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How to stop engine pinging?

(1999 Ford F-150)
in Long Beach, CA on September 18, 2010
My truck starts pinging after reaching normal operating temperature.This occurs under medium acceleration and going up highway grades.No warning lights on dash.
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Popular Answer
on September 18, 2010
You may have a contaminated airflow sensor which will miscalculate airflow and cause pinging and poor performance. You can remove and inspect the airflow sensor for bugs, spiderwebs, oil, dirt. Occasionally, it can be cleaned but they're delicate so be prepared to buy a new one if contamination is found. Usually this causes the engine control computer to detect a fault and set a trouble code. At this time it should turn on the check engine light but it might not. Another thing is that the Exhaust Gas Recirculation (EGR) system may not be working so that should be checked out. If EGR is not working properly, that should set a trouble code too. Without a check engine light on, I'd suspect the airflow sensor and clamps, ducts, etc. Poor quality fuel could cause pinging of course, but I'm assuming you have good fuel in the tank and it still pings.
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on September 18, 2010
Thanks for the info!
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