Thread: Is there any way VVL can kick in by itself, no solenoid power?

Gotcha, yea pretty dead up there on lows.

im sure the vavles float like crazy too lol

Yea, uhum. And I must have really messed up my Sentra's stock motor revving it all the way to 6,800 on it's single cam profile.

Seriously, valves floating revving the motor to stock redline.

dude are you not getting it?

the stock motor revved to 6800 fine because it was designed to do so, im pretty sure the stock sr20ve low lobes were not.

you dont have to take my word for it, but im just tryin to save you from some trouble.

I'd be happy with no VVL if it would just stop fluttering around 4k.

maybe thats not your issue.

Well the fact is it probably has nothing to do with the VVL kicking on and off. It sounds like an ignition or fuel issue could make a sound like you describe but from that video i can't hear anything. Just sounds like resonance in the car. Definitely not like vvl anway.

New dizzy, and tried 2 different pumps, though they are both old. I'm pretty sure the sound comes with a power surge because with the sound tires break lose when VVL kicks in. Without the louder component of the sound, power is less and no tire spin.

What's got me thinking is that everything works well 90% of the time when I take a hard right turn and take off. But if there is a pump, pickup or pressure issue, why does it flutter in and out around 4k.

I really gotta get an oil pressure gauge on but money is too tight right now.

Leads and plugs? A dodgy wiring connection in your distributor wiring that works most of the time but starts to break down at higher rpm? There are lots of possibilities.

New plugs, wires dizzy (loaded), battery, B15 alit (used). I don't doubt ignition, it's just my gut is telling me VVL. Even though it seems impossible. What I wouldn't give for a new '99 P11 harness. I'd even go out in my unheated 15 degree garage and change it out. My sanity depends on a smooth running engine. It's not rational but there we are.

I don't doubt that the harness may have some issues. I tested it well enough but as an audio tech I know old copper sucks! Voltages drop and when you are reading between .45 and 5 volts a 2 volt drop is common and has big impact. The boy I bought this G20 from hacked it to hell, the VE came shipped with nothing covered, bare and wired to a pine pallet and it was all supposed to be a project car for my now 16 year old son. I was laid off, my Sentra got totaled and now this became my daily. Total frontline but pretty standard really.

Maybe the key is to start with the surge, noise increase, at 4k. What would cause a noise increase equal to the VVL exhaust?