Question about 1984 Toyota Celica

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Car has been idle for 8 months - is gas still good?

If the car has been sitting for 8 months to a year, do I need to clean the gas tank before I turn it on. In other words, how long can gas sit before it deteriorates to the point that it may clog up fuel injectors or cause other problems?

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I would have to say yes to be safe

Posted on Jan 04, 2009


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2 Answers

Do I have a bad fuel pump

Not symptoms of a pump. Sounds more like a bad idle air control valve. run some fuel system cleaned in it and run a full tank of gas to see if it changes.

Oct 06, 2014 | 1997 Buick Skylark

1 Answer

I have a 2003 pt cruiser. It was sitting for 8 months. I change d the water pump and put a new battery. but it wont turn over.

the gas has turned bad shudda put a stabilizer in it-always drain tank and fuel system when storing--the throttl area may hav effected and a pro cleaning mite hav to be done--ethanol gas makes it worse-try to use pure gasoline-is more xpensiv but worthit

Aug 22, 2014 | Cars & Trucks

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1998 idles too high at startup when cold SOHC 4.0 ford explorer

Try spraying carb/throttle body cleaner around the throttle body after the truck is warmed up all the way get someone to sit in the truck with it in drive and there foot on the brake if the idle raises there's a vacuum line leaking or your throttle body gasket is leaking if no increase in idle then thoroughly clean out the throttle body with the spray if it's very dirty inside the varnish from the fuel burning is causing the throttle plate to stick or stay open causing your engine to have increased rpms if your using no name brand gas stop now your killing your motor the major brands have detergents in the gas to keep things clean and better mpgs brands like usa Valero speedway delta liberty are all garbage and should only be used in an emergency situation like you're going to run out also if you are using this junk get 2 cans of Berrimans fuel system cleaner and put it in the gas tank every week for a month or so this will clean out the emissions and gas tank of the dirt and varnish from bad cheap gas I say 2 at a time because the super strength is needed to clean out the gunk and keep using it at least 1 can a month with good higher grade fuel 93 octane for about 2 months after then either stay at 93 or go to 91 or 89 not 87 ///// now the reason for the higher octane fuel is this the higher the octane level the slower the fuel burns and cleaner more efficient burning with the cleaner combination to get out the gunk your truck will run much better and mpgs will increase now post back with progress write down everything you've done and we will take it from there if the problem persists but I don't think so I'm a taxi mechanic in nyc.with 50 years experience so that's where the information is coming from and a lot of the cars have 300,000 to 450,000 miles on them so I would say you should listen to this advice they are ford crown Victorias and are original motors good luck stephen

Dec 11, 2017 | 1998 Ford Explorer

1 Answer

I have a 1991 Honda accord has been sitting for years now it wont start where should I start I was told that the gas turns to funk after sitting for a long time.

if it is posible for you to drain the the old gasoline out and refill the tank with fresh gasoline that would be great, but if you only have a1/4 tank and draining the tank is not posible fill your tank up with supreme gas not regular the better grade gas with the high octane will dilute the old gas and help burn off the gas when the car starts.if you have more then 1/2 a tank try to pump out the gas with a driil pump, you can buy these a your local hardware store insert hose in filler neck of the should also remove the spark plugs and with and oil can add 8 good pumps of the can of motor oil in the cylinders do not replace plugs **** with a freshly charged battery turn the engine over few time in 2 or 3 second intervals this will kleen any rust that would have built up on the cylinder walls and also lube up the cylinder wall so that at start up the cylinder wont be dry ,add a few more sqirts of oil between turnovers.Replace spark plug if old ones look bad put spark plug in and start her up its going to smoke a bit at firts **** it will stop after the oil that was put in the cylinders burns off,let the engine idle for 10-15 minutes before putting any strain on motor give it a chance to clean out cylinders burn a few tanks of gas and change gas filter it should be fine.

Apr 04, 2011 | 1991 Honda Accord

1 Answer

94 Topaz sitting idle for 1.25 years. Tried to start and will kick over when use of fast start spray but will not stay on. Added 104 octane to fuel tank and 2 gallons new gas to idle gas in tank (approx...

As gasoline sits idle for that length of time, it turns into shellac.
this in turn plugs up the orifices in the carb, use a good quality carb cleaner, or fuel injector cleaner as the case maybe. follow the directions carefully. You may have to do this a couple of times.
Good Luck

Mar 19, 2011 | 1994 Mercury Topaz

1 Answer

Hello, my car has sat for about 8 months, 4 months into it, I started it up and once the engine warms up, the idle begins to fluctuate between 1100 and 2000 rpm, up and down up and down it does not do this...

Gasoline left in a cycle or lawn mower over the winter months tends to not burn as clean as fresh gas and eventually will gum up the spark plug, making the engine run rough or hard to start... it's best to drain the tank if you aren't going to use the fuel in a couple months... the colder temperature may also cause the fuel to become less potent, it also turns a darker color I and suspect it may be due to evaporation.

There are products when added to fuel (gas/diesel) to make the fuel more stable over longer periods of time and even renew fuel that's aged...

This is an article I found on gas. I have had this happen to me and if the gas goes bad in lawn mowers I'm sure the same thing will happen in cars just not as common due to cars usually don't sit around.

I would try putting a gas stabilizer in and run that tank of gas till almost empty then fill it and see if the problem is still there.

Also take a look under the hood and look at the wires and vacuum hoses animals seems to like chewing on them some times.

If none of this works repost but let us know if the battery was dead at any time and if the check engine come on while the engine is running.

Jan 06, 2011 | 1997 Honda Civic

2 Answers

I left my car for 4 years and when i started it the idle became unstable. in the reverse mode the idle drops to zero. i changed the spark plug and adjusted the ecu and it fixed the problem after using it...

Leaving a car sit that long isn't the main problem. It's the gas.

Over time it thickens and turns to a varnish like material that can gum up key components (like your injectors, fuel pump, fuel lines, etc)

I'm surprised the dealership did not comment on this.

At any rate, the first thing to do is lose what gas is still in the tank. Add OCTANE BOOSTER and Injector cleaner and fill it with High-test. Then drive it around for a while.

Hopefully that will have an effect. I'm trying to avoid surgery on the fuel system. Hence the more passive approach.

Best of luck

Aug 12, 2010 | 1992 Mitsubishi Galant

1 Answer

Vehicle idles high for a few minutes, then shuts

did u use fuel stabalizer? if not the gas can turn into a varsale like substance that can clog fuel filter and reck injector seal's, also check the disributor cap and rotor for condensation, this can happen over a period of sitting

Jun 07, 2010 | 1985 Toyota Pickup

1 Answer

My truck will only idle what to do? Do injectors plug? This truck has been sitting for at least 3 years. I drained the old gas and added new. The fuel pump has pressure.

Good chance that the fuel line/injectors/etc. have a varnish on them from the gas evaporating over time. Needs a good cleaning. Suggest something better than just pouring something in gas tank.


Sep 29, 2009 | 1986 Nissan Pickup 4WD 1986

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