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What's up fellas, I just purchased a 2010 ford f150 XLT with a 5.4 engine. When I step on the gas, I hear a pinging noise. I took it to the dealer and they said this is common with this engine. They told me to use a higher octane fuel. Is this true anyone has had this problem? I switch gas but still the pinging is there. Need some advise !
 

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Mercury C557
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Welcome to FiN, javy10


I'm not mechanic enough to know but googled for you

- Fuel octane rating too low.
- Compression too high. (usually caused by carbon build up inside the combustion chambers)
- Over heating of the engine or just an individual cylinder. (Hot spots)
- Knock detector faulty.
- Ignition timing over advanced due to incorrect setting or erratic ignition due to a worn distributor. Most modern engines no longer have distributors.
- Blocked exhaust, giving a high backpressure. (A significant loss of performance will be noticed)

Note: The tendency to pinging is highest when the engine runs on the ideal air fuel mixture. (14:1) Therefore a mixture problem -running too lean or too rich- will not cause engine to ping.
 
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