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#1
10-04-2004, 01:34 PM
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92 LS 400 Pinging
I have a 92 LS 400 with 172,000 miles. Recently it has started pinging. It seems to ping after it gets warm and only between 1,000 and 2,000 RPM. Beyond that the pinging goes away. I have checked the valve clearance and they seem to be under spec. The timming is correct as well. Any ideas?
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#2
03-30-2005, 11:17 PM
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Re: 92 LS 400 Pinging
Could it be regular gas? I hope not as that
is what I plan to use in my recently aquired '90 LS400 Probably an anti-knock sensor not telling the computer to back off timing advance.
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