Can the fuel pump on a 2001 Alero cause the fuel gauge to malfuction?
Q. My wife had a quarter tank of fuel according to the gauge, when the car ran out of gas. The mechanic said the fuel pump needs replaced since that is where the sensor is. This si a $700 repair, and he advised that the car will still run without replacing th efuel pump. The gauge just isn't trustworthy. My thoughts are 1) If fuel pump is failing, car won't run for long. 2) Does he know what he is talking about or is he trying to sell me a pump I don't need? 3) Will an error code scan, tell us anything more about the fuel delivery system?
Asked by jbrettlip - Fri Sep 28 09:28:37 2007 - Maintenance & Repairs - 6 Answers - Comments

A. If there was still gas in the tank, and the fuel pump is weak the car would stop running as if the car was out of gas. There is also the chance that when the tank has more gas in it that the pump can overcome a plugged fuel filter. Another thing that can happen if that the in tank filter has become blocked, causing the pump to fail. But if the sender in the tank fails most of the time the gage will read empty. But if the Gage in the dash fails, it may become stuck at any reading. The punch line is this, try replacing the filter first. If you do you may get another couple of years out of that pump. If you decide to replace the pump, make sure that all of the filters are also replaced. If you don't it void any warranty on the pump and I hate… [cont.]
Answered by teamepler@verizon.net - Fri Sep 28 09:41:59 2007

How do you change the fuel filter and fuel pump?
Q. How do you change it? Isnt the fuel pump and fuel filter located in the back of the car by the gas tank?
Asked by cool_teen51701 - Wed Aug 15 08:56:16 2007 - Maintenance & Repairs - 3 Answers - Comments

A. There are few kinds of pumps. The most used ones are the in tank and the in line ones. Without the make and model I can only guess that yours is inside the fuel tank. It is not an easy job for non experienced person. However, here are the steps to fallow, It is better to do it with an empty tank... - Unhook the battery - Open the gas tank cap. - Release the fuel pressure from the fuel pressure rail (There is a valve that looks like a tire valve) - Lift and jack the vehicle up. - Take the wheel off - Put a jack under the tank just to hold this one up. - Take the two bolts holding the two metal straps. - Slowly lower the tank half way. - Unplug the harness - Unhook the fuel line and the air line. - Completely lower the tank. - There are… [cont.]
Answered by Mazda man - Wed Aug 15 09:34:09 2007

How do fuel injectors attach to an intake manifold?
Q. I am making a custom intake manifold and need to attach fuel injectors. Whenever I have taken apart an injected engine the injectors seem to just be pressed in with a rubber o-ring holding them on. I never understood how this press-on system can stay intact with the high pressures in the fuel lines. Is the connection at the fuel rail different than the intake manifold connection? Thanks! Any related info is appreciated.
Asked by J. J - Sun Nov 21 15:01:12 2010 - Maintenance & Repairs - 5 Answers - Comments

A. The injectors need to be attached. The fuel pressure alone is enough to shoot the injectors out of the fuel rail - at least 40psi, many of the modern return-less systems have a base fuel pressure of 58psi. There are a few ways this can be accomplished, but in all applications the fuel rail(s) must be bolted down. A majority of the manifolds have a tapered bore that the business end of the injector sets in, it gets smaller going into the manifold like this: \ / . Others have a straight bore with a stop at the end like this I_ _I . There are a few applications that have a straight bore through to the inside of the manifold, this style needs clips that hold the injector to the rail and the injectors have a pintle cap designed to hold the… [cont.]
Answered by LowFlyin_OK - Mon Nov 22 11:23:15 2010

How can I test a fuel pressure regulator if the car does not start?
Q. I took the car to a mechanic yesterday who said the fuel pump was bad. I'm assuming he said this because there wasn't enough fuel pressure. I am still having the same stalling issues. I have read the fuel pressure regulator can cause this. I have personally replaced alot of other parts to rule out electrical problem. Any advise on how to test the fuel pressure reg will be appreciated. thanks.
Asked by cv7713 - Thu Jul 26 09:43:16 2007 - Maintenance & Repairs - 3 Answers - Comments

A. first thing is fuel injection or carburetor? assuming is FI you have to cut the outlet fuel hose and place a fuel pressure gauge there if it is higher than 20psi then is bad your regulator but... it can be different psi depend on the engine and brand of the car buy the repair manual of your car it should say what is the correct psi at the inlet and the outside fuel line is very weird in FI system get a broken fuel regulator (unless you have work on it) they are mechanical and cant be adjusted so... they will work ever at the same pressure if your car dont start is still an electrical issue
Answered by MazdaTech_PR - Thu Jul 26 10:04:28 2007

If you installed a larger fuel injector in a Ford Ranger truck, how would it affect the mpg?
Q. I am wanting to replace the stock fuel injectors. However, I was wondering if buy a larger fuel injector would lower my mpg or if it would increase my mpg? All information regarding fuel injectors and how they get clogged and fuel economy will be greatly appreciated.
Asked by karate09 - Mon Dec 31 17:39:20 2007 - Maintenance & Repairs - 6 Answers - Comments

A. My personal opinion is it would use more gasoline but on a normal running system, you really wouldn't see the increase per say (as injectors are measured in flow plus how long they stay open).. it would cause the engine to run richer (and try to lean itself out to the point it will set a check engine light on a marginal system) but would it bring economy or power? nope unless you install other gear to help the fuel injectors do it's job as optimized.
Answered by gearbox - Tue Jan 1 21:06:21 2008

how much fuel is consumed during the descending and landing process?
Q. Hi pilots, I'm interested in how long does it take for a B747 to go from cruise altitude, say, 1000m, to touch-down, and how much fuel is consumed during this process? Assume that there is no ATC interruptions, everything goes normal. It will be really nice if you can tell me, at least an estimation, about how long it takes and how much fuel is consumed if you are taking a continuous descend approach from 10,000m. Thanks!
Asked by Mike Mike - Mon May 9 07:21:53 2011 - Aircraft - 4 Answers - Comments

A. A descent from cruise at 10 or 11.000 metres, will take about 2,000 to 2,500 kilos of fuel - Just be aware that airlines generally plan to have their 747 landing with about 10,000 kilos remaining in the tanks after landing (unless of course distant alternate and bad weather considerations) - How much time...? - Just some 30 minutes (or about) from cruise level to touch down on the runway - ATC interruptions...? Well, just be aware that ATC is responsible if most "screw-ups" and "delays" for bad vectors (and holdings) in approaches - So if the 747 burns an extra 1,000 kilos during the approach, that is ATC "extra" - (Maybe a Cessna 172 training on the ILS at 70 knots of speed) - If you analyse the descent… [cont.]
Answered by skipper747 - Mon May 9 08:03:10 2011

What were the main sources of fuel before the discovery and use of fossil fuels?
Q. What are their historical origins? What was the development of man's ability to harness the pre-fossil fuel sources of energy? How did the amount of energy harnessed from these sources compare to what we use today for fuel?
Asked by LibbyLu - Tue Apr 20 17:21:41 2010 - Earth Sciences & Geology - 4 Answers - Comments

A. Don't forget whale oil, 18 century whaling, and their near extinction.
Answered by Ratz - Tue Apr 20 18:52:19 2010

Why does fuel consumption in a typical turbofan engine decrease with altitude increase?
Q. Why is it that when a aircraft is higher up, such as at FL360, it uses less fuel than if it were at FL180. Please note that the engine power setting is the same. Example 65% for both cases. I believe a jet engine compresses air, hence why it is more effective at high altitudes. So if it compresses air before ignition, wouldn't that mean you would still need just as much gas as when you were lower down?---(talking about fuel/air mix ratio here.)
Asked by David S - Sat Jan 12 21:18:34 2008 - Aircraft - 4 Answers - Comments

A. For the combustion inside a jet engine to occur, the mass ratio of the fuel to air (actually oxygen) must remain within a fairly narrow band. As the altitude increases, air is less dense - meaning less mass per unit volume, so the appropriate amount of fuel mass is also reduced. Regarding engine power setting - this is a setting where 100% is the maximum, the actual power (thrust) produced will vary with altitude. For example, a large turbofan may be able to produce 50,000 lbs of static thrust at sea level (FL0), but only 40,000lbs of static thrust at FL200. Jets go faster with increasing altitude (up to a point) due the dramatic decrease in air resistance, which falls off faster than the reduction in power (thrust).
Answered by Nigel M - Sat Jan 12 21:49:49 2008

What could cause my fuel pressure to drop?
Q. I have a 1990 chevy camaro rs. swapped the FI 305 for a carb. 355(bored 30 over). When I swapped engines I kept the electric fuel pump and installed a regulator. My ca kept dying no matter what I did so hooked up a fuel pump vacuum meter or whatever it's called and this is what I found: with fuel regulator on it reads only 1.5 psi while running and drops to 0 then car dies, without fuel regulator it reads 3psi then drops to 0 while running, for everytime I turn the key to on position w/o regulator it raises psi by 3 or 4, if I turn key to on position 3 times it will read 10-12 psi then I started the car and it ran perfectly until it got down to 1 and 0 psi then it dies, the more I rev the engine the quicker the psi drops to 0. So what… [cont.]
Asked by nick - Mon Sep 17 18:57:56 2007 - Maintenance & Repairs - 2 Answers - Comments

A. I would say you need a pump with a higher fuel volume not pressure. You can run 10 PSI but 1 GL per min and 10 PSI 10 GL per min. That is just an example to demonstrate the concept in numbers (no real systems numbers). Do not let the PSIs fool you. You need on my understanding more fuel Volume, no Pressure. There is also a return line back to the tank. If you have nothing to restrict the flow, you will not be able to sustain any volume / pressure. Is like a hemorrhage of fuel back to the tank. The fuel system is like any Hydraulic system or Electric... It will flow through the path of lowest resistance. OMHO I would kept it Fuel Injected, less headaches and tunes better. :-)
Answered by spammer - Mon Sep 17 19:06:30 2007

How much fuel does a large jet aeroplane use during take-off ?
Q. For example, Jumbo Jet. To get from the ground to, say, 1,000 feet, 5,000 feet, etc and to cruising altitude of 35,000 feet. How much fuel used to get to each level, and how much as a percentage of the full fuel load ?
Asked by John S2005 - Tue Apr 15 06:39:04 2008 - Aircraft - 2 Answers - Comments

A. 747 running on GE engines can use up to 32000 lbs of fuel per hour on each engine at normal range of takeoff settings initial climb speed of a 747 is 1800 to 2400 feet per minute depending on load 777's engines for some reason are more greedy at takeoff, maybe its the high bypass ratio but anyways, they drink at a rate of 5000lbs per hour, max, at normal range of takeoff settings initial climb speed varies, but probably like the 747, is around 1800 to 2400 feet/min. jumbo airbuses are slightly more efficient due to the smaller pratt n' Witney engines, but it probably similar getting to an altitude of 35K is harder to say because pilots may step climb, may climb faster or slower depending on ATC, too many variables for me to give you a… [cont.]
Answered by David S - Wed Apr 16 17:10:55 2008

What fuel was used in the Diesel engines when they were recently invented?
Q. It was not a diesel fuel (obtained from crude oil) what was the name of the fuel ?
Asked by OSSAMA - Tue Apr 26 13:54:51 2011 - Alternative Fuel Vehicles - 2 Answers - Comments

A. The Diesel engine was originally intended to run on peanut oil. But diesel fuel was cheaper and produced more power
Answered by bill j - Tue Apr 26 15:13:26 2011

Do you find fuel at different fueling stations are better than others?
Q. If so, which fueling stations do you recommend? I also heard if you re-fuel your vehicle early in the morning rather than during peak hours, you get less air in the petroleum...Is this true?
Asked by mczd - Mon Jun 13 16:24:40 2011 - Other - Cars & Transportation - 1 Answers - Comments

A. In a given area, most of the gas stations will actually be using gas that comes from the same source. Where they differ are the proprietary additive packages that each brand adds to the gas. These additives include ethanol, detergents, and other chemicals that help control emissions based on the season and state the gas is sold in. So inevitably, gas can be a little different from one place to the next. Most gear heads agree that Chevron and Shell have some of the best additive packages. These might not be available in your area, so Sunco, BP, Texaco, and Mobil are also good alternatives. If you care about milage, the ethanol content of the fuel becomes important. A lot of gas sold today contains up to 10% ethanol, which can reduce milage… [cont.]
Answered by Lee - Tue Jun 14 01:16:02 2011

Can changing a fuel filter cause the fuel pump to break?
Q. I know it sounds stupid to me too, but I heard somewhere that if your fuel filter is changed it can break the pump because the pump is used to working with a clogged fuel filter. Is this true? I just don't want to be worried that I could be messing up the fuel pump.
Asked by gatorjay - Fri Apr 11 02:09:29 2008 - Maintenance & Repairs - 5 Answers - Comments

A. No,changing and in line fuel filter will not cause the pump to "break", Its designed as a maintenence item that can be changed at certain intervals. If the fuel pump goes out,it wont be because of changing the filter.
Answered by Joe D. - Fri Apr 11 02:14:09 2008

How do you change a fuel filter on a 1997 Honda Accord?
Q. I have a four-cylinder Honda Accord that needs a new fuel filter. I have the fuel filter, and have been told that it's fairly easy, but I can't find the fuel line under the car. Does anyone know of a website to show me how, or can someone walk me through? Thanks!
Asked by JG - Thu Apr 24 22:08:24 2008 - Maintenance & Repairs - 4 Answers - Comments

A. i blieve you filter is located either under the air filter box or on the firewall near the passenger middle of the engine comartment.
Answered by nicolasblueyes24 - Thu Apr 24 22:12:27 2008

How much fuel pressure should I be getting?
Q. I have an 1989 s-10 2.5l fuel injected. It has the original fuel pump and it is not pumping at enough pressure to keep the engine running. How much pressure should I be getting?
Asked by jcrulz13 - Mon Aug 21 12:53:49 2006 - Maintenance & Repairs - 4 Answers - Comments

A. This depends on if you have throttle body injection or port injection. Throttle body injection usually uses around 16 pounds max. Port injection can go all the way from 32 to well over 100 pounds. You need to call a parts store and find out what pressure your pump is supposed to be putting out. They can look in their fuel pump book and find the pressure rating in the back of the book. Also refer to your repair manual for the proper pressure at the fuel rail if it is port injected. Also check the fuel pressure regulator. Your pump might be working fine but the regulator isn't letting the proper amount of pressure through.
Answered by Thomas S - Mon Aug 21 14:11:23 2006

What would result in no fuel pressure in the fuel rail in a car?
Q. Theres power at fuel pump but pressure isnt being regulated through to the fuel rail. Could the problem be a faulty oil pressure switch or called a restricted fuel line be the problem of that as well as they can cause low pressure?
Asked by Misfire - Sun Nov 22 21:51:04 2009 - Maintenance & Repairs - 6 Answers - Comments

A. Having power to the fuel pump doesn't rule out a faulty fuel pump. A clogged fuel filter or a plugged/crimped fuel line could also be the cause of the problem.
Answered by SSP Bowl Dude - Sun Nov 22 21:55:59 2009

How to release the fuel pressure in a 96 cavalier? for changing the fuel filter?
Q. Hello, I plan on changing my fuel filter and I pulled the fuse out for the pump and it idled for about a half hour and then I had to shut it off because I didn't have anymore time. How long does it take for the fuel in the lines to be burned off after you take the fuse out or is there a different way? Thanks.
Asked by adam2235 - Thu Dec 11 13:10:25 2008 - Chevrolet - 6 Answers - Comments

A. Just start to take the line off and let what's in the line drain out, that's all I ever do. Just make sure to catch the fuel in drain pan of some sort so you don't have a puddle of flammable fuel laying there.
Answered by ryankneale - Thu Dec 11 13:31:14 2008

Would like to know why my car want start after replacing fuel pump,filter and fuel relay?
Q. I have a 1987 Buick Lesabre Custom.I replaced the fuel pump,fuel filter,and fuel relay.After I finish installing all the parts I turned the ignition switch and my car started right up.I did this job Sunday October 22,2006.Since then my car has not been able to start up and the battery keeps running down.Can some one tell me why I am not able to start my car or why the battery keeps running down,The car has a full tank of gas?Never did lose any gas from changing out the fuel filter or fuel pump.I have done what the answers that the guys gave me on this site and My father installed all the parts for me on my car he retired as a ASE Master Mechanic 48yrs as a mechanice and in the business.I went back and check the wiring for the fuel pump and… [cont.]
Asked by Xavier H - Tue Oct 24 13:25:10 2006 - Maintenance & Repairs - 6 Answers - Comments

A. If you checked the wiring and you have voltage to the pump-and its not running -its a bad pump.If it is running-check the pressure relief valve.
Answered by dutch - Tue Oct 24 13:36:13 2006

Why is fuel leaking out the choke of my 1989 camaro when i try to start my car?
Q. Hi, i have a 1989 camaro rs v6 2.8 l fuel injection that leaks gas through the choke when trying to start the engine. If i keep turning the ignition it leaks more gas without me giving it gas. Is it normal to leak fuel if the car isnt starting because battery is low? What can be wrong with it need some help pls. Thanks.
Asked by Mike Alva - Fri Mar 13 17:08:50 2009 - Maintenance & Repairs - 3 Answers - Comments

A. my answer is try to check it out first on auto repair shop...
Answered by alex p - Tue Mar 17 05:12:22 2009

How would you increase fuel efficiency to cars without changing the type of engine or fuel?
Q. The car is the only thing you have to work with/on. Fuel efficiency means higher gas mileage or lower fuel consumption.
Asked by the "eggster" - Tue Apr 28 10:48:12 2009 - Engineering - 7 Answers - Comments

A. You're really cutting out the main factors... but you could also improve this by doing things like - Decrease air resistance/drag by making the body more aerodynamic - Use lighter materials to make the car weigh less, overall - Change the proportion of driving type that is used (highway vs city), not sure if this falls under acceptable answers
Answered by thedude81321 - Tue Apr 28 10:57:50 2009