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How does a waste-spark ignition system work?
A waste-spark ignition system uses a single ignition coil to fire two spark plugs simultaneously, one for each cylinder in a dual-spark configuration. In a typical setup, one plug ignites the air-fuel mixture during the compression stroke, while the other plug, located in the opposite cylinder, fires at the end of the exhaust stroke, effectively utilizing the wasted spark. This design enhances combustion efficiency, reduces emissions, and improves engine performance, particularly in high-performance engines. The simultaneous firing also simplifies the ignition system by requiring fewer coils.
What type of ignition system fires the spark plug every 360 degrees of crankshaft rotation?
A distributor less system with waste spark.
Why is the procedure for checking the resistance of a waste spark ignition coil different from the procedure for checking other types of ignition coils?
The procedure for checking the resistance of a waste spark ignition coil differs because waste spark coils fire two cylinders simultaneously, using one coil for two spark plugs. This design requires measuring the resistance of the primary and secondary windings in a specific way to account for the dual spark plug system. Additionally, the resistance values may vary between the terminals due to the shared nature of the coil, necessitating a tailored approach to ensure accurate diagnostics. In contrast, other ignition coils typically service a single cylinder and have different resistance expectations and testing methods.
What is the main feature which determines whether the engine is either a coil per plug conventional distributor or DIS system?
The main feature that determines whether an engine uses a coil-per-plug conventional distributor or a Distributorless Ignition System (DIS) is the arrangement and number of ignition coils. In a coil-per-plug system, each spark plug has its own dedicated ignition coil, providing efficient and precise spark delivery. In contrast, a DIS typically uses fewer coils to serve multiple spark plugs, often relying on a waste-spark design. This difference in ignition coil configuration directly influences the engine's performance, efficiency, and reliability.
What type of spark plug is used on waste spark ignition?
On a waste spark system you should use double platinum plugs. Because the cylinders fire on the compression stroke on the positive side and the exhaust stroke on the negative side, copper plugs would burn out very fast. As an example, double platinum plugs are advertised as 100,000 plugs, but I wouldn't go past 50,000 miles due to the possibility of the plug getting stuck in the engine. The copper plug on the same engine would only go about 15,000 miles. Based on the locations of the plug applications on various vehicles, I would not want to change plugs every 15,000 miles.
Why do 2002 Kia spectras have 2 plug wires and gel packs?
The 2002 Kia Spectra uses a design that incorporates two plug wires and gel packs to optimize its ignition system. The two plug wires are part of a waste spark ignition system, where each coil fires two spark plugs simultaneously, improving efficiency and reducing emissions. The gel packs help in managing heat and providing insulation, which enhances the reliability and performance of the ignition components. This design choice reflects the engineering aimed at balancing performance, cost, and durability.
What are the advantages of waste spark?
simplicity of ignition unit, less component, mean cheaper to manufature
Does bad spark plugs give you rough idle?
Bad spark plugs can indeed cause an engine to idle rough. If any of the spark plugs are misfiring or are not producing enough of a spark to ignite the fuel, then not only will the engine idle roughly, it will alwso waste gas. If may seem as though it is running fine when you are driving however, you still may be wasting gas and your pickup may not be as fast as it should.
How many spark plugs are there on a 1991 ford ranger xlt 2.3 liter 4 cylinder engine?
The 1992 model had 8 for sure: 4 for power and 4 for "waste spark." The 1991 model is probably the same and uses the EEC-IV system with OBD-1.
Does a waste spark system have plug wires?
Yes, from the coil to the companion cylinders.
What would cause a 1995 Old Aurora to seem to skip when accelerating to go up a hill and to surge or buck forward when stopped at a light?
Common possibilities: Spark Plugs & Plug Wires. If plugs/wires have more than 80,000 miles on them, consider replacing them.Warning!... use only GM supplied AC-Delco spark plugs. The 32-Valve Northstar engine is very particular about the special dual-tip, dual platinum spark plugs they were designed with.Yes, they're expensive (about $6 each from local autoparts stores), but they last a long time which offsets the price. I replaced mine at 100k, and they were just beginning to act up.Any others will MOST LIKELY result in misfires (like you're experiencing now), reduced gas mileage, and short life.Plug wires can be upgraded with high-performance 8mm helical core wires, but stick with top-grade Bosch or Borg-Warner Select wires. Factory wires are always a safe-bet, but 'can' begin to degrade after 50k miles in high-heat conditions.Side note: As with many late model cars, these cars use half as many ignition coils as there are spark plugs... in a system called Waste Spark ignition, where a single coil fires 2 (opposing) spark plugs. If one spark plug wire is bad, you actually lose full spark power on TWO spark plugs, as they are connected in series. (This is why an engine can begin to run so poorly when just one spark plug wire goes bad, especially on 6-cylinder engines!)This also means that half of your spark plugs are sparking from center-to-ground (normal), and the other half are sparking from ground-to-center (abnormal). This requires that the "Platinum" spark plugs have platinum on both the ground electrodes, as well as the center electrode so that they last as long in either position.Bosch platinum spark plugs are notorious for not working well in waste-spark ignitions, as they (at least, in the past) have not had platinum on their ground electrodes. Half of your plugs would be fine, half would go bad... quickly.AnswerCould also be, and likely, the plenuem backfire relieve door seal leaking. See the response in regards to reasons other then sparg plugs and wires for missing. ANOTHER POSSIBILITY: Idle Speed Sensor/Selenoid. Does this happen when the AC is on?? I love your car, it might have been the most beautifull American car of the last 25 years. Its a shame about Olds demise.....I had the same symptoms. I changed the plugs & wires nothing different. It ended up having a bad ignition coil.
Which spark plug: denso pk20tr11 or ngk bkr6ekpb11 ngk is almost twice the price of denso; both are listed in the manual so is it worth the difference?
Lifted from a post on ToyotaNation.Does yours use the OEM twin ground platinum electrode spark plugs? They are specifically used for the later model Gen 4s (Camry) with twin coil packs and distributorless. These use a waste spark ignition, therefore the plugs fire twice during a 4 stroke cycle. If you use a single ground electrode, it will severely shorten the life of the plug. e.g. 6,000rpm on your Camry engine will be like running 12,000rpm on another car, since the plug fires twice as often. You can also try double platinum plugs, i.e. plugs with a platinum chip also on the ground electrode. What happens in waste spark ignition is that 1 coil pack fires 2 spark plugs simultaneously, e.g. cylinder 1 and cylinder 4. So while one spark plug is firing normally, spark jumps from center electrode to ground electrode, the other spark plug is firing in reverse, i.e. from ground electrode to center electrode, therefore there is high wear on the ground electrode, this is where the platinum chip on the ground electrode gives longevity. Plugs like Denso Iridium SK20R11 and VK20 also have a platinum chip on the ground electrode. NGK Iridium IX and Denso IK20 don't. BOSCH R3 Platinum2 18-3770-8 spark plug is an alternative choice. Had replaced with these spark plugs for 2 years now, so far so good. By the way, the original stock Denso plugs were still very good after 100,000 miles (160,000kms). IMHO that they could go at least 200,000 miles before needing replacement.
