Originally Posted by kenton
VTEC doesn't engage when it's low on oil.
I know that VTEC engagement on the i4 is something like 4500 or 4800.
Yeah, I think the problem is that your oil pressure is low. If so, VTEC will
not engage and you won't be able to rev past that point
Originally Posted by 98CoupeV6
But the engine would still rev past that point.
Not really, on the I4 if VTEC engages around 4900RPM's that's when it switches to the higher lobe which demands more oil pressure. But if your car is low on oil, it won't switch over and VTEC will not engage. Thus, the reason of not revving past 4900RPMs in park or a drive gear