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+1 on the pinging. If you hear it, you've got problems. The V-6 has one sensor for each cylinder - very sophisto...
A small addition to what was said above regarding altitude: it's not just that there's less oxygen at higher altitudes, there's less atmospheric pressure. So compressing air/fuel mixtures at say 5000 feet altitude means that the effective compression ratio yields less cylinder pressure. A lower octane fuel is called for in that case and will work fine. Higher octane fuel would not burn completely and cause fouling and carbon deposits.
Please correct any misstatements above. I sell floorcovering and am not any real mechanic. But my bed is as comfortable as those at a Holiday Inn Express.
John B.
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 12 LS M6, IPF S/C, ASA GT-5 wheels, VMax PTB
1995 Mitsubishi Montero SR
1987 Dodge Raider Turbo Project
1986 Mitsubishi Montero 2.4l FI Transplant |