"“Spark is only one thing you need for combustion. You also need compression. So pull the plugs back out and check the compression.”"
The OP said # 4 was not firing consistantly. Does that sound like a lack of compression??
"“Spark is only one thing you need for combustion. You also need compression. So pull the plugs back out and check the compression.”"
The OP said # 4 was not firing consistantly. Does that sound like a lack of compression??