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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5answers
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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
29 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
43 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 ...
1
vote
1answer
28 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 ...
7
votes
2answers
461 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 ...
6
votes
0answers
40 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 ...
4
votes
0answers
35 views

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
89 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
38 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. ...
5
votes
2answers
200 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 ...
7
votes
0answers
76 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 ...
7
votes
1answer
42 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 ...
13
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1answer
140 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 ...
5
votes
2answers
39 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 ...
6
votes
1answer
33 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 ...
7
votes
0answers
60 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 ...
4
votes
2answers
71 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 ...
0
votes
0answers
20 views

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 ...
4
votes
3answers
71 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 ...
5
votes
1answer
42 views

Inaccurate fuel gauge

Is there anything I can do about my inaccurate fuel gauge? Today it was at the bottom of the red zone, and I put in 9.5 litres and it went up to half a tank, but the tank is 42 litres. I have an ...
1
vote
3answers
62 views

Oil pressure and fuel pressure formula

Can someone give me a formula to calculate Oil and Fuel pressure of a car engine? Consider a small passenger car. I have information like Total distance travelled, speed, rpm, MAF, MAP, Intake Air ...
3
votes
1answer
144 views

additech fuel additives - good idea or not?

When you get gas from a Wal-Mart that has a gas station you can pay extra for fuel additives. $14.99 for a "fuel system service", which is supposed to offer "complete fuel system cleaner", $2.99 for ...
3
votes
3answers
58 views

Leaking gas tank from rust - needs sealed. What materials should I use and how should I do it?

I have a gas tank that is leaking a few drips at a time. It doesn't seem like much of a problem except when the tank is at half full or past, and I can quickly lose 2-3 gallons overnight from the ...
5
votes
1answer
37 views

Motorcycle petcock leaking around bolts to tank

My petcock is leaking I originally thought it was internal do I took it apart inspected all the gaskets and seals and have it a good cleaning after reassembly it was still leaking and after a better ...
1
vote
1answer
52 views

How do I check if I have bad fuel in my car?

I just brimmed my 2003 Opel Agila to the tank (35 litres) with regular unleaded from Tesco (large supermarket). On the way home, it just seemed to be completely gutless, and struggle a lot more when ...
3
votes
3answers
56 views

03 Chevy Suburban Fuel Pump Failure

A few days ago, my dad's Suburban was running while sitting on a steep driveway with a low level of fuel in the tank, and the fuel pump suddenly cut out. Knowing that fuel pumps can wear out from heat ...
2
votes
1answer
35 views

Possible Fuel pump damage

My Toyota Vitz 2007 idles very rough. Sometimes it stalls if I suddenly stop after few miles drive. I took the vehicle to a mechanic and he cleaned up the fuel pump. He used compressed air to clean ...
1
vote
1answer
135 views

Cold weather and gas smell

When told the temperature was going to drop below freezing, I checked my car for antifreeze, made sure there were no liquids inside the cabin, etc. But now, when I start the car, I smell gasoline and ...
3
votes
2answers
53 views

1980 Chrysler LeBaron Failed Emissions Test

My 1980 Chrysler LeBaron (V8 318ci) just failed an emissions test. I'm coming from a state without emissions testing to a state that requires it. Specifically, the only part that failed was the ...
3
votes
1answer
38 views

Car radio cuts out the car will not start

I have a Mitsubishi Gallant-2004. Just recently, while driving, the car radio will cut out then come back on. After about a minute of doing this it will stop working completely. Lights do not dim, car ...
2
votes
2answers
80 views

Is there any protective sealant or bladder within a motorcycle tank?

I am learning metal work and will one day build my own motor cycle tank. Do these have any internal sealing or bladder?
3
votes
1answer
70 views

1995 Yamaha virago 535 Fuel pump problem

On my 1995 Yamaha virago 535, why does the fuel pump click 10 or so times before trying to start? I've replaced the fuel pump and fuel pump relay. It still has the clicking issue and will not start. ...
2
votes
1answer
50 views

2002 4Runner - Smell of fuel by drivers side

I smell fuel off the drivers side wheel well of my 2002 4runner. My check engine light is on and I changed my gas cap. The lights went out and back on. I think it's the connection. It has a cover ...
5
votes
0answers
45 views

1993 Merc 300SE always stalling soon after startup, fuel pressure tests > 50psi

From the moment car starts to the moment engine stalls, which is about 40 - 60 seconds, fuel pressure is always above 50 psi. Can I safely conclude stalling is not caused by fuel system problems? I ...
9
votes
1answer
187 views

2001 Infiniti QX4 rough idle - leaking fuel damper vacuum port

I have a bit of an involved problem, so I’ll break it down a bit and try to provide as much detail as possible. My main problem: I have a rough idle on my 2001 Infiniti QX4. It’s not extremely ...
5
votes
1answer
237 views

Why is there a hissing noise when I open my petrol cap?

When I fill up with fuel, there is often a loud hissing noise, as if you are opening a bottle of fizzy drink or something whenever I unscrew the petrol cap. It also seems like there are vapours ...
3
votes
0answers
74 views

Replace 2009 Cobalt LNF Fuel Tank Pressure Sensor and Shroud

How difficult is it to replace the fuel tank pressure sensor and shroud on a 2009 Chevrolet Cobalt (LNF/SS)? The shop just quoted me over $200 for this. From what I can tell, the parts should be ...
2
votes
0answers
30 views

2000 Kawasaki Vulcan Vulcan 800 Throttle Cuts at High Speeds (85mph+) [closed]

The bike starts fine but it coughs a lot when giving throttle in first gear. Runs great 2nd - 5th but when pushing around 85 mph or more the acceleration quits. The engine is still running but feels ...
5
votes
2answers
66 views

Is it a good idea to top off the gasoline with higher octane fuel in a specific case?

When topping off the gasoline in a vehicle that is rarely driven (100 miles/month), is there any advantage in topping it off with a higher octane gasoline? I've heard stories that the octane of ...
1
vote
0answers
12 views

2009 Volvo S40 sudden thump [closed]

When at constant speed I notice a slight thump. Almost as if for a split second the car lost fuel to the engine then kicks back in. It does not register on the instruments. Also at lower speeds it can ...
1
vote
1answer
55 views

How can I determine if it is more cost effective to run premium fuel in my car?

Every Time I fuel up my car, I collect my odometer reading, fuel price, and gallons pumped. A while ago I drove my car to almost empty and put 93 octane fuel in my tank, ran it to almost empty and ...
2
votes
2answers
32 views

The Ford Emission Control System light remains steady

I drive a 2008 Ford Escape. The Emission Control System Light turned on because I was running out of fuel. I was able to reach a gas station and put some gas but the light remains. Any thoughts about ...
3
votes
2answers
73 views

Proper fuel type for Toyota Prius 2011

I have a 2011 Toyota Prius, and where I live there are only two types of gasoline: 90 and 95 (RON). In the refueling section in the car manual it says: "Use unleaded gasoline. (Octane Rating 87 ...
2
votes
1answer
63 views

How much gasoline fuel to keep in tank of low use vehicle

For a low use vehicle, it was historically recommended to keep the gas tank full. The reasons were twofold: Prevent rust from forming in the metal gas tank Prevent water from forming in the gas ...
3
votes
1answer
77 views

Burn through old gas or mix it?

Vehicle has been sitting unused for 3 months with a half tank of gasoline. Is it better to burn through that half tank of fuel, or mix it with a fresh half tank and burn through that mixture?
2
votes
2answers
73 views

Car wont turn over after trying to get it out of snow

I have a 1998 Mustang V6. Last winter I attempted to get it out of the snow on an inclined driveway. I revved it apparently too hard and the engine sputtered for a moment and stopped. Since then it ...
2
votes
2answers
174 views

Sputtering and jerking while driving

I have a 2003 Ford Focus and it started sputtering a month ago. I've put gas treatment in and if I keep a full tank it's fine, but once it gets around half a tank it sputters. Now it sputters the ...
9
votes
4answers
1k views

How critical is it to match the stock fuel pressure regulator pressure when replacing it?

My fuel pressure regulator needs replacing, however the original part from the manufacturer is outrageously expensive. While looking for less financially painful alternatives I've seen much cheaper ...
7
votes
3answers
1k views

What is the Fuel Tank Ventilation Valve?

Asking this for a friend. Their mechanic says the fuel tank ventilation valve is broken. What is the fuel tank ventilation valve? What does it do? Is it an important part? If yes, Why? EDIT: In ...
2
votes
1answer
14 views

Fuel pipe on 2014 Accord

Had an auto body shop replace rear quarter panel. Gas hose nozzle keeps getting stuck. Seems body shop cut off the top of the fuel pipe, then reinstalled by crimping tabs they somehow created to ...