will definitely go haywire.
Thanks for the great enlightenment brother. Its good wisdom and I am sure it will serve me well sometime in the future. Thanks again. With regards to my problem, what you said made alot of sense in that the debris has to go through the fuel filter first and so based on your suggestion i am guessing months of driving on average to low tank ( its a bad habit i have had since i was young because i dont like filling up my tank and letting the car sit there. i just buy the gas according to use. like say i am going somewhere i will buy half tank etc etc. its a bad habit i need to change lol ), so as i was saying i guess months of driving close to the bottom has put lots of debris on the filter and so maybe my problem is actually a dirty filter and not a stuck open check valve.

needless to say what i did yesterday was i took the car and bought a full tank of gas and then drove it back and forth hoping the sloshing fuel in the tank will dislodge any debris from the pump or even filter, and guess what ? it worked. i tried to start the car this morning after leaving it overnight and it started one time no hesitation. normally it cranks 4 or 5 times before catching on. So what do you make of that ? was it a dirty filter or dirt dtrapped check valve ?

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