Engine Pinging
ftxlcincy
08-07-2010, 02:20 PM
Have a friend with a 2003 F-150 with a 5.4 with 40,000 mile. Started pinging 2 tanks of fuel ago and is not setting any codes. Any ideas ? Thanks
Davescort97
08-12-2010, 01:53 PM
Mixture could be too lean. Check for a vacuum leak. Ignition timing is probably advanced too much.
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