Vtec seems "off"
09-10-2003, 12:11 PM
#14
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I believe that if you maintenance required light is constantly on it does prevent vtec. If it's just flashing I don't think it does. If your car only has 3300 miles on it though I don't think that's an issue.
09-10-2003, 12:42 PM
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If I understand how VTEC works, you will lose torque above 6k if VTEC isn't engaged. In other words, the car will feel like it's "giving out" above 6k, like other cars that have mostly low-end torque. If your car pulls basically the same all the way to 8k, then VTEC is working, even if you don't get the kick.
09-10-2003, 03:06 PM
#18
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Johnyboy - I checked the oil level this afternoon & all looks fine there. Did my own oil change on Saturday, so I know that was done right! 
09-10-2003, 03:21 PM
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Are you sure RiceBurnerTX? I thought VTEC let the engine get as much air as it needed. With any intake/cam system, there is a maximum airflow that can go into the engine per unit of time. When the rpms rise to the level where the engine can use more air than the intake system can deliver, then the horsepower levels off and the torque drops off. If you optimize the intake system for high-rpm intake levels, the low-rpm behavior of the engine gets very rough. Thus the concept of VTEC: Let the engine ingest all the air it wants in VTEC mode, but restrict it to a less agressive mode below VTEC engagement.
If that's how it works, then if VTEC doesn't engage, the engine will not get as much air at higher RPMs than it would with VTEC, reducing high-end power. That reduction in high-end power will manifest itself as a dropping-off of the torque.
If that's how it works, then if VTEC doesn't engage, the engine will not get as much air at higher RPMs than it would with VTEC, reducing high-end power. That reduction in high-end power will manifest itself as a dropping-off of the torque.
