What would cause intermittent spark?
Intermittent misfires are often caused by a weak spark or a lean fuel mixture. 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.
What is the function of an intermittent pilot?
The intermittent pilot light is an electric system, designed to combat some of the biggest flaws of the standing pilot. Rather than keep a flame burning all the time, the intermittent pilot only lights when needed. The system responds to the command for heat by using an electric spark to ignite the flame.
What causes intermittent engine misfire?
Intermittent misfires are often caused by a weak spark or a lean fuel mixture. The challenge here is figuring out what’s upsetting the fuel mixture or robbing the spark. The underlying cause is often a vacuum leak in the intake manifold or behind the throttle body that allows unmetered air to bypass the airflow sensor.
What is intermittent pilot ignition?
Intermittent Pilot Ignition is an electronic system, which uses an electrode to ignite the pilot gas. In turn, the pilot flame lights the main burner gas. The term Intermittent is used because the pilot burner flame is only present when the main burner is operating.
What causes weak spark on outboard motor?
Weak spark may cause starting and running difficulties as there may not be enough heat generated in the spark to accomplish ignition of the fuel/air mix in the combustion chamber. Common reasons for weak spark are faulty flywheel magnets and faulty stator.
Why does my Honda Pilot have intermittent air conditioning?
Through additional diagnostics I discovered the a/c compressor relay was very intermittent… the root cause of my issue. A quick internet search to see if the Omron relay is available in the aftermarket led me to find the Omron relay, a Honda specific part with a reduced coil current, is known to be problematic.
How does an intermittent pilot on a furnace work?
As the name suggests, an intermittent pilot is not on when the furnace is not firing. Every time the thermostat calls for heat, the pilot light is ignited and proved, before the gas valve opens. This is a typical sequence: The thermostat calls for heat. Gas is allowed to flow through the pilot gas line.
How does the pilot work on a gas thermostat?
Every time the thermostat calls for heat, the pilot light is ignited and proved, before the gas valve opens. This is a typical sequence: The thermostat calls for heat. Gas is allowed to flow through the pilot gas line. (think of it as a spark plug) provides the spark that ignites the pilot flame.
What are the issues with a no spark motor?
Other issues related to a no spark/Weak Spark/Wet Plugs issue: Wrong flywheel on it. Sled was only running on one cylinder. Low side coil on his stator read 360 ohms and it should have measured 450 ohms. The low side coil was bad. It kept fouling plugs left and right. The guy before ran ethanol, and never told the current owner.
What’s the difference between intermittent pilot and standing pilot?
Rather than keep a flame burning all the time, the intermittent pilot only lights when needed. The system responds to the command for heat by using an electric spark to ignite the flame.
What happens when the pilot light goes out?
As long as the thermocouple keeps registering the heat from the pilot light, the flame can stay lit indefinitely. When the flame goes out, the current stops and the gas valve closes. This is a safety measure to prevent the home from filling up with gas.
What kind of ignition source is a standing pilot light?
The standing pilot light is the traditional ignition source for most natural gas-fueled combustion heating systems. It is comprised of a small burner, a gas valve to supply the burner, and a thermocouple.
Why does my furnace have a pilot light?
The pilot light has been a staple of home heating systems for decades. The continuous flame underneath furnaces and boilers across the country has gained wide recognition as the ignition source for the heater. It has also become notorious for going out for no apparent reason.
