1993 Ford Explorer Malfunction - Engine


Question: My Explorer has a check engine light come on mementarily when I accelerate at high speeds, go over a hill on the expressway, or have a load on the truck. It almost never does it below 50 mph. I can hear a pinging noise, like a spark knock, and it just doesn't have any power. I have brought it to the dealer and they couldn't get any codes out of the computer. Can a bad catalytic converter cause this, or does it sound like a stretched timing chain?

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Technican: Start by cleaning the Mass Airflow Sensor (MAF) element. Use an electrical cleaner. Be gentle enough not to damage the sensor. This is a common problem.

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