Howdy, 02 Ford V10 with 90 k miles. Noticed some pinging under hard acceleration. Tried a tank of premium gas - still there. Wondering if any one has had any experience in changing the Knock Sensor...
Check for air leakage in the vehicle's climate-control system, which is driven by engine vacuum from the intake manifold. If it is leaking, then un-metered and un-filtered air can be sucked into the engine intake manifold, causing the air/fuel ratio to lean-out. This can cause pinging.
Ed
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