FAQ: Why Wont A 9n Tractor Fire No Spark?

What causes no spark to the spark plug?

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.

How do you check the coil on a 9N Ford tractor?

Open the hood of the Ford 9N tractor, then disconnect both battery terminals. Remove all wires connecting to the ignition coil and remove the coil from its harness. Turn on the digital multimeter and switch its measurement dial to the ohm setting.

How do I fix no spark?

First Confirm Your Engine Has No Spark.

  1. Disable the fuel system by removing the fuel pump fuse or relay.
  2. Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine.
  3. Finally, Have someone crank the engine and watch for spark.
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Can a bad ground cause no spark?

Bad grounds can cause no spark issues though. It can cause the ground to ground through the ecu frying it. If you get a single spark when turning on the ignition then nothing when cranking it’s the ecu.

Can ignition switch cause no spark?

A bad Crankshaft Position sensor is a common cause of no starts. The signal from this sensor goes to the PCM or ignition module that switches the ignition coil(s) on and off. In ignition systems with a single coil and distributor, a bad coil or a cracked distributor cap or rotor can prevent the spark plugs from firing.

How do you set the timing on a 9N Ford tractor?

Re: timing the ford 9n series You can adjust the ignition timing by loosening the screw and pushing up or down on the screw to move the distributor plate. Some N series tractors have timing marks on the flywheel wheel that you can see through an opening in the clutch housing on the right side of the tractor.

How do you test a 12 volt tractor coil?

To check a 12 volt coil, set the multimeter to at least a 200 Ohms setting. Attach both leads of the meter to the coil -terminals with black to the negative terminal and red to the positive one. The normal, acceptable range for a standard 12 – volt car is 1.5 to 1.7 Ohms. See if the reading is within this range.

How do you test an 8N ignition coil?

How to Test the Coil on a Ford 8N

  1. Remove one of the spark plugs using a socket wrench and a spark plug socket: the forward-most plug is the easiest. Place the spark plug end back into the wire.
  2. Place the end of the spark plug against a ground such as the engine block.
  3. Locate the ignition coil.
  4. Set the multimeter to the ohms setting.
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What would cause a coil not to fire?

There are a few reasons for no spark, new coil pack could be defective, crank sensor, ignition module or bad wire in primary circuit, faulty ECM/PCM. You may have to have a good technician have a look, diagnose and estimate repair. Second link gives detailed instructions for testing and diagnosing coil pack.

What are the signs of a bad ignition module?

Signs of a Bad Ignition Module

  • Acceleration Issues. The vehicle may shake, vibrate or jerk when the gas pedal is pressed. There may be hesitation or lack of power during increases in speed.
  • Temperature Problems. A faulty ignition module can cause a vehicle to overheat.
  • No Power. The engine may turn over without starting.

Will a bad cam sensor cause no spark?

If the camshaft position sensor is malfunctioning, the computer may not be able to determine the correct time to fire the ignition coils, and there may end up being no spark.

How do I know if my tractor coil is bad?

If the tractor starts & runs fine for 30 minutes or an hour then cuts off & refuses to re-start, and you checked for spark at the plugs & it had no spark at all, AND you have the correct voltage at the coil that’s a good sign that you have a bad coil.

How do you know if you have a weak spark?

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.

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