The VTEC on my 2006, up until recently, would kick in around 6200 rpm. Now it kicks in at 7200 rpm. The weather has been super hot so I don't think that would have an affect since the VTEC is a mechanical function. Anyone else experience this? Any ideas? Thanks!
This is new to me My 06 Vtech kick in as 6400 RPM just like the spec called out. Let see if other have any idea.
Here are diagrams on how it functions, taken from a 2002 manual when RPM was 6800, they dropped RPM to 6400 later years. View attachment 25904 View attachment 25905 Click on images to enlarge so you can read them. As you can see it is a combination of electronic and mechanical. The ECM tells it when and oil pressure engages. What is causing your problem, I have no clue except after working on engine, something has been disturbed (connector?), proper oil level?
The OP posted one and have not return since Jul :jaw: Thanks for all your great response fellars :thumbsup:
Even my 07 vtec cuts in around 6400. I would check the connections from the ecu to the solenoids. Also since the system is a hydralic system, when is the last time you changed oil? What are you running for viscosity? Too light and when it gets hot out your oil pressure drops a bit, but higher rpms will usually bring it back up. Your vtec is coming on so you know its not a mechanical failure. So eliminate the other two aspects of that system and then the only thing left is the ecu. The ecu can be checked by your honda dealer.
Just in case anyone see's this from a forum search, it's still not a bad idea to have this info. Does it always kick in at 7400 or only when cold? Could also be a faulty thermostat.
For the 6th gen there are two splits 02 to 05 (not absolutely sure if 05 or 06) its 6800, later years its 6400 kick in. It drops out (or supposed to) at 7200 on the rev down but mine has held it in vtec right down to 6000. That seems more to do with how warm the bike is. Vtec isnt supposed to be available until 65deg C (individual electric thermostat depending) so make sure the bike is warmed up for proper testing.
