11
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Why is the effect of a bad fuel pump more noticable at higher speeds?
Background
You asked
Why is the effect of a bad fuel pump more noticeable at higher speeds?
I assume that by 'higher speeds' you mean engine speeds or RPM's.
During high RPM operation an ICE ...
- 33k
8
votes
Accepted
Can't find out a correct fuel pump for my vehicle
It appears there are two pumps which it could actually be. One each for the left and right sides of the vehicle. The part numbers I can find are:
Right side:
Spectra Premium - SP7050M
Bosch - 67774
...
- 153k
7
votes
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Is it bad on your fuel pump to have your tank run low?
Yes, running low on fuel can damage your fuel pump, but as IHaveNoIdeaWhatImDoing mentioned in the comments below, modern fuel tanks are sophisticated enough to prevent fuel pump starvation until the ...
- 6,037
6
votes
Two Fuel Pumps died
Voltage drop the ground side pin 4 with the car running. I'd suspect a poor ground is the cause.
You can also scope the power side by removing the fuse and putting a wire loop in place. Connect a low ...
- 10.7k
6
votes
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Any huge difference between high performance and stock fuel pump?
I definitely agree with Zaid's answer. The stock fuel pumps should work just fine to start and run your car, because all other dodge chargers are still running on the road with the stock fuel pumps.
...
- 1,100
6
votes
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Do worn brushes in an electric fuel pump increase fuel flow rate?
Your basic premise is flawed. Moving left and right on the graph correlates to different flow rates if everything is kept the same while the pressure is changed. The change in power comes from the ...
- 16k
6
votes
Why is the effect of a bad fuel pump more noticable at higher speeds?
It's a demand vs supply deal
The fuel pumps found in most OEM fuel delivery setups today are driven by an electric motor that is running at a fixed speed. This effectively fixes the flow rate ...
- 39.1k
6
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How can I start my lpg toyota Yaris with a broken gasoline fuel pump so I can bring it to the specific repair shop?
Any bodge involving using gravity to feed the petrol to the engine isn't going to work - it's a multipoint electronic injection system running at much higher pressures then gravity would produce. You ...
- 9,989
6
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1996 Nissan Sentra won’t start after refueling
I think you are looking at the wrong area of the car. If the electronics didn't come on, this is an electrical power issue, not a fueling issue. I'd check to ensure all connections are good from the ...
- 153k
6
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Why does the fuel pump buzzing sound go away after a couple of seconds?
Most fuel systems have a pressure-switch. So when the power is first applied the fuel system is unpressurized. The fuel pump is then turned on to build up pressure so the engine can start.
Once the ...
- 12.1k
5
votes
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Can there be 2 fuel pumps in a petrol car?
If the vehicle has GDI (Gasoline direct injection) then yes there will be a low pressure or lift pump and a high pressure pump. One run on 12 volt the other run by the engine.
I don't think your ...
5
votes
How can I start my lpg toyota Yaris with a broken gasoline fuel pump so I can bring it to the specific repair shop?
You won't be able to disconnect the fuel line and pour fuel into the fuel rail because this won't achieve the 60psi of fuel pressure that most non-direct injection fuel injected cars run at. You also ...
- 23.5k
5
votes
Can I mix RON 97 fuel with RON 95 fuel in my car?
Absolutely you can mix different octanes of petrol (gasoline) in your car, it won't hurt your car and you may get better performance with a more expensive fuel. Premium fuels are generally better ...
- 16.2k
4
votes
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Can a Crank sensor cause fuel pump failure?
Sounds strange.
I can understand that the absence of a crank position sensor signal can prevent the engine from starting (the ECU won't allow the car to run without it). The lack of signal could also ...
- 39.1k
4
votes
Is it bad on your fuel pump to have your tank run low?
It is because the fuel lubricates and cools the pump.
If you leave the tank run dry, the fuel pump will turn dry, which will overheat it and may cause the electric motor to fail or otherwise to ...
- 1,739
4
votes
Accepted
2009 BMW 328i Crank but Won't Start
Sorry for the long wait fellas, but after banging my head for a few days, I finally figured out what was the issue. It wasn't injector problem nor the fuel pump. It turned out to be a BMW clamp that ...
- 253
4
votes
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Two Fuel Pumps died
Dirt in the tank could definitely be the cause of the burned pin because the burned pin suggests that the pump was drawing a larger than normal current from that wire. The pump having to contend with ...
- 23.5k
4
votes
2009 BMW 328i Crank but Won't Start
Let's start with some pictures to try and clear up the function of the fuel system.
Both images and a lot of the information comes from here: http://www.aa1car.com/library/returnless_efi.htm
There ...
- 9,326
4
votes
Does fuel pump cover need to be sealed with glue?
It's perfectly fine if you leave the cover as is with slightly imperfect sealing. Even if some water would get to it again (which is not an ordinary event itself) the only bad thing it could ...
- 336
4
votes
Does fuel pump cover need to be sealed with glue?
If it was sealed when you opened it up you should seal it when you close it. Automotive manufacturers don't ad unnecessary steps or materials to their car building processes, so I'd trust their ...
- 16.2k
4
votes
Ford TDCi sluggish until turbo kicks in
I doubt this is an ignition or fuel supply problem, those would have very different symptoms. Turbos are air compressors driven by exhaust pressure, modern ones have electronic sensors that measure ...
- 16.2k
3
votes
Any huge difference between high performance and stock fuel pump?
Aftermarket fuel pumps generally can flow more or tolerate higher pressures depending upon the design of the pump and the flaws in the pump it is replacing. They're intended for aftermarket ...
- 1,935
3
votes
2009 BMW 328i Crank but Won't Start
So, after the edits to the original question, the tenor of the question changed, and a new key piece of information has emerged. Spraying starter fluid into the throttle body gets the engine to turn ...
- 9,326
3
votes
Accepted
Why is a volume test necessary when diagnosing fuel delivery problems?
A fuel pump is designed to provide 3 to 4 times the needed maximum volume of fuel to the engine. The excess fuel is then returned back to the tank through the pressure regulator and return line.
...
- 16k
3
votes
Why is a volume test necessary when diagnosing fuel delivery problems?
Preamble
(Because it's important)
Let's talk about fuel pumps
The fuel pumps found in most OEM fuel delivery setups today are driven by an electric motor that is running at a fixed speed. This ...
- 39.1k
3
votes
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Do I have a fuel pressure or injector problem, or am I just chasing ghosts?
Realistically I'd redo your test using a little more accurate of a timing sequence. Two things to really make it more accurate:
Use some sort of stopwatch (apps for cell phones are free). Doing so ...
- 153k
3
votes
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Does electric fuel pumps run at constant or variable speed?
FPRs with a boost reference port are only used on vehicles with forced air induction (turbo/supercharger) applications to do exactly what you stated. The port tracks when boost is present in the ...
- 153k
3
votes
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New fuel pump, but car didn't start until tank was about half full
Not vapor lock, but air lock. Different principle but the same effect. Air lock will only happen on a new install or if the tank is drained. The working parts of the pump are surrounded by air with ...
- 5,510
2
votes
Should fuel pump noise be changing according to electrical load and RPM?
Your issues may be beyond the fuel pump.
The telling sign of this is that a change in engine load is inducing a change in the noise of the fuel pump.
I assume that your fuel supply system is a "...
- 39.1k
2
votes
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Should fuel pump noise be changing according to electrical load and RPM?
It sounds very much like your alternator is not delivering a constant voltage. It should be able to cope with a change in demand. Check the voltage at the battery with different loads turned on, the ...
- 24.9k
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