RedDawnFX

Just tested it and it may be my imagination, but it feels like more of a boost. OP have you checked all of your fluid levels? I took my s2k from a Cadillac used dealer to a Honda dealership before buying it and they found a few cosmetic problems, but didn't notice my oil was below the x's on the dipstick or that my coolant was low.

ChefJ

Slows2k is exactly right, as usual. You want to FEEL vtec kick in get yourself an AP1.

negcamber

bioman...any mods on either car?

2007 Zx-10

whatever, the AP2 has a nice kick, right at 6500

I prefer a twin turbo kick at 3800, however...alot more fun

bioman

The '04 was bone stock. This '05 has a grounding kit and a cone air filter.

I checked the oil level and it was about almost 3/4, but I topped it off with half a quart. Nothing really changed. The tone definitely changes at around 6k and I do feel a slight power increase, but nothing like the kick I felt in the '04.

I don't know when the previous owner last changed the oil. But I will be changing the oil and installing some fresh spark plugs along with fuel cleaner next week. Hopefully that will fix it or else its off to the dealer. The '05 does have that Map Sensor TSB done to it, so I think the MAP is fine.

Ray K.

what kind of oil? I felt like the VTEC engagement was much smoother with amsoil 10/30 then with mobil1 10/30.

negcamber

I've been in one car that acted exactly like this. It ended up that one of the pins that locks the high rpm cam lobe was not engaging, which led to only half the cylinders going into VTEC.

shotgunjimmy

you want to feel the vtec kick? get your self a prelude with the H22. gotta be one of the most abrupt vtec trasitions ever.

bioman

Do you happen to know where that wire is located? Maybe I could look in the engine bay to see if these is anything loose specifically.

negcamber

It's not a wire. It's a metal pin in the valve train that is driven by oil pressure. Take a look at this video to understand how VTEC works:

http://www.youtube.com/watch?v=AcT_ZyY3F0k