what does this gizmo do specifically? I unplugged it, trying to search out my lambda sensor code, and it did nothing. No new code, no change whatsoever. I am wondering if this is my problem?
V-Tec Solenoid
what does this gizmo do specifically? I unplugged it, trying to search out my lambda sensor code, and it did nothing. No new code, no change whatsoever. I am wondering if this is my problem?
The VTEC system switches the cams between a low-lift and high-lift profile, not sure if that's used in the F-Fit application, but you can learn more here:
https://en.wikipedia.org/wiki/VTEC
Thanks David. It must be used to some extent. The HPD harness has a plug on it for the V-TEC.Originally Posted by David Ferguson
I'll post what I find out, and I will!
The short version is that the solenoid opens up another oil passage in the head, which pressurizes some little cylinders in each of the rockers, which locks another set of rockers into place & engages the 2nd cam profile.
On the World Challenge cars we could adjust it (all you really need is the equivalent of an adjustable shift light), although there didn't seem to be much of a performance edge to be had even with a ported head.
One car had the system locked "on" all the time (he basically put some pins in place of the cylinders). It idled like crap & tended to cause excessive wear on the cams at low RPM.
It's operational on the Fits, IIRC it kicks in around 5,200 RPM and probably around 40% throttle.
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