tcatm
30.05.2021 16:10:02
Some other usual things that can make knocking sounds are the serpenting or timing belt tensioners/pulleys, bad rod bearings, faulty hydraulic lifters, or noisy fuel injectors. here
See full version: 6 Causes of a Knocking or Pinging Car Engine; How to fix it
Some other usual things that can make knocking sounds are the serpenting or timing belt tensioners/pulleys, bad rod bearings, faulty hydraulic lifters, or noisy fuel injectors. here
Car engines can make a lot different noises and some are more severe than others.
This heat can cause the air-fuel mixture to self-ignite before the spark plug sends its spark, which will cause the engine to start knocking. These types of destinations are hazardous for your engine’s internal parts and can melt down your pistons quickly. more
There is no fixed price to fix an engine knock. Often you only have to use octane boosters or refill the fuel tank with new fuel. In the worst case, you have to adjust the ignition timing or replace the knock sensor. You can expect a cost of 100$ to 200$ though.
If you have an older car or if the car engine has adjustable ignition timing, you do absolutely want to check and adjust it. Check your repair manual to find out if you have an adjustable timing or not.
Depending on the vehicle, engine, and spark plug type, spark plugs generally last from 30,000 to 120,000 miles (48,000 km to 193,000 km). Spark plug wires and ignition coils tend to last a little longer, but usually no more than double the lifespan of the spark plugs they power. For most vehicles, replacing spark plugs is a simple matter, though you might need to be a contortionist to get to some of them, perhaps placed behind shields or under intake manifolds and other equipment. Here are the basic steps to replace spark plugs.
In gasoline engines, the heat is provided in the form of a tiny lightning bolt. High voltage, 5 kV to 45 kV, depending on the vehicle, is generated in an ignition coil, controlled by a distributor or engine control module (ECM). The charge is conducted to the spark plug via a spark plug wire. The spark occurs when the charge jumps between the spark plug electrodes, just 0.01” to 0.07” (0.25 mm to 1.8 mm) across. The heat generated, between 8,500 °F and 11,800 °F (4,700 °C to 6,500 °C), ignites the air-fuel mixture, driving the piston down in the power stroke [links]
Fire requires three components: oxygen (O2), fuel, and heat. In your engine, every time a cylinder pulls an intake stroke, it pulls in air (≈21% O2). Port-injection engines inject fuel during the intake stroke, while direct-injection engines, gasoline or diesel, might wait until the compression stroke. Finally, heat is provided in one of two ways: one or two spark plugs for gasoline engines, or the heat of compression for diesel engines. The result, as when any time these three components are combined, is a tiny explosion. Cruising at 55 mph (88 kph), the average cylinder will fire about 1,000 times per minute, or 16 times per second! here
During its lifetime, an average spark plug might fire 27.5 million to 110 million times. Each time, it vaporizes a few molecules off the spark plug electrodes. Eventually, the spark plug gap widens, and the air-fuel mixture no longer ignites efficiently. Other engine problems might contaminate the spark plug, and in certain circumstances, it may not fire at all. more
How can you tell if your spark plugs need attention? Your engine is a fine-tuned machine, and performance, fuel economy, and reliability are dependent on consistent delivery of air, fuel, and spark. Here are seven signs of spark plug problems.
Being observant is key to keeping a reliable car, and recognizing spark plug problems early can improve fuel economy and prevent you from being stranded. If you have any questions about your spark plugs, be sure to check with a trusted professional. [links]
We don't want to flood the engine with fuel. Therefore as a best practice, it is recommended to unplug the electrical connector from the fuel injectors or remove the fuel pump's relay. more
Remove the ignition coil from the spark plug that you want to test. Unplug the ignition coil from the spark plug but keep it connected to the wire harness. more
Place the screwdriver about 1/8" from the engine block. While someone else cranks the engine, you should closely examine the gap between the engine and the screwdriver. If your ignition system is working properly, you should see a spark here. [links]
Stick your screwdriver into the ignition coil or the plug wire boot. [links]
when i replaced the sparkplugs at 174k miles, the tip on sparkplug #4 was also missing.
but car wasnt giving me a check engine light?!
so i've been driving around with just 3 sparkplugs for 50k miles?! (and was still getting 33mpg hwy)
You sure you've got the right plugs? I looked on Rock Auto and a couple of other places and every one lists your plug with a part number that is exactly like yours except has a 6 in place of the 5. Just wonder if you have the right heat range of plugs in there. [links]
Could be poor sparkplug gaps causing some detonation and damage to the plugs or bad fuel fouling them. Hard to really say, but removing the sparkplug will be bad news. Believe me, you will notice a significant difference because you will flood the shit out of that cylinder and get no firing at all. Right now it seems you are still somehow getting spark which is why you didn't notice the issue before. You also could have had it just happen so you may not have driven much with the damaged plug.