* Tuning/Reprogramming: This is the most common and effective method. A professional tuner can reprogram your vehicle's Engine Control Module (ECM) to disable AFM. This requires a custom tune, which will alter other engine parameters as well, potentially improving performance and/or fuel economy (depending on the tune). This is generally the most expensive option.
* "AFM Delete" Kits: Some companies sell kits that physically modify the intake manifold to prevent the lifters from operating in V4 mode. This is a more involved mechanical solution requiring expertise and often involves removing the intake manifold. It's a more permanent solution, but it also carries the risk of damaging components if not done correctly.
* Trimming Fuel: This is not a true disable, but some tuners can adjust fuel trims to make AFM less likely to engage. It won't completely prevent it, but will significantly reduce its frequency.
Important Considerations:
* Warranty: Modifying your ECM or performing a mechanical AFM delete will almost certainly void your warranty (if you still have one).
* Potential Issues: Disabling AFM can potentially lead to increased engine wear in some cases if not properly addressed by a tune that compensates for the change in cylinder operation. For example, without proper tuning, the remaining cylinders could be subjected to increased stress.
* Cost: Reprogramming typically costs several hundred dollars, while an AFM delete kit and labor can be even more expensive.
Recommendation:
If you're concerned about AFM's effects, the best approach is to consult a reputable automotive tuner specializing in GM vehicles. They can assess your specific needs and recommend the best solution, whether it's a custom tune to disable AFM or another approach. Attempting to disable AFM yourself without proper knowledge could lead to significant engine damage. A mechanical delete, especially, should only be attempted by someone with experience working on engines.
