Fuel system covers the components of a car responsible for fuel delivery; tanks, pumps, filters, pipes. Questions on carburettors and injection systems have individual tags

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Motorcycle dumping gas from tailpipe

I'm in the process of getting my 1982 Honda Magna back in running condition. I've cleaned out the carb and put in a new battery. It now runs, but dumps a TON of gas out the tailpipe. Almost a constant ...
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1answer
24 views

Car sounds and feels like wants to shut off

2000 Mercury Grand Marquis ....... My car sounds and feels like wants to shut off. It started yesterday - I was leaving a friends house and was about 2 lights away from home when i felt this weird ...
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0answers
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Triumph America 2002 running lean on one cylinder

I have a problem with my America 800 it's running lean on the right cylinder and when I adjust the mixture screw it makes no difference. The mixture was checked using an afr meter. The rubbers ...
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1answer
41 views

What is the “Activated Carbon Cannister”?

Why do I have an "Activated Carbon Cannister" in my unleaded/petrol car? What is it's purpose? How does it work? Do I need to do anything to maintain it? I would like a general answer, but my car ...
9
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1answer
73 views

What is the yellow precipitate in my outboard's carburetor?

I've got a 2008 Tohatsu 9.8 HP four stroke outboard. My low speed jet keeps getting fouled and on several occasions, I've found yellow almost crystalline "growths" for lack of a better word inside ...
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3answers
367 views

Direct Injection Injectors - How do they prevent blow back into the fuel system?

So I imagine a direct injection injector as a fuel injector squirting fuel directly into the combustion chamber. The amount of pressure in the combustion chamber would seem to be enough to push the ...
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2answers
57 views

Two Fuel Pumps died

Already having replaced 2 fuel pumps, both died. Seems to have a problem in somewhere (alternator, battery, electricity) or I have no luck for fuel pumps. The last one, last 6 months, before died ...
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2006 Mercedes E350 4matic , v6 engine

Drove kids to school , stop to get ha and made it home then was about to leave back out and the car started to drive sluggish as if it didn't want to do . I proceeded to pull over at a gas station and ...
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2answers
114 views

Is it bad on your fuel pump to have your tank run low? [duplicate]

Ive always been taught it was bad on your fuel pump to run your vehicle tank close to dry as it would damage the fuel pump but Ive never seen any validation to support this statement. So will running ...
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3answers
1k views

Does a carburettor engine apply fuel at high speeds when the pedal is no longer depressed?

There's a question that is pretty similar to this one except the existing question satisfies EFI engines. EFI question Let's say I roll down a hill at a considerable speed I let go of the gas. Say ...
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2answers
688 views

is there always pressure when taking off the gas cap? Does it relate to a full reading on gas guage?

When I take off the gas cap, there is noise from the tank like pressure is released every time. Is this supposed to happen? Would this also affect the gas gauge reading full all the time?
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4answers
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Is there something I can use to replace a fuel gauge sender float?

The little ball that's attached to the fuel gauge sender in my car has a hole in it meaning that the fuel gauge isnt working. You can't buy a replacement float - you have to buy the whole sender unit, ...
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2answers
52 views

Engine sputters when turning left corner

In my 1986 Ford F-150 (carbureted) when I go left around a corner, the engine sputters. Feels very similar to running out of gas, but it picks back up once I stop turning. Only happens in a sharp ...
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1answer
50 views

How can vehicles run on E?

Sorry if this topic is too open ended I'm new to this site. I am studying engines and how they work and I keep wondering, how do cars with no gas still manage to run for a few extra miles? If you ...
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6answers
6k views

Do cars consume less fuel when in Neutral? [duplicate]

Imagine we're going down a hill and we're driving a manual car. There are two situations: If I put my car in neutral it will go downhill without any need for the injector to squirt fuel into the ...
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0answers
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Mazda Familia 1998

I have recently had a fuel/air control part replaced in my car. That was done after replacing plugs etc. The problem it had was it was sacking really hard but going nowhere, once I got past 1st gear ...
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1answer
39 views

Need explanation on Commanded EGR and ethanol%

There are 2 PIDs listed in this Wiki page - Commanded EGR and ethanol%. I have tried getting the values from some cars but have not succeeded. I am curious to know what do these 2 PIDs mean? Can ...
8
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2answers
365 views

Why is the engine on my Royal Enfield Classic 350 shutting down?

After travelling 7-8km on my Royal Enfield Classic 350, the bike acts as if the fuel is finished & the engine shuts down, but it starts again when I pull the accelerator. What could cause this ...
3
votes
1answer
34 views

keep getting air in the fuel line

I put 17 liters of petrol in my Renault kangaroo it already had 8 liters of diesel in it had it drained by mechanic put 12 liters diesel in it took a while but did start and run well until I got 3 ...
4
votes
1answer
45 views

Lean Fuel Code on V10

I have 1999 V10 Ford chassis on a 2000 Coachman motorhome. Engine starts great when cold, runs great, idles great, no skipping, missing, etc. Problem is that after driving more than 30 minutes or so ...
6
votes
2answers
98 views

What is a safe procedure for replacing a fuel filter on a 2000 Toyota Camry?

I bought this 2000 Toyota Camry from some very nice folks who cannot even spell "maintenance". So I need to replace the fuel filter as no one knows when it was last done. What I would love to know is ...
3
votes
2answers
79 views

fuel system problem

I have a 89 camaro I personally don't think it's a fuel pump issue and I recently changed the relay, but whenever I turn the key over sometimes I hear the fuel pump turn on sometimes I don't. Could it ...
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1answer
40 views

Fuel lines: is Nicopp OK for gas?

I need to replace some rotted under-body lines. I'd like to use something easier to bend than old-school steel tubing - in particular, AGS' Nicopp. At that link, the blurb for Nicopp line doesn't ...
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1answer
44 views

replaced fuel pressure regulator, still having same issue

My check engine code led to me to replacing my fuel pressure regulator on my 2004 Ford Freestar. I had the same issue a couple years ago, so I was familiar with the replacement process. After ...
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0answers
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No fuel pressure

97 Ford f350 7.3 turbo with duel tank set up ..... I need to know a few things. 1) what can cause no fuel to pump into the fuel bowl, other than the camshaft and the mechanical fuel pump? 2) with a ...
3
votes
3answers
184 views

2004 powerstroke white smoke now no start

I have been trying to fix my truck for a while so long story. I need help bought a 2004 power stroke with 100k miles. It ran well for 15k miles then started having low power for first few minutes to ...
7
votes
1answer
98 views

Is it really not advisable to let your fuel tank get low on fuel?

I have frequently heard people blaming engine problems on letting the fuel in the fuel tank get too low, in so doing allowing sediment to be sucked into the fuel pump, which then causes a blockage. I ...
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1answer
41 views

Re: Dry Gas (specifically STP Water Remover)

Well, it's butt cold here in Maine & my car wouldn't start. It has a 1/4 tank of gas & I was unable to add 1/2 bottle of dry gas as it comes out very fast. So despite the directions on the ...
7
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1answer
35 views

Lada Niva 1700 Carburetor Model

The compression is good and does not burn excessive oil .Fuel consumption has dropped from 8 kilometers per liter to 5.7 kilometers per liter.Same driving cycle same location. What should I look for?
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2answers
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What is the difference between “multi port” and “combined port” fuel injection?

I have heard these terms tossed around quite a bit and I understand that fuel injection is needed in order to inject fuel in to the engine (from a fuel rail/injectors?). What is the difference ...
5
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0answers
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what would cause lack of movement in the gas pedal, causing slow acceleration? [closed]

I have a 2002 Hyundai Elentra. Until yesterday every thing was fine. Yesterday I noticed the car was not accelerating normally. I also noticed my gas pedal basically had almost no movement. No ...
14
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5answers
805 views

How exactly does running fuel-lean increase the temperature of ignition?

I learned in this question that running an engine fuel-lean will increase the temperature of ignition, among other things such as causing problems with the catalytic converter. I have no idea how or ...
7
votes
1answer
59 views

Vespa PX 150 Fuel and Carbon issue

I am using Vespa PX 150.It is using Contact Point system. The issue is it is consuming fuel more than average and the plug is full of carbon after approx 50 Km.The engine not start unless I clean the ...
6
votes
1answer
60 views

2000 Celica engine dies or shakes when I pump gas

I have a 2000 Toyota Celica. At first it used to slip gears and then I had a mechanic check it out. He said its a solenoid in the transmission which he changed. The car sputters sometimes when at ...
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1answer
70 views

Water Powered Cars - What are these things?

Whilst looking up the answer to another question using Google regarding the water output from a normal internal combusted engine powered car, I noticed that - to my surprise - all the top hits were ...
8
votes
2answers
506 views

Why is the effect of a bad fuel pump more noticable at higher speeds?

I get that the main effect of a bad fuel pump is that the engine will cut out at higher speeds, and that this is often not easily noticeable until that happens because there are little or no prior ...
9
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1answer
78 views

Ford Tractor 5600

This is a older tractor. My question relates to the fuel system. The older fuel injectors don't have any external seals? All of them seat and 3 don't leak but one does. I was looking for a seal but ...
5
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0answers
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2009 Hyundai Sante Fe - gas smell in cabin after replacing fuel sending unit. has been repaired 4x's now

Fuel sending unit replaced. Since then it has gas smell in car. It has been redone by mechanics four times now but still has a gas smell when the gas level is in the first quarter of the tank. Cap ...
10
votes
1answer
209 views

Why do diesel fuel lines have to be bled?

Background I've had a couple of situations with diesels. One in particular where I swapped a Ford F350 Powerstroke 7.8 transmission. When I was done. The truck wouldn't start. It was a painful ...
5
votes
1answer
104 views

BMW E60 (525d M Sport 2005 UK). Cranking but not starting. Fuel Pump/Relay issue?

Background: Long term bad earth problem has been causing iDrive to crash and reboot for years. Bad earth seems to drain the life of the battery over a period of a few years. On my 3rd battery now. ...
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votes
2answers
307 views

What are all the different types of fluid in a car and a short summary of their use?

A fluid is defined as anything that flows, hence for our purposes a gas or a liquid. I know that there is fuel, engine oil, engine coolant and brake fluid. Also air is normally taken in through a ...
10
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1answer
183 views

Leaking Fuel Injector Seal

I recently had to remove the fuel injectors and fuel rail to clean out the EGR ports on my Honda Accord. The EGR port was all clogged up with carbon build up. I replaced all the old o-rings, cushion ...
8
votes
1answer
55 views

Suzuki 2004 sv650s wiring

I got a 2004 sv650s Suzuki when I turn the key on the fuel pump does not come on and the CHECK light comes on on the dash. All the lights come on and the starter button does not work.All the fuses are ...
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1answer
547 views

LTFT and STFT values are off and don't make sense

Car is a 2015 BMW M5 and it has an aftermarket CAI and a catback (slip on) exhaust. No other performance mods or tunes. About 6-7 months ago, I bought a Kiwi OBD-II reader, simply out of curiosity ...
6
votes
2answers
59 views

Calculate amount of fuel injected

How do I calculate the amount of fuel injected (both gasoline and diesel cars). I want an instantaneous value. http://www.rceng.com/technical.aspx Websites like these ask for 'Desired Crankshaft ...
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votes
1answer
35 views

2010 dodge ram 1500 reg./E-85

I let my wife put gas in the car and she thought it was E-85. But she put eco-diesel gas (only) 5.00 dollars worth so my guess maybe 2 gallons now my truck smokes a lot and wants to shut off. I bought ...
10
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1answer
136 views

Sharp whining noise coming from rear of the car

In my Toyota Vitz 2007, I hear a sharp whining noise coming from the rear of the vehicle. This noise does not always happen. When the vehicle is started, the noise is not there. But after driving for ...
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votes
2answers
100 views

Do I need to eliminate old gas before changing fuel injectors?

I have a truck with a full tank of gas (12-16 gallons?) that's been sitting for 12 months and I'm about to change the fuel injectors. The truck can barely make it around the block due to stalling out ...
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votes
0answers
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Is it necessary to do '3 part fuel induction system service' when replacing Spark Plugs?

I got engine light on. MIDAS told me I need to replace Spark Plugs ($300) and do '3 part fuel induction system service' ($100). I asked if we can stick just with the spark plugs replacement and was ...
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3answers
102 views

Why is a volume test necessary when diagnosing fuel delivery problems?

I suspect my fuel pump causing intermittent driveability issues. I checked the fuel pressure at the fuel rail and it seems like the pressure is fine: ~2.4 bar at idle, 3.1 bar at engine off (3.09 bar ...