Garden

Replaced coil still have no spark

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If the ignition coil does not have spark, it`s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil. If both wires are functional but the coil fails to produce spark, the ignition coil or the ignition control module is bad.
If the gap is too great, the engine may not start as easily. If the gap is too small (< 0.30mm), there is the risk that the coil and flywheel might touch as the flywheel heats up and expands when the engine is run. If they touch, the coil will be ruined from a shorting of the iron sheaves.
If you do not see a spark, there is an ignition problem. Remove a plug wire and insert an old spark plug or a spark plug tester into the end of the wire (the plug boot). Place the spark plug on a metal surface on the engine, or ground the spark plug tester to the engine. Then crank the engine to check for a spark.
The starter will not have any impact on the engine`s ability to produce spark. There are a number of issues that may cause an ignition system to not produce spark. A bad crankshaft position (CKP) sensor (on engines that do not have a distributor), or broken, loose or corroded wires from the sensor to the PCM.
The relationship between crank and cam timing events can also cause no spark, especially on Chrysler products. On these vehicles, the PCM won`t trigger the ignition coil if the cam and crank are out-of-sync.
When the high voltage produced by the ignition system is applied between the center electrode and ground electrode of the spark plug, the insulation between the electrodes breaks down, current flows in the discharge phenomenon, and an electrical spark is generated.
What kills ignition coils is location; being mounted in one of the hottest, most vibration prone and dirtiest parts of the engine. Modern ignition coils are typically located between two camshafts on the valve cover and exposed to dirt and oil.
Without the air gap, wastewater could siphon back into the drinking supply. This can happen when a city main is shut off, causing a drain-down of the system with plumbing done improperly. Sometimes it is a hose left in a mud puddle or maybe a hose lying in bleach water. People have died this way.
When couples say they no longer feel a “spark,” it may mean that they`re missing the initial feeling of infatuation or that long-term commitment has become challenging. Meeting your partner and falling in love may have felt exciting, new, and intense. You might have felt that it was the only factor in your life.
The low voltage primary circuit operates at battery voltage (12 to 14.5 volts) and is responsible for generating the signal to fire the spark plug at the exact right time and sending that signal to the ignition coil.
With the ignition switch turned on, primary (battery) current flows from the battery through the ignition switch to the coil primary windings. Primary current is turned on and off by the action of the armature as it revolves past the pickup coil or sensor.
The ohmic resistance of the coil is around 0.2–3.0 Ω on the primary side and around 5–20 kΩ on the secondary side. The winding ratio of primary to secondary winding is 1:100. The technical structure may vary depending on the ignition coil`s area of application.
When any changes are made to the engine of a car, the ignition timing is adjusted accordingly. If not, you could experience several problems with your engine with improper ignition timing like knocking, hard to start, increase fuel usage, overheating, and reduced power.
The proper method to check for spark is with a spark tester. It resembles a spark plug but has a sunken center electrode that simulates a load on the coil. Holding the plug wire and seeing if a spark jumps to ground is inconclusive. The spark is arcing in atmospheric pressure.
A weak spark is the first sign that the ignition coil may be failing. During acceleration, the air and fuel that is forced into the cylinders extinguish whatever spark there is, which causes the car to stall.
Once the ignition switch is prompted by key or the push of a button, it activates the voltage from the battery to the ignition coil to produce the engine spark. The engine spark from the coil or coils is directed to the spark plugs to ignite the fuel to make the vehicle run.
In terms of operation, the spark plug is connected to the high voltage generated by an ignition coil (by way of a conventional distributor or by way of an electronic means). As electricity flows from the coil, a voltage difference develops between the center electrode and ground electrode on the spark plug.
After turning the key, the starter solenoid engages, allowing the power surge from the battery to reach the spark plugs via the spark plug wires. This allows for the spark plug to fire, igniting the fuel/air mixture in the chamber, which moves the piston down.
Water coming out the air gap should not be a regular occurrence, though occasionally it might happen when, for example, someone forgets to run the garbage disposal. Regular water discharge from an air gap points to a restriction in the water flow.
There are three methods that can be used to reveal the presence of an air gap: MCA (Motor Circuit Analysis), CSA (Current Circuit Analysis), and RIC (Rotor Influence Check). While they can point to an air gap, they cannot always reveal if it is getting worse over time and how much eccentricity is actually present.
For part of your car repair and maintenance, you can use WD-40 to remove carbon residue, and keep moisture away from spark plugs and spark plug wires. “WD” stands for Water Displacement. So if your spark plugs are wet or you need to drive moisture away from ignition distributors, WD-40 can help!
Plumbing codes require a minimum air gap spacing or air gap opening of 1 inch (or 25.4 mm), measured vertically.
Pro Tip: Most plumbing codes require a minimum 2″ air gap. For discharge/supply pipes that are larger than 1″ in diameter, the minimum gap distance is usually twice the pipe`s diameter (e.g. a 2″ pipe requires a 4″ air gap).
A wider air gap increases the rotor-stator alignment tolerances, easing installation. However, a wider air gap leads to a weaker magnetic circuit and will reduce the efficiency of the motor.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Correct spark plug gap – Tecumseh Snowblower Snow Blower Starter Handle (Tecumseh)
ANSWER : Correct spark plug gap for 4.3liter 6cylinder 1500 Vandura

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I have mtd large wheel push mower tecumseh model 501039c engine has no spark to plug, coil checks good. i have disconnected the ground wire from the coil that leads to? and grounded the coil to another part of the mower and will get spark to the plug that way. I have not tried running the mower with the coil grounded where I have it. What can be the problem?
ANSWER : I would say if you can get a spark by moving the ground, try running the mower. If it works you should be OK.

Gary

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Runs fine on flat ground will not pull a hill
ANSWER : Sounds like you could be running on one cylinder. I assume you have a two cylinder B&S, Tecumseh, or Kawasaki. Remove one spark plug at a time and try driving the mower. If you have nothing on one spark plug and drives exactly the same with the other, then you have a dead cylinder. Can be a spark problem, unlikely a fuel problem assuming a single carb, a bad head gasket, bent push rods. A lot of B&S Vanguard engines, including mine, have a tendency towards bent push rods.

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Fuel will not go to carb.take fuel line off and crank it over the fuel pours out of the line, the only way it starts is if you pour gas into it directly
ANSWER : Carb float valve stuck not letting fuel into carb body sometimes a light tap on carb may free it up or may have to be removed and cleaned and or float may need to be repaired or replaced

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Engine 8 Hp: gx240 8 hp no spark…
ANSWER : I have one that did the same and found out it was the interanl coil…

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I am having problem with my engine, it wont stay running when u cut the choke off. and i noticed one spark plug is not firing. could this cause it to die when u push choke in????
ANSWER : Yes that could cause it to stall without choke, check plugs, wires, coils and air filter. It could be any one of those.

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No spark on a 126T020675B2 Briggs 6.75 hp mower engine
ANSWER : Gap needs to be 10 thousands of a inch done with a brass feeler gauge ..mag/flywheel has a spot with a magnetic field if you look you can see it it should make a 1/2 wrench stick to it if not replace mag/flywheel ..check key way also

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What is the spark plug gap for a ryobi string trimmer model # ry30550 ?
ANSWER : I can’t say for sure, but it’s PROBABLY about 0.035″.

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