Disable VCM?

2009 HONDA ACCORD
181,000 MILES • 3.5L • 6 CYL • 2WD • AUTOMATIC
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BENJAMINTHERERRIBLE
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What are my options for disabling the J35's VCM? or is it safer to leave it as is? I've heard that VCM actually can do a great deal of damage to the motor, but I cannot say how credible that information is, not to mention makes it nearly impossible to do an my kind of performance upgrades.
Oct 2, 2020 at 9:12 PM
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ASEMASTER6371
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Good morning,

Why do you want to disable it? I would definitely not do this at all. It will effect many systems.

Do you have a specific issue that makes you want to do this?

Roy
Oct 2, 2020 at 9:29 PM
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BENJAMINTHERERRIBLE
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Thinks for the quick reply. As of right now I am not having issues with it. I've just heard/read That Variable cylinder management, Active fuel management, etc. Can have detrimental effects in the long run.
However, this is the Internet after all, so I figured I would check with a more trustworthy source.
Oct 2, 2020 at 9:48 PM
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ASEMASTER6371
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That was not accurate information at all. It does not damage the engine in the long run at all. It is designed to be reliable and at the same time increase efficiency by increasing fuel mileage.

Roy
Oct 2, 2020 at 10:00 PM
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NESIA WILSON
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doesn't seem to be aware of Honda VCM issues.
Mar 18, 2025 at 5:18 AM
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STRAILER
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yep, disabling VCM (Variable Cylinder Management) is a common modification among enthusiasts, as VCM has been known to cause long-term engine wear issues.
Mar 19, 2025 at 3:17 AM
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STRAILER
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A VCM muzzler plugs into the engine coolant temperature sensor and fools the ECM into keeping all cylinders active.
Mar 19, 2025 at 3:18 AM
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