Just did a quick google search of some of the most common reasons that cause ignition failure.
Not saying that it is one of the reasons but I had recently got rid of that plastic valve cover as I don’t see what purpose it serve other then cosmetic and may keep some debris from collect on the valve cover, I think? Plus I had remove that weather striping at the rear of the hood area to let some of the heat to escape from under the hood. Keep in mind that you will smell some exhaust gas from the engine bay drawn into your cabin through the vents. That happens only when the car is not moving. Once the car is in motion, it is all fine.
I had done this plus other measures for my Cobalt to improve the under hood temperature.
Fwiw.
Experiencing loss of power or poor acceleration? These are some of the bad ignition coil symptoms. Find out the other signs, causes, precautions, and more.
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4 Causes of Ignition Coil Failure
Ignition coils usually last long but can fail prematurely for various reasons, such as a bad spark plug, heat, faulty coil wiring, fuel leaks, etc.
Here are the main causes of ignition coil failure:
1. Exposure to High Temperatures
When the ignition coil gets overheated, its ability to conduct electricity is hampered. Exposure to multiple heat cycles and high temperatures can cause the ignition coil to deteriorate faster than usual.
An overheated ignition coil can cause
complete failure of the vehicle’s ignition system.
2. Damaged Spark Plug
Worn spark plugs can put more load on the ignition coil, forcing them to overcompensate and operate at a higher voltage.
The voltage overload can overheat the ignition coils and cause them to fail.
3. Engine Vibrations
Excessive vibrations can occur due to an engine misfire or problems associated with the spark plugs. Either way, it can significantly damage the ignition coil windings (primary coil and secondary coil) and their surrounding insulation.
It can also cause shorts or breaks in the secondary coil windings, leading to ignition coil malfunction.
4. Moisture
Moisture can damage the seal between the valve cover and the ignition coils.
Once the moisture spreads around the spark plugs and ignition coil, it can cause unwanted oxidation and corrosion, leading to a bad coil pack or complete ignition coil failure.
