Question about 2004 Hyundai Elantra

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Fuel evaporating from fuel tank

Fuel seems to be evaporting from the fuel tank while car is idle. Otherwise car gets great fuel economy

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You need a plush cas cap some gas caps will allow gas to escape and the otherwill allow gas fumes to stay in. Just go to a part stor and ask for the one that will not valve fumes out put keep it in.K thank you.

Posted on Nov 08, 2008

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2000 Ford Taurus 3.0 24 valve OHDC Engine fuel problems. Bucking engine when running down highway especially below half a tank to quarter of a tank. Fuel pump and fuel filter replaced 2 months ago. Se


Have a repair shop go for a ride with you, as you
explain the issues

Then have them diagnose & resolve

Stay away from the Genies in a bottle, they only take
your money

If you don't understand the product & don't test a thing,
don't think a can of anything - will do anything

Mar 16, 2013 | 2000 Ford Taurus

Tip

Get the best fuel mileage


Be sure and get your gas early in the morning and keep above 1/2 full , this will keep more liquid in your tank and less evaporation,,,hence better fuel economy.

on Apr 01, 2011 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

My 1996 honda accord consumes too much fuel in a ratio of 1-6 km /liter, what seems to be the problem? I have it tuned up, cleaned the throttles, etc,, but to no avail. whats the best thing to do?


Since you've cleverly already done the normal tune-up items that preserve the 96 Accord's good fuel economy, its time to move onto the tougher adventures.

Cars with outrageously bad fuel consumption are losing fuel somehow (aka leaking).
(a) There's a fuel tank drain plug on the bottom of the fuel tank (used to drain tank for service) - make sure its tight and that the tank isn't leaking fuel there.
(b) check your fuel lines - there are 2 (one supplies fuel to the engine, and the other returns excess to the tank). If either is leaking, your car will lose petrol quickly.
(c) the evaporative fuel canister - instead of absorbing vapours, it may be full of fuel and leaking..
(d) check your fuel rail - its pressurized with fuel while the car is running - it may be leaking - and if it is: (1) the top of your engine will soon catch fire (2) the fuel may be evaporating as soon as it leaks, since the top of the engine gets so hot.

Use a fuel pressure gauge to test the fuel pressure in your 96 Accord's fuel rail - attach your
(with an appropriate (brass) adapter) to where the banjo bolt enters the top of the fuel filter - as
described in this passage from the Honda repair manual:

From the 1996 Honda Accord repair manual:
Note that this part of the Honda manual fails to mention that before you disconnect the negative terminal of the battery, you must note (and write down) the 3-digit radio lock code
--- begin excerpt ---
The Fuel System Pressure Specification


38-46 PSI (Pounds per Square Inch)Remove the ground cable from the negative battery post and also remove the fuel tank filler cap. Slowly release system pressure at the fuel filter and cleanup spilled fuel. Remove the Banjo bolt and install a fuel pressure test gauge. Reconnect the battery ground cable and proceed to start the engine and allow the system pressure to stabilize. While the engine is at idle, block off/pinch the number (1) vacuum line to the fuel pressure regulator and visually verify the fuel pressure reading on the test gauge.
--- end excerpt from 1996 Honda Accord repair guide ---

(e) possible leaking fuel pressure regulator - located at back of top side of engine, and looks like an
enlarged fuel filter - with hose clamps on either end clamping the fuel line. Retighten its bolts to 12 Nm (9 ft-lbs) when done checking it (for leakage).

(f) to move on from fuel - if you're getting only partial ignition, your fuel economy will suffer too - but you'll smell alot of unburned fuel in your exhaust (and get alot of backfiring). Use your HEI (high energy ignition) tester to rule out ignition (spark) problems.

Jan 02, 2011 | 1996 Honda Accord

1 Answer

I am not getting good fuel economy for the last 2 months. Performance and acceleration are good and the same but since I had a low impact front end collission at about 10 mph where I rear-ended a big...


only the mechanic can answer that, he's the one looking at the car. If he diagnosed a bad valve, get it fixed., then see if it made a difference.

Nov 16, 2010 | 2001 Chrysler PT Cruiser

2 Answers

My 95 intrepid is really hard on fuel


temp sensors, lambda/oxygen sensor/ reading wrong temp - they would both increasse fuel consumption - have the diagnostics checked at garage.
Air filter, it it clogged or really dirty?
Tyre pressures - make sure they are upto reccomended pressure, (extra pressure reduces rolling resistance and increases fuel economy but at the cost of grip...)
Binding brakes?
Fuel Leak?

Leave feedback good or bad

Jan 21, 2010 | 1995 Dodge Intrepid

3 Answers

What is a p0440 problem?


Hi there,

Oldsmobile code P0440 refers to: Evaporative Emission System

This means there is a problem with the Evap System, and you will need to inspect the related components:

- Purge Solenoid:

Related Symptoms
  • Stalls after start with a hot engine
  • Poor Fuel economy
  • Emission related faults
- Evap Canistor: Check evap canistor for loose carbon.

- Evap Canistor Vent Valve:

Related Symptoms
  • Poor fuel economy
  • Stalls after start
  • Emissions related failure DTC codes
Hope this helps...

Cheers,

Nov 12, 2009 | 2001 Oldsmobile Alero

1 Answer

I did a test on my 2000 Lanos Daewoo it showed up computer output circut and evaportion sensor. What does that mean?


That is an emmission device contolled by computer.System is comprised of a charcoal canister designed to trap fuel vapors. This canister is then purged during engine operation. One very possible item with can cause evaporative canister codes is a loose or missing fuel cap which needs to seal the fuel tank properly for proper vent and purge operation.The check valve in the cap can as well cause trouble codes.Make sure your fuel cap is the vented style if its ever been replaced.If this doesnt sound like the issues you are having,please further elaborate on the trouble code or discrcription you are giving as I'm unaware of other evaporation codes pertaining to this carline but willing to investigate for you.

Jun 27, 2009 | 2000 Daewoo Lanos

3 Answers

Cant locate the fuel filter for a 1989 firebird formula


It should be under the car, back by the gas tank

Mar 28, 2009 | 1989 Pontiac Firebird

1 Answer

1994 Buick Century - high idle, hesitation @ speed & little power


Have u checked to make sure that the fuel filter isn't plugged, and it could be possible that the fuel pump is bad -being cracked or haveing a bad seal in it allowing fuel to leak back in the gas tank, as soon as your fuel pump warms up the leak would expand dropping your power

Jan 18, 2009 | 1994 Buick Century

1 Answer

Check engine light came on. Told it was a vapor sensor. What does that mean?


hi
it was a part of (EVAP) system
Evaporative emission control system
this system pull up the fuel vapor from fuel tank and send it to the engine to burn it
this system work to low emission ,fuel tank vent and economy of the fuel vapor
this system have a parts
1-canister purge valve
2-vent control valve
3-vent valve
4-pressure sensor
5-hoses and pipes connections
with my best wishes

Jul 02, 2008 | 2002 Toyota Corolla

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