Bronco 'Pings'

courtesy of Bob, The Auto Answer Man

I have an '89 Bronco with a 302 cu. in. motor. I had a neighborhood mechanic give the truck a tune-up(replace plugs, check timing, etc.). Now I have a pinging when I accelerate. I brought it back to him 3 times for this. I have tried higher-octane fuel, driving the truck in Drive (rather than overdrive) and still have the problem. The mechanic says everything is in spec and can't find anything wrong. He suspects a transmission problem. I have not had the transmission serviced since I bought it new. The fluid is clean and at the correct level. Is this a possibility? What should I look for in a reputable shop? Thanks for any help you can give me.

Sounds like he did not set the timing correctly. I would have him or you do the timing procedure exactly as it is in the service manual.
Good Luck!
Drive Safely!
Bob, The Auto Answer Man

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