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Pinging/knocking

Old Sep 3, 2019 | 12:43 PM
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Default Pinging/knocking

Yesterday I had to stomp on it to get around some bicycles. I hit it hard and notices some slight pinging/knocking at first. What is the cause of this and how do you fix it.

2001 base vert, automatic. Only mods are cold air intake and axel back exhaust.
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Old Sep 3, 2019 | 01:39 PM
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what fuel do you use and how hard do you drive it ???? top of the pistons and heads could have a build up of carbon, use a top engine cleaner for that, use 91 or higher octane ????
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Old Sep 3, 2019 | 02:33 PM
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Originally Posted by Pounder
what fuel do you use and how hard do you drive it ???? top of the pistons and heads could have a build up of carbon, use a top engine cleaner for that, use 91 or higher octane ????
Always 91 octane and have been using lucas oil gas additive for the last couple of fillups. Maybe I can use some Techron? But I live at almost 5000 feet and I heard at that altitude you can go with lower octane? I still use 91 octane from Costco.

I really don't drive it that hard. I do occasionally get on it but not that often. I don't know how it was driven by previous owners.


Last edited by lunaticfringe007; Sep 3, 2019 at 03:31 PM.
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Old Sep 3, 2019 | 03:14 PM
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I agree with Pounder !!...try some GM Top End Cleaner...I used 2 bottles as some preventative maintenance a few months ago...1 can into the PCV and the other can through the Brake Booster !!...the back of my valves are probably clean as a whistle...none of those pesky P0300 misfires which are difficult to diagnose in that area !!
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