The truck has what appears to be a brand new fuel filter. It has a brand new distributor cap and rotor, and the plugs and wires are less than 8k miles new (though i have never checked the gaps).
The valves need adjustment, but that isn't one of my options immediately - too time consuming and/or expensive, depending on how i choose to do it. (do you think the valve clearance could be the reason it is pinging?)
Right now it pings on anything under 91 octane. i have been filling it up with chevron, shell, and 76 premium for the past 2 months. I have tried many fuel additives, including all sorts of octane boosters , and injector cleaners. Right now i'm running a tank of regular 87, to see if the pinging has stopped, but it has not. So i put a bottle of techron in, the first time i have used that treatment. Have also used lucas upper cylinder lubricant. Only thing i have not tried, is a throddle body cleaner that is fed through a vacuum line, such as chemtool's kit or seafoam. What next?
2007-02-06
10:37:53
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4 answers
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asked by
Anonymous