Mechanics

PINGING ENGINE

2000 Ford F-150 • V8 4WD Automatic • 115,000 miles

I have a 2000 F150 Ford pickup. Over the past few months the engine has been making a pinging noise when accelerating up hills, and occasionally the service engine light goes on and off while it pings and feels like it may stall. I tried different gas stations and grades of fuel, still pinging. My mechanic replaced all the coils, the thermostat and the fuel filter and it's still pinging.

What can cause engine pinging other then what I've addressed?

Thanks!
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Cdourney
March 24, 2011.



Have your mechanic check the knock sensors and ignition timing.