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Fuel and Engines
We commonly relate fuel and engines with gasoline. Other engines also run on natural gas such as propane and “bio-fuels” such as ethanol. The principle remains the same as the fuel induces internal combustion.
6,197 Questions
Do spark plugs really causes a car to burn less gas?
Ok first off, most cars today use gasoline engines and not diesel engines so that has to be addressed as a factor (you cant run a diesel engine on spark plugs they use GLOW plugs) so assuming you are using a gasoline engine and not diesel then we can continue
SO assuming you are using a gasoline engine that uses SPARK plugs in the first place I do not understand the question.
BUT, Im assuming once again that you are wondering whether the different brands and or changing them out will yield better mpg
The answer to that is yes on all counts.
New spark plugs provide a better spark than older ones and as such increase the ratio of fuel actually burned inside the engine and not wasted. So it increases the mpg there
The difference between brands are many and the materials each brand uses also varies. But your car comes with normally piss poor plugs to start with so picking a relatively cheap and well made product can give you the same results as your typical run of the mill OEM product. I would take the extra money and buy a more higher end model but not the most expensive ones. The reason is that the higher end spark plugs last longer in between changes, increase horsepower, increase mpg, and are made from better quality. They are better all the way around. I hope that answered your question
the firing position for the 4.6 litre engine is as follows, open your hood and look at your engine, now, starting from the passenger side,the closest one to you is one,then two,behind it,then three and four.Number five is the closest one to you on the drivers side then six,seven,eight working your way towards the back,EASY!
Why would your car rev up and shake?
If the rpms are above normal the most likely problem is a vacuum leak at the intake side of the engine. This condition will also typically cause a rough running situation at idle. Another thing that could cause a car to rev up and shake is a bad ecc(computer).
also check your motor mounts if you have an old car.
What causes an engine to overheat?
Severl things it could be if it's overheating raditor may be clog or crack or warp heads then it could be something simple like raditor cap or the thermostat even a simple oil change just have to find and test these things before you rule out what it is.
Low coolant
Cooling fan not working
Radiator plugged or air flow restricted
Defective thermostat
Collapsing radiator hoses
System "airbound"
Defective radiator cap Many things can cause engines to overheat, but it all boils down to two things: lack of coolant because of a leak or lack of proper flow. The most common cause of overheating is a bad thermostat. It could also be caused by a bad water pump not circulating the coolant. If it is leaking coolant there are many hoses and gaskets it could leak from.
Why might a car not start then start the next day?
- It could have been flooded with gas (although this is less common in newer cars).
- The gas line could have been frozen the first day and thawed by the next.
- Cold weather can also cause the fluids in the engine to thicken, making the engine unable to "crank" fast enough to start.
- The battery could be a little low from cold weather or approaching end of life, and not provide enough power to "crank" the engine.
- It could be a diesel engine in cold weather.*
- There might be dirt or other debris in the gas plugging the line that gets unplugged the next time the engine is started. Use better gas (e.g. brand name). Check fuel filter.
- A starter wire could have a loose connection that causes intermittent starting problems.
- A spark plug could be malfunctioning or dirty.
- If it happens when the engine is hot, it could be the ignition module.
- Might be a loose starter motor control wire.
- You may be at the bottom of the fuel tank and not know it because you have a faulty fuel gauge, then you could have the debris in the gas problem when you don't expect it.
- Your air control valve may be dirty.
- Fuel pressure could be an issue.
- Battery contacts could be dirty or loose.
- The alternator or distributor may need maintenance.
- There might be a problem with the anti-theft system, disabling starts. Or with a programmed key that the car no longer recognizes.
- It could be the computer has loose connections or has gone bonkers.
- If you have driven through water, washed the engine, or otherwise got water in the ignition, it could be short circuited by water that evaporates by the next day.
As you can see, there are many things that could be wrong, this is not an entire list by any means. However, the most common problems are with ignition, battery, fuel delivery, dirty parts, and bad wire connections.
*If the temperature is cold, diesels are notoriously hard to start. As mentioned above, in cold weather oils in the car thicken and battery strength drops, both making the engine hard to crank. The type of oil may need to be changed. Thicker oils like 15W-40 are great in warmer weather in diesels, but when temperatures get below freezing or even lower, they get too thick. 30 or 40 weight oils are especially too thick. Or you may need to use an engine warmer to keep the oil from getting thick in winters.
What is the cause for a massive oil leak coming from the upper part of the engine?
you are still pouring oil into it---stop!
What does clutch drag on a new clutch mean?
Clutch drag is when the clutch pedal is fully depressed and the clutch is still partially engaged. When the clutch pedal is released or in the up position the engine is connected to the transmission input shaft. When the pedal is depressed or in the down position the engine is disconnected completely from the transmission. When the clutch drags it is still partially attached to the engine. A dragging clutch can cause a glazed flywheel and premature failure of the clutch. It will also cause the syncros to work twice as hard to slow down or speed up a gear inside the transmission when shifting. Basically syncros will wear out faster than normal and may not work properly depending on how bad the clutch drag is.
check for moisture being let in through the air intake...
A misfire is also called "predetonation". Usually it is caused by spark plugs or some deposit in the cylinder / head that is not transferring heat to the cooling jacket, and is prematurely igniting the fuel. Other options might be bad timing, shorted spark plug wires, or carbon tracking under the distributor cap.
could be alot of things, but most common would be spark jump from a bad wire. look inside your engine compartment at night and see if you can see spark from a wire arcing over to the block or something else that's nearby. look on both sides and move your plug wires around. also pull all wires 1 AT A TIME and see if it makes the vehicle idle worse. keep pulling and putting back on each wire till you think you found the bad wire. the bad wire will be the one that when you pull it- THE VEHICLE RUNS THE SAME
or you could have a bad plug, which will be similar to solving as the wire pulling technique.
or you could have something bad inside your distributor weather its points or HEI type distributor.
or it could be timing problems besides that. in which case most carport mechanics need professional assistance.
What year are the H engine numbers for aircoooled VW?
I don't know what year, But I can give this info.:
'H' is A 1500 motor single reliefe.
It can be made into any size motor from 1300 to the 1600 even with big bore kits like 1770.
The oil reliefe is single as opposed to dual on later models. That's fine for normal or even A little hot rodding, But not too much,
It is A good basic VW engine if you are wanting A good dependable daily driver or A off road ride that will be used with care and not trying to see how much abuse it will handle.
What is the engine size of 96 Nissan PU?
PU 2.4L
PU king cab XE 3.0L
PU SE 2.4L
PU short bed XE 2.4L
PU XE 2.4L
If your 1999 Ford Explorer takes longer to crank before starting than before what should you check?
First clean the inside of the throttle body with an aproved cleaner safe for coated intakes. You will find it to be very gummy and sticky. Use an old tooth brush to scrub the back and front of the butterfly. Second, run two treatments of the fuel system cleaner TECHRON made buy Chevron Chemical. Techron is by far the must effective fuel injector cleaner on the market, it is sold at any auto part store.
The starter
My mechanic told me that 3M makes the best that he has used that it will not dissolve the clearcoat. ALSO he had told that on the '97's up NOT to use the Berryman ChemTool spray and injector cleaner amongst some of the other brands like you buy at Wal-Mart that contain xylene and tuolene, that it will dissolve the clear coat inside of the throttle body. I had done this on my '01 and now it idles too high because the clearcoat had dissolved. SO only choice I had without spending a lot for a repair bill was for my mechanic to set the base idle (which he really preferred not to, but he did it anyway for I'm one of his biggest customers), so now it idles a little too slow @ about 550- 600 RPM, when it should be idling around 850-900 RPM.
Start engine but shift lever would not move?
Many vehicles have a lock that prevents the transmission from being shifted into gear accidentally. If the transmission won't shift when you press on the brake, it's probably either the switch on the brake pedal, or the solenoid that releases the shifter. My 2004 Honda Odessey did the same thing. I figured it out when I noticed that the horn was also out, and the brake lights wouldn't work. There is a 20Amp "Stop" fuse located in the main under-hood fuse box on the left side of the engine compartment. If that fuse blows, it takes power from the horn and the brake switch on the brake pedal. Without that brake switch, the shift lock solenoid also looses power and you can't shift out of Park. If you can't replace the fuse, you can manually release the shift lever lock by prying off that little rectangular cover on the top of the steering wheel shaft housing. Once the little cover is off, you can insert a key or small screwdriver into the slot and press down to release the shift lever. The owners manual describes how to do this. Just check the index under "Shift lever locked". The manual says to turn the car off, and then use a key to release the shift lever. Once the lever is out of the "Park" position, move the lever down to "Neutral" and start the car. If you can't replace that Stop fuse you will have to do this every time you put the shifter back in Park. Hpwever, you should not drive the car because you will have no break lights!!!
Will you hurt your engine if you drive it firing on only 7 out of eight cylinders?
Yes because the last piston is not being lubed so eventily it will cease in time and possibly blow a head or block or both.
What are the valve settings for 350 Chevy engine?
Hi there, I hope that I can help as I have had a heck of a time trying to find the answer to this question myself. The valve setting for a Chevy 350 engine is as follows :- Intake 10 - 27 thou (inches) Exhaust 10 - 27 thou (inches) I have a 1977 Chevy Scottsdale camper Special C20 2 wheel drive, 3/4 tonne Pick-up truck and tried setting the valves as directed by Chevy, and also the Haynes manuals. Don't bother as the info that they provide is so vague, it's a joke. I actually found the valve settings in an obscure part of the Haynes manual and the description was so poorly written that if I couldn't read between the lines, then it would have gone unseen. Having taken into account the age of my engine, mileage etc etc I decided to set all my valves with a setting of 10 thou. Ideally you should take the middle of the difference, 10 - 27 thou, difference of 17, split by 2, ......8 and add to the smallest setting, 10 thou + 8 thou gives 18 thou !!!!!!!!! After having set my valves the engine now runs like a dream. And, to prove that it is correct, 4 days later I did a road trip from Vancouver Island to Alberta, a distance of approx 800 miles/1200 kms and the engines still runs like a dream and starts on the very first turn of the key. The exhaust is a clean sooty black, the power range is improved, mileage is also improved and the sound of the engine just purring is also prove. I hope that this helps out all that are looking for the answer, Tony.
cam92rs- hydrolic lifters and solid lifters are completely different. chances are you have hydrolic flat tappet cam and lifters. the best way to adjust those are to run the engine and losen 1 rocker at a time, till it chatters, then tighten till the chatter stops, then go a quarter turn tighter. that's an old mans tip and they have been doing it this way for years. the correct lash is (0) zero. tighten the rocker while turning the pushrod until you feel slight resistance.. there should be no up and down movement.
What does Purolator oil filter fit?
I am not sure if this filter is good for other makes / models however I am using it (L15315) on my 1999 Volvo v70 XC
Where is the fuel pump relay on a 1991 GMC Sonoma 4.3?
the relay is located on the upper firewall on the drivers side in the rack of 2 relays. One is for the air cond if equiped with one and the outer should be the fuel pump relay. Be sure to check the relay with a voltmeter set at 20 volt dc scale , the reading should indicate voltage thru the relay or none which should tell you if a new one is needed. May want to be sure you have a good ground on the frame near the pump assembly unit as it will make you think the pump is bad but realy at times you loose the ground due to bad rust. old rusty wrench,,Rives Jct., Mi.
How long does it take to replace an engine?
I've been researching it myself and most answers I've seen say anywhere from a couple of days to a week
What can you do if a new engine has an idle speed at 500rpm that's steady but not right?
Review the data for the vehicle online at a free information site, like the troubleshooting at autozone's site, or buy a manual for your model to get the correct idle speed. Normally, adjusting idle speed correctly requires setting the car to a diagnostic mode. This is often done by shorting specific connectors on a diagnostic connector, ensuring the vehicle is warmed up, the AC is off, it is in Park, and all accessories are turned off. In diagnostic mode, you should be able to set the timing (using a light normally) by rotating the distributor (for cars with distributors only). While you are in that mode, you can also check the idle speed, and adjust if your idle control system allows adjustment. Many vehicles do not allow or make no provision for adjustment. While timing can affect idle, the statement "I think you should advance the timing by adjusting the distributer a little until the RPM goes to where you need it" is not accurate. Set the timing to the specified value, then adjust idle speed. Advancing timing too far causes increased NOx emissions and stress or pinging, (and more power, to a point), reducing it too far causes loss of power and can burn valves. If your idle is still not stable after setting it to the specified value, begin troubleshooting per normal techniques.. like, checking EGR, for vacuum leaks, ignition issues, fuel delivery, etc.
Depends on the engine, but 180 or 190 is a pretty common temperature for a thermostat to open and release coolant from an engine.
Why does the starter make a loud spinning noise and not crank over the engine?
If it happens intermittently, it is caused by a broken tooth or teeth on the engine ring gear. Thus when the starter solenoid throws the pinion gear backwards, the pinion and ring gear will not engage. In some rare cases the pinion gear can come off or the solenoid itself fails, yeilding the same result. You can test this by putting the car into gear and moving it slightly to move the ring gear (in some cars). Sometimes opening the drivers door and jumping up and down on the door sill can rock the engine enough to move the ring (again in some cars). The car might start. The only fix for this ultimately is to replace the ring gear.
What is the difference between direct injection and indirect injection?
Direct injection injects the fuel charge directly into the combustion chamber, (more efficient). Indirect injection injects the fuel charge into the intake port behind the intake valve, or in the case of Throttle Body injection, into the center of the intake manifold for distribution to the cylinders. Indirect injection was much cheaper to produce, but resulted in higher emissions and reduced power relative to direct injection.
Source(s):ASE Master Technician, 46 years experience.What is the working principle of a engine and explain?
The working principle in an engine is to compress gasoline in a mixture with air in the piston chamber and ignite it with a spark that comes from the spark plug. When the fuel is ignited the preassure makes the piston go back down.
This up and down movements of the pistons make the engine move the transmition to move the wheels for movement.
