Questions tagged [fuel-system]

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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3
votes
1answer
3k 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 ...
2
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1answer
2k 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 ...
5
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0answers
55 views

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
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3answers
7k 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 ...
10
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1answer
3k 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 ...
5
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1answer
911 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 ...
9
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1answer
307 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?
5
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2answers
1k views

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
123 views

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 ...
16
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7answers
43k 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
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1answer
1k 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
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1answer
530 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
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1answer
94 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
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2answers
4k 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
499 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 ...
7
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1answer
2k 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 ...
13
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2answers
15k 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
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1answer
1k 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. ...
7
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2answers
25k 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
8k 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
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1answer
1k 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 ...
22
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1answer
27k 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
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2answers
1k 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 Power'...
7
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1answer
74 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
510 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 ...
5
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2answers
1k 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 ...
5
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3answers
4k 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
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1answer
10k 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 ...
2
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3answers
921 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 ...
6
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2answers
28k 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 "...
4
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3answers
22k 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
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1answer
1k 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 ...
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1answer
5k 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
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3answers
3k 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 ...
4
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1answer
221 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
4k 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
76 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
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1answer
1k 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
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2answers
641 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
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1answer
2k 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
705 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 ...
6
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0answers
222 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 ...
11
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2answers
2k 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 rough,...
7
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1answer
13k 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
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0answers
998 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
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0answers
121 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
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2answers
225 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 ...
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0answers
28 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 ...
2
votes
1answer
320 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
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2answers
270 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 ...

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