It only works on vehicles designed to run on diesel fuel. If you use gasoline in a diesel engine damage will likely occur as gasoline does not ignite properly and burns too quickly resulting in very low power output of the diesel engine. Today, many vehicles are built to run on alternative fuels.
It is less expensive than gasoline but leads to lower miles per gallon. There should be a decal or label on your car identifying that it is E85 compatible also known as flex fuel. Other alternative fuels include liquefied petroleum gas, compressed natural gas, and liquid nitrogen. However, most vehicles are not built to accept these fuels. Electric cars are gaining popularity. They run on electricity rather than gas.
Before these cars can drive, the operator needs to be sure the battery is sufficiently charged. It is best to check the timing stroboscopically with the engine running - this is far more accurate than doing it statically. If running-on still persists, your next avenue of investigation is the fuel system.
First make sure the air filter is clean and correctly fitted. Follow all the emission system pipes that connect to the filter or carburettor to check that none is disconnected or split. If all else seems well so far, start the engine and listen for a hissing or sucking sound from any of the joints between the carburettor and inlet manifold, or the inlet manifold and engine. Don't forget to check where any pipes or hoses join the manifold.
Try not to confuse the sound with the normal intake roar through the carburettor. If you think you may have found a leak, use a piece of tube as a stethoscope to listen along the joint to make sure.
As a further check, paint a little oil on to the joint with an old paint brush - if there is a leak you will see the oil disappearing into the hole. Replace any suspect gaskets. If the manifold is leak-free, turn your attention to the carburettor.
Also check that the idling speed is not set too high because this can cause running on. If you have trouble getting the carburettor to tune, there may be wear in the carburettor itself. If it is beyond saving, you need a new or reconditioned carburettor.
You may be able to save money by getting one from a scrapyard. The anti-dieselling valve fitted by the car manufacturer is usually the type built into the side of the carburettor, rather than an air bleed valve connecting to the inlet manifold.
To check the valve, disconnect the wire and carefully unscrew the valve from the side of the carburettor using an open-ended spanner. You can usually get it out without removing the carburettor. Use a jumper lead to connect the live terminal or wire on the valve to the battery positive terminal, and touch the casing of the valve to the negative. If the valve works, there will be a click and the rod in the end will retract. The other point to check on the carburettor is the anti-dieselling valve if your car has one.
If this valve is the type built into the side of the carburettor, which shuts off the fuel flow to the idle jet when the ignition is switched off, then it can stick in the open position, allowing fuel to flow through and causing running-on.
To find the valve, consult your dealer or check in a workshop manual to see if your car has one. What powers those pistons up and down are thousands of tiny controlled explosions occurring each minute, created by mixing fuel with oxygen and igniting the mixture. Each time the fuel ignites is called the combustion, or power, stroke. The heat and expanding gases from this miniexplosion push the piston down in the cylinder.
Almost all of today's internal-combustion engines to keep it simple, we'll focus on gasoline powerplants here are of the four-stroke variety. Beyond the combustion stroke, which pushes the piston down from the top of the cylinder, there are three other strokes: intake, compression, and exhaust.
Engines need air namely oxygen to burn fuel. During the intake stroke, valves open to allow the piston to act like a syringe as it moves downward, drawing in ambient air through the engine's intake system. When the piston reaches the bottom of its stroke, the intake valves close, effectively sealing the cylinder for the compression stroke, which is in the opposite direction as the intake stroke. The upward movement of the piston compresses the intake charge. In today's most modern engines, gasoline is injected directly into the cylinders near the top of the compression stroke.
Other engines premix the air and fuel during the intake stroke. In either case, just before the piston reaches the top of its travel, known as top dead center, spark plugs ignite the air and fuel mixture. The resulting expansion of hot, burning gases pushes the piston in the opposite direction down during the combustion stroke.
Volkswagen is a well-known manufacturer of diesel cars. The next video will illustrate the difference between petrol and diesel engines:. Diesel fuel that is created using vegetable oils or animal fats is called bio-diesel. It can be made using soybean oil, lard, algae, and vegetable oils. Some inventive drivers have found ways to recycle used cooking oils into biodiesel that powers altered car engines.
Watch the following video to learn more about biofuels:. Although ethanol is not widely used as general automobile fuel, it is added to our common gasoline as an additive. Many car manufacturers are designing vehicles that can be powered by ethanol because it is a cost-effective fuel made from renewable resources like corn and sugarcane. If you are in the market for an ethanol-powered vehicle, there are a few car models that can run on percent ethanol.
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