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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1answer
917 views

In Tank Fuel Pumps Pros and Cons [closed]

In-tank fuel pumps are common in cars these days. I was first aware of this in 1985 on a Ford Telstar when it was relatively exotic. I have been told that it keeps the electric pump cool and quiet and ...
3
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2answers
145 views

Is it OK to use Redex fuel additive in winter?

We're currently in a typical chilly spell here in the UK and I've got a bottle of Redex fuel additive sitting in my cupboard, like this one: http://www.halfords.com/motoring/engine-oils-fluids/fuel-...
4
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1answer
930 views

Do injectors leak or injector seals leak?

Car: Audi S5 2008 I have a problem in my car where sometimes my car will be hard to start after driven for a while. Normally if I floor it close to where I stop the car, it's harder to start. When I ...
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0answers
46 views

Loss of current to fuel pump

There is no current coming to the fuel pump in my 1997 toyota corolla. Only the ground wire has current. The other wire does not have current so what is the cause of this lost of current and how can I ...
2
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1answer
1k views

What's the risk of not changing out a fuel pressure regulator?

I have a bad fuel pressure regulator. Our car (usually) starts, though occasionally it's a little grumpy about it or it takes a bit of cranking. Changing the regulator takes a while for a Chevy ...
3
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1answer
81 views

Fuel Pressure Regulator, or something else wrong in my 1997 Chevy Suburban?

I have a 1997 Chevy Suburban and I'm pretty sure that the fuel pressure regulator valve is going/gone. Or maybe it's just the elevation. We recently had the water pump and the front intake manifold ...
6
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1answer
807 views

Fuel Pump Suction Performance

Electric Fuel pumps and mechanical fuel pumps are well specified when it comes to pressure and flow rate .Reputable manufacturers provide a curve of pressure say PSI Vs flowrate say Gallons per hour. ...
5
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1answer
221 views

Do I have a fuel pressure or injector problem, or am I just chasing ghosts?

I just did a fuel volume test on my 98 Mazda 626 2L GF. According Tim Giles book Automotive Service: Each injector is energized for 15 seconds... Variations of more than 5 ml calls for replacement ...
2
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1answer
41 views

Alto LX erratic start up behavior

I have been facing a start up problem with my Maruti 800 LX recently. I have changed the distributor, spark plugs and also replaced the battery. Any recommendations?
3
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0answers
18 views

No start on 2002 GMC Savanna 1500

When I try to start it it will not start I was told to push the gas and it doesn't do anything at all. I replaced the alternator and got a new battery. We have been having this problem for over a ...
5
votes
1answer
76 views

Possible clogged injectors?

For the past year, my 2010 Hyundai Tucson has intermittently (1-2 times a month) had "hesitation" problems where pressing the accelerator doesn't increase the RPMs - usually within 2 minutes of ...
3
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1answer
729 views

Do fuel pressure regulators allow some fuel to flow even when not turned on?

I'm completely rewriting this question since I really wasn't clear before. When discussing a fuel system with a return line and a vacuum operated fuel pressure regulator such as this: Where it says "...
4
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1answer
187 views

Can I replace my TR7 carb mounting rubbers with nylon?

Recently, an air leak introduced itself in my Triumph TR7. After some playing with soap and propane, I found out the leak was from the rubber carburetor (SU HS6) mounting plate. As with many things on ...
4
votes
1answer
313 views

Can't get a fuel pressure reading

I wanted to test out my fuel system components on my 98 Mazda 626 GF 2L, so I hooked up my fuel pressure gauge between the fuel filter and the fuel rail. I've used this gauge on this car before, and ...
8
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3answers
3k views

What could be causing fuel pumps to die?

I've got a 1993 Mk1 Golf/Rabbit Cabriolet that I picked up as a project car. When I first got it the lifter pump was dead so I replaced it. About 6 months later, the main pump died and was replaced. ...
6
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2answers
6k views

Properly draining a motorcycle carburetor

How does one properly drain a motorcycle carburetor and ensure that no additional fuel drains into the fuel bowl(s)? I opened the two draincocks seen above the choke in the photo below, but even after ...
7
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1answer
2k views

Fuel Trim Readings

I have a 2002 Toyota Corolla (1ZZ-FE engine) and I am trying to understand the fuel trim values I am getting in real driving conditions from my scan tool. I have P0171 code (lean condition) that comes ...
3
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0answers
391 views

protect gas lines from corrosion?

'07 Cobalt, electric power steering, 50K miles Snow/slush/salt area. The car (new to us) hasn't had a lot of winter miles, so it's in not-too-bad condition. However, underneath today, I saw that ...
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0answers
200 views

2011 Chevy Malibu ltz gas intake issues with check engine light

The Check Engine Light came on and diagnosis came back. It has to do with the gas tank intake, it does not want to take gas when refilling the tank. It takes some then quits. It take 30 minutes or ...
2
votes
1answer
94 views

How Long to Power the Injectors for a Fuel Pump Volume Test?

I want to do a fuel pump volume test on my 98 Mazda 62 2L GF, but the WSM doesn't say how long to energize the injectors: I'll probably activate the injector by back probing the injector ground wire ...
2
votes
1answer
186 views

Why Ride by wire when the fuel injector is there

I feel confused on understanding this system on 1. The difference between FI and Ride by Wire 2. how it improves the fuel efficiency when compared to the ride by wire system and conventional ...
2
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0answers
132 views

Fuel system hose routing - Triumph Bonneville

Can anybody help? I'm putting 2005 Triumph T100 Bonneville back together. I seem to have got confused with the hoses from the carbs and petrol tank and the tip over hose. Anybody know of a drawing ...
3
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2answers
855 views

2005 Dodge Grand Caravan sputters & stalls after refueling

I fill my tank at 3/4 or 1/2 full and every time it sputters and stalls immediately when I leave the pump, just like so many other Dodge & Chrysler minivans I've recently read about. So, before I ...
3
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1answer
294 views

1994 Chevrolet S10 2.2L LS pickup - gas smell when starting

Engine has just been rebuilt. Replaced the fuel filter, gas cap, and EGR as well. I can smell gas outside when starting and when shut off. There are no visible gas leaks coming from the gas tank. ...
4
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0answers
195 views

Why does my car stutter and sometimes die at low RPMs, but only when the fuel tank is full?

My 2005 Chevy Malibu has a very strange problem, it sometimes dies at low RPMs, but only when the fuel tank is full. The problem goes away when the tank drops to a little bit above the 3/4 mark. I've ...
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0answers
74 views

About Hyundai Atos 1998 1000cc fuel

What is the right octane number of fuel suitable for car Hyundai Atos 1998 1000cc, 80 or 92?
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1answer
19k views

Car can't speed more than 100km/h

Last few weeks I get back from my hometown which is 200km in distance. For the 1st hour I travel using federal lane where I only speed less than 90km/h because of traffic and to avoid speed trap. As ...
2
votes
1answer
60 views

Compatible fuel tank 2005 Smart ForFour

I just bought a 2005 Smart ForFour 1.5 CDI (70kw/95hp). Unfortunately the fuel tank is leaking but the previous owner agreed to pay for the repairs. The problem now is that this part is no longer in ...
6
votes
1answer
758 views

How to install a Low Fuel Light and a Seat Belt Light?

I have a FAW V2. In its dashboard (meter), there is a Low Fuel Light and a Seatbelt Light, but they do not light up. While investigating why they weren't lighting up, I discovered that the FAW V2 ...
2
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0answers
41 views

bleed fuel system mercedes 364 engine

Following an engine rebuild, do I need to bleed at the injectors once fuel is at the filter? If so, how is this done?
5
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4answers
318 views

Why isn't injection managed to use the entire intake stroke?

As far as i know, electronic fuel injectors only know two discrete states, on or off. Under light load (ie. low rpm and throttle) the injector doesn't have to deliver much fuel. So naturally the ...
8
votes
3answers
24k views

Best way to repair a rotten fuel line?

I believe the feed line in my fuel system has rotted. If I'm going to cut out the rusted areas and splice a new line in... Is it best to flare a hardline? Is steel the OEM material? How would I ...
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vote
2answers
848 views

Anyone use a custom fuel line repair kit from eBay?

My fuel line has started leaking and needs to be replaced. I saw a YouTube video of someone who used this 96-00 Civic 2dr Coupe Replacement Stainless Steel Fuel Feed Line & Rubber Return from ...
5
votes
1answer
188 views

Can I put E10 unleaded fuel in my 2004 Ford Freestar 4.2L?

I live in The Netherlands and have an imported Ford Freestar 4.2L from the USA. This car is unknown in Europe and I can't find any info about this car over here. Can I put E10 (10% Ethanol) unleaded ...
2
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0answers
310 views

Air Bubbles in Fuel Lines of Peugeot 206 HDI

My car cut out while driving. It wouldn't re-start and was showing signs of no fuel. The car was taken to a garage and after 20 minutes, the mechanic said there was air in the lines. He very quickly ...
4
votes
1answer
97 views

Added two stroke oil to my gas. Now what do I do?

I have a 1996 vortex engine. I added marine two stroke oil to a full tank of gas in my truck. Now it won't start. I'm not sure what to do. Can I save my engine and get the truck started? What ...
13
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8answers
3k views

What causes a 20% difference in fuel economy between winter and summer?

I've been keeping track of the fuel my car, a Ford Fiesta Ecoboost 100 hp, uses since the day I got it. In the last three years I've owned it, I've noticed a large (>20%) difference in fuel ...
3
votes
1answer
136 views

Why do injector prices vary so vastly?

I'm gathering components for my setup, and at the moment I'm looking for injectors. Those things go from $8 at AliExpress to $150+ per piece at the "genuine stealership". One thing really ...
13
votes
2answers
1k views

How to determine injector size for custom engine?

I've got a 2.5 L engine here for which I do not know the performance specs (yet), because it's customized. I need to select injectors for this build, but there seems to be only one equation on the ...
2
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0answers
104 views

When I shut the bike down there is horrible fuel smell

2003 Harley-Davidson FXDL. After I shut it off, I get this horrible fuel smell. The bike has Mikuni 42 carburetor, Pingel shutoff valve, carburetor rebuilt, Pingel holding strong. I do not have the ...
6
votes
1answer
675 views

1998 V6 Mustang -20+ LTFT on both banks

I just finished doing a bunch of work on my Mustang (replaced all gaskets down to head gaskets on engine, had the heads milled and a valve job done, replaced all the fuel injectors, new fuel injector, ...
2
votes
1answer
195 views

Control module voltage

I obtained some readings using PCMSCAN for a 2007 Pontiac Wave(Codes P0171 & P0172). At idle SAE.VPWR recorded 14.229v, frame 3&4 was 57.825, frames 5-33(varied rpms) around 14.4,frame 34, 37 &...
5
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1answer
1k views

What are the consequences of driving a car with a fuel filter installed backwards?

I changed my fuel filter today and noticed that the previous filter appears to have been installed backwards. I've probably been using my car for a few months with the fuel filter this way. What are ...
7
votes
2answers
4k views

How do I know which fuel line goes to the engine and which goes to the fuel tank?

I changed my fuel filter for the first time. I have a 2004 Toyota Tazz 1300. I have installed my new fuel filter. Here it is: And this is my fuel filter zoomed in: I have assumed that the tube on ...
2
votes
1answer
226 views

Can not fill gas into tank for 2004 Honda pilot

My 2004 Honda Pilot has a gas filling problem. I have to fill it very slowly in order for it fill the tank. Other wise it does not work.
2
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0answers
56 views

I had a gas leak and put a new hose on it. It was fine until we put clamps on and now it's leaking again [closed]

I have a 1996 Buick Regal and I had to replace the hose. I had a gas leak and now that I put clamps around it the gas has started leaking again.
4
votes
0answers
57 views

Why did my van hesitate, then stall and not restart?

I have a 1989 Econoline 250 with low miles (60k) was driving on the highway today when I suddenly lost power, tried to give it gas but it hesitated, then stalled so I pulled off. Check engine light ...
4
votes
2answers
1k views

Adjust carburettor without hi-speed adjustment

I've got a Walbro WA226 with no hi-speed adjustment screw. Unfortunately, it seems that the issue is in the high-speed jet. Adjusting the low screw can set me up so long as the throttle is at full, ...
1
vote
1answer
109 views

2000 Ford Explorer Electrical Problems

Bought an used Ford Explorer a little while back & have since replaced the fuel pump , this will be the fourth time, in a six month period. The battery, the fuel filter, checked all the relays &...
2
votes
2answers
64 views

a/f mixture for 4 cycle brushcutter

Hi I have a ryobi rbc430sbsb 4-cycle brushcutter. When I use brus cutter it seems to start relatively easy and seems to work reasonably well but when switched off it seems to be dumping fuel out ...