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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35 views

Diesel engine fuel return pressure — how high above the engine can the fuel tank be

This is specifically regarding an inline six cylinder direct injection, external injectors, and injection pump. Circa 1998. Just a stock standard Diesel motor.... But in general also. The bush camp ...
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31 views

What kind of rubber hose to use with fuel vapor line?

I need to replace a fuel evaporation rubber hose and the OEM hose is no longer made. I was looking through McMaster Carr and saw that there were hoses specifically for fuel and specifically for air. ...
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What are these parts? Underside of Mercedes Sprinter close to fuel tank

These are from underside of Mercedes Sprinter close to fuel tank. One goes to the engine, the other to a diesel heater. I think they're too small to the fuel filters or pumps. What are they?
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32 views

Fuel Resistant Plastics

The environment inside the fuel tank sounds pretty bad when considering saturated petrol vapour. In tank electric pumps are common these days. What sort of plastic should the wire be made from? What ...
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26 views

what can cause vibrations on low revs

This is a 1995 (produced) 2,9D Ssangyong Musso (602EL) whit just 107000Km from new, can this be flywheel or vivration damper, or fuel system (havent made any control yet),
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23 views

Mitsubishi Outlander extended crank

Why would I have an extended crank after replacing all of my injectors and also have rich bank 1&2 codes? Have double checked timing and vacuum,all seems ok. If I shut it off and start it right ...
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18 views

Hard warm start + low long-term fuel trim (mixture too rich) DTC. How to diagnose?

Just wondering what my next steps are here. Vehicle is '05 Volvo V50 2.4i. Initially had two misfiring cylinders, which was tentatively diagnosed as a blown head gasket by the shop. I changed it ...
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1answer
494 views

Fuel rail pressure - how long should it hold?

My factory service manual states fuel pressure should be 50 psi with the engine running at idle. This is a six cylinder 2008 Subaru 3.0R engine with a return-less fuel line to the injectors. ...
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21 views

Fuel stains around outside of fuel cap?

I noticed some fuel stains on the paint around the fuel cap one day. I didn't think much of it - maybe that I had over-filled the tank and it had sloshed out the filler neck while driving, so I ...
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1answer
33 views

Mazda 6 V6 auto rough misfiring – fuel flow problem?

2007 Mazda 6 3.0L V6 automatic with ~80k miles: Runs "rough," especially while stopped in drive – feels like what I imagine an occasional cylinder misfire would feel like, producing a sort ...
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44 views

hyundai getz 1.3 only accept 100 RON fuel

I recently bought a hyundai getz 1.3 petrol car and its only "accept" a 100 RON fuel. I have tried 95 RON whitch is the most common fuel in my country and the check engine lights up. If the ...
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Hyundai Sonata not filling up with gas all the way after fuel pump replacement

So about two months ago I replaced the fuel pump in my 2012 Hyundai Sonata gls. When I picked it up and went to get gas it filled up to one bar below full and wouldn’t take anymore gas. For the last ...
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31 views

2013 Jeep Grand Cherokee fuel door won't close

The latch on my fuel door housing is stuck inside the housing and the fuel door has nothing to latch onto when I push the fuel door and try to close it. I've attached a picture of my existing fuel ...
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1answer
27 views

Should I worry about fuel pump noises after a filter and injector change?

I recently fixed a starting problem with my 2007 VW Rabbit. I ended up replacing both the fuel filter and fuel injectors. After I was done, per the manuals directions, I flushed as much air as I could ...
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12 views

Where can I find an adapter for a 2007 VW Rabbit Fuel Rail Bleeder Valve?

I just changed my fuel filter and am about to change my fuel injectors. I've gotten a significant amount of air to flush out of the fuel lines, and I would like to purge it using my fuel pressure ...
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25 views

I have a 2000 ford contour 2.0 runs fine but will not get any faster then 40 mph no matter how much throttle I give,

Motor runs fine transmission shits fine has full rpm range all gears but at 40 it will not run any faster no matter how much throttle you give
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05 VW Passat Turns over, won’t start

this car has been a problem from the beginning... engine light on, codes say misfire. Started overheating so I replaced thermostat. Still had hardly any power or acceleration, engine light flashes a ...
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3answers
44 views

2000 Ram van 3.9l overheated and now runs very rough

First, the belt came off and damaged a vacuum valve inline on the heater core hose. Valve broke and was replaced with straight half-inch pipe temp. But I still don't have heat. Then the upper radiator ...
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1answer
28 views

Does the fuel pressure regulator ever go out of calibration?

On GM 3800 SFI engine, does the fuel pressure regulator ever go out of calibration? My FPR does not leak, can I assume it is good? The fuel pressure rises with RPM and goes lower at idle. Is that all ...
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1answer
49 views

Is it possible to actually run on fumes

Regarding the phrase "running on fumes", if a tank is empty, will the engine get any power at all from fumes left from petrol (I don't mean drive it any distance), or is it just an ...
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1answer
42 views

I have a 1999 yamaha r1 and it bogs out really bad

So I've cleaned the carbs twice on this bike and its like it's not getting enough fuel because it will only run on starting fluid and I've cleaned the tank and got new hoses and still the same problem ...
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1answer
70 views

What do you think of these spark plugs?

Still trying to diagnose an erratic positive fuel trims. Next step will be making sure that the lean condition i have is caused by less fuel delivered or weak spark not a vacuum leak. I pulled spark ...
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1answer
30 views

Fuel System Diagnostics

If I have a fuel system problem, I'm wondering what I'd need to do to be able to fix the issue. I don't want to be replacing parts just to see if it would now work. I'd rather take diagnostic steps to ...
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1answer
58 views

Lowest Fuel trims achieved only in the 1200-1500 RPM range?

This car still driving me crazy. I wrote here before about getting the code P0171 and some suggested a vacuum or exhaust leak. I sprayed some flammable connector cleaner around the intake manifold, ...
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2answers
125 views

How many miles could you drive a diesel car with petrol before noticing?

I recently refuelled my brand new diesel engine car when it was basically empty (25 miles left) and then drove away. I drove the car for about 100 miles before noticing the standard juddering that you ...
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25 views

Help with intermittent cut out problem

Civic coupe vti 1999. Car sometimes cuts out straight after start sometimes during driving. Sometimes the car is driving without cutting out and I noticed it is harder to change gears but straight ...
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37 views

Can you tell from sound if it’s a fuel starvation problem?

Car was cutting out and mechanic told me ‘it sounds like a fuel starvation issue’. In other words he was able to get a lead from sound. Does this work and how would I be able to based on sound ...
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1answer
38 views

OBS Ford fuel quantity discrepancy

I recently purchased a 1997 Ford F-250 Heavy Duty with the 7.3L Powerstroke diesel and 212k miles on it. Two fuel tanks (front and rear) with a two-way selector on the dash. When I drove it off the ...
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GMC Envoy stalls when air conditioner is on and idling

2004 Envoy only dies when A/C is on and idling if it is in park or neutral no problem. Also will not crank after fueling once started will continue to turn over till refueling again. And service ...
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22 views

Tire width vs weight and fuel economy

215/85R16 weight=35.7lbs 245/75R16 weight=31.8lbs The diameter is the same for both. Same tire just different dimensions. My thought, the heavy but skinny one is going to be better on the highway but ...
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32 views

how to connect pressure gauge to fuel line

2009 toyota corolla 1.8L How can I find connectors to tee in a pressure gauge to my fuel line? The fuel lines are pipes so it's not possible to cut one to tee in. Below are instructions from the ...
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24 views

Took intake manifold off to replace knock sensor and takes two key turns to start engine on cold star

I replaced my knock sensors intake gasket cam shaft sensor and oil pressure sensor and now my 2005 chevy silverado 1500 Takes two key turns to start up, only sometimes, on a cold start. It was not ...
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1answer
207 views

Engine runs with carburetor's idle mixture screws closed [duplicate]

I have a Rochester Quadrajet on my boat and have been attempting to tune it. It seems that I'm getting too much fuel in with my mixture as I'm blowing black smoke. If I close the mixture screws ...
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73 views

how to Tee in a fuel pressure gauge to line on 2009 toyota corolla

Does anyone have experience teeing a fuel pressure gauge into the fuel line of a 2009 toyota corolla (specifically 1.8L) ? The 2010 model is virtually identical. The service manual says to connect it ...
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2answers
47 views

Sloshing in fuel tanks [closed]

Why is sloshing undesirable? How is sloshing prevented by installing baffles? Are there any other methods to prevent sloshing?
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1answer
58 views

Why is fuel going down quicker than expected giving miles driven?

Given the pandemic lock downs and such I've been using my car less, maybe 2 times a week and when I do drive it is for short drives, 5 miles or less usually. But it seems like each time I get in my ...
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90 views

How does this fuel tank assembly work?

I have a mini excavator (Terex HR16). I am trying to understand how the fuel tank assembly works. First some context: I was experiencing intermittent engine sputtering, sudden loss of power, and ...
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2answers
92 views

Car has been stored w/o additive, will continue storing longer - add additive now, or tool late?

I have a car ('96 Lexus ES 300) that's been parked non-operational for over eight months, except for one drive down the block last month (it started up just fine). It's in Los Angeles, so not too much ...
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33 views

Does the electric fuel pump get damaged?

The lorry was working just fine, and suddenly it stopped on its own. We did the checks including wiring, and finally, we discovered that it was a blown fuse which was no longer supplying power to the ...
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1answer
58 views

Does weekly use of vehicle decrease concerns about gas going bad?

It's recommended to use fuel stabilizer for long-term storage. The instructions for stabilizers say to run engine for a while to properly mix with fuel and protect entire system. Does regular use ...
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1answer
30 views

Why does it take more than a few gallons of gas for the fuel tank meter to update?

I noticed this recently with newer cars with electronic displays, in that for whatever reason, if you only add a gallon or two of gas, the fuel gauge won't update. However, if you fill it from a ...
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3answers
71 views

Fuel pump problem

My daughter's car, a Honda Jazz, have not been used for more than 3 weeks. We replaced a new battery as the engine failed to start. Even with new battery, the engine still failed to crank. We took it ...
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2answers
74 views

Second butterfly valve in riding lawnmower?

So I am helping out my neighbor with her lawnmower, tuning it up and what not for the summer. I noticed that when running the lawnmower, as soon as you take it off of choke, it revs up as fast as it ...
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1answer
163 views

Bike not starting after filling it with petrol, but was completely empty before

My bike is a Honda dream neo-110cc It was completely empty before I refilled it with petrol. Now it's not starting. Someone told me that I needed to kick-start it. What was happening? What can be done?...
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73 views

What is the plastic plug for on the bottom of an SU HS4 Carburettor Piston?

Please could somebody explain the purpose of this plastic plug on the bottom of my SU HS4 carburettor piston? The lip of the plug protrudes very slightly from the bottom of the piston (shown bottom ...
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0answers
60 views

Mazda 6 MZR-CD diesel fuel issue

I have a mazda 6 mzr-cd turbo diesel wagon 2009 model. I just purchased the car and after trying to jump the car i thought the engine had no compression. However after trying again with a stronger ...
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1answer
70 views

What is the maximum calculated mpg the display will show

2015 Forester, manual transmission. I drive to maximize fuel economy, and have reached 31.5 mpg. And there it stays, for a LONG time, even though by the usual progression it should have incremented ...
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1answer
65 views

2 fuel pumps dying due to electrical issues?

I bought a 95 240sx se as a project car with a blacktop sr swapped in it. I bought it knowing it didn't run. It cranks but no fuel pump prime. So I replaced the fuel pump and it started up. After ...
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1answer
19 views

Hyundai i20 1.4 glide 2012 model

Evening guys, my car has a very serious problem, it consumes too much fuel and i have noticed that my rev counter is very high when driving, if am driving 100km\h the rev counter would be at 4100rpm, ...
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1answer
62 views

Why is there no power going to my fuel pump?

2003 Kia Spectra, here's the backstory : I recently changed the spark plugs and soon after doing so I tried to turn the car on and it only cranked. The owner before me probably try to work on the ...

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