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.
Advancing the ignition timing helps raise the high-end power while reducing the low end. It also helps get the spark past the ignition delay and run at peak power. Retard Timing causes the spark plug to fire later in the compression stroke.
Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. This includes worn, fouled or damaged spark plugs, bad plug wires or a cracked distributor cap.
If no spark appears, check for broken wires, shorts, grounds or a defective stop switch. Once you have confirmed that the stop switch is working, reconnect the spark plug lead.
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.
If the spark timing is initiated too early, the cylinder may experience detonation and potentially cause damage. If the spark occurs too late, the engine runs flat, makes less power, and may overheat.
The most common signs that your timing belt needs to be replaced include: Ticking noise from under the hood when the engine is running. The engine doesn't start. The engine misfiring while driving.
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 there's no spark or the spark is weak, check the resistance of the wire that connects the ignition coil to the distributor cap. Consult the wire resistance specifications in your repair manual. If resistance is within specifications, continue with the next steps; otherwise, replace the wire and test for spark again.
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.
The most common reasons a Chevrolet Spark won't start are a dead battery, an alternator problem, or failed starter.
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First, the camshaft stops moving, and all timing is lost. Then, the pistons crash into the valves, damaging both parts. Depending on how hard the pistons and valves collide, you might also end up with decimated cylinder walls. The broken timing belt basically takes out this entire portion of the engine.
Ignition timing fully under the control of the engine management system with spark timing determined by the throttle position, engine speed, knock sensor, engine temperature, and manifold vacuum.
Once a timing chain is stretched and has lost its integrity, the chain may skip a gear and lose the necessary coordination leading to an engine misfire. Repeated misfires could indicate a timing chain issue and should be investigated.
With a poor ground the starter ring return path may not allow adequate amps to return to allow a starter to reach the torque and speed to start. Normally, however, with a well tuned car and cranking, the engine will fire right up. Weakness, though, and it may not start.
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.
The battery, a generator and a more complete vehicle electrical system provided a relatively stable electrical supply to the ignition coil.
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.
A failed crankshaft positioning sensor can cause your engine tp have no spark. In most modern ICE engines they all use electronic ignition and engine management systems. Theses systems depend on the signal sent from the crankshaft position sensor to determine what cylinder is coming up on top dead center (TDC).
Driving with a bad timing chain could give you serious engine damage, and it's also dangerous because it could cause your vehicle to stop suddenly without warning. A timing chain typically requires replacement anywhere from 40,000 to 150,000 miles.
If your engine needs to be timed and it's got a distributor and a timing belt, it's probably a candidate for static timing. Static timing means that the engine's timing is set without actually running the engine.
To adjust your timing, all you need to do is turn the distributor housing one direction or the other, depending on whether or not you want to advance or move back the timing. If the rotor turns clockwise, you'll advance the timing by rotating the distributor counterclockwise, and vice versa.