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Old 03-17-2013, 06:30 PM   #1
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Default vvt tuner wiring help!

I'm hoping I can get some help quick. I'm pretty bad at wiring. So help is appreciated.

Looking at the diagrams I think I can tap into all the sensor wires except the power wires? Or can I tap the power wires too? I ask because the vvt tuner diagram only as 1 12v input and the rest of power wires are labeled as outputs.

Hopefully I'm making sense and not sounding stupid
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Old 03-17-2013, 06:38 PM   #2
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what car, what engine? My VVTuner is running on my 94 car so the wiring is completely independant of the engines.....Sorry, not much help
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Old 03-17-2013, 06:41 PM   #3
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01. I wired directly to the sensors but wasn't sure it I just cut the original power wire and soldered one to it from the vvt tuner only or if I can tap to the power wire.

I feel like I did this a dumb way.
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Old 03-17-2013, 06:45 PM   #4
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why are you using VVTuner with 01 car?
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Old 03-17-2013, 06:47 PM   #5
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Quote:
Originally Posted by Amellrotts View Post
why are you using VVTuner with 01 car?
Because turbo and megasquirt and my megasquirt can't control vvt and not controlling makes it suck
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Old 03-17-2013, 06:53 PM   #6
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awwww, I see the picture now.
I think you are fine to tap into the sensors. Is the megasquirt using the input from those sensors? The VVTuner manual talks about doing this. It is on the DIY website, I remember reading it but since it did not apply to my situation I didn't pay attention to it. I am sure you can find the information you want there. Good luck!
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Old 03-17-2013, 06:55 PM   #7
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Thanks, I suck at wiring and apparently searching. I find the diyautotune site in general to be pretty tough to navigate, but I am a noob.
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Old 03-17-2013, 06:58 PM   #8
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yeah, it is not the best and I am right there with you......I printed out a book and read it a hundred times before I did my VVTunner install. I hope you get it worked out.....
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Old 03-17-2013, 07:00 PM   #9
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I've been going over it for awhile. Then the person soldering decided we should just tap into the wires...then I saw the input output thing and got worried. I'm not trying to over power stuff.
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Old 03-17-2013, 07:07 PM   #10
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Hmmm could it be I'm an idiot (I know I am) and I should've just left the power wires alone? Because they're still getting power so I don't need to power them via the vvt tuner?
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Old 03-17-2013, 07:25 PM   #11
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I'm pretty sure that I didn't need to f with the power wires. I totally forgot it was designed for putting vvt engines in cars that didn't have vvt so there is no connection to the main harness for it and therefore the unit would need to provide power to the sensors...
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Old 03-23-2013, 01:15 AM   #12
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I need help like mad bad. Unit gets power. However when the key is in the acc postion you can hear an audible click of something switching in the engine bay. Additionally the lights flickered when this clicking happened.

Here's how the unit is setup.
12v in with 5amp fuse
System ground
Crankshaft signal input
Camshaft signal input
The two wires going to the oil control valve

The car will not turn on. It just cranks and does a weird little stutter thing sometimes. The unit also got hot. When starting the car after unplugging the unit it was a little hesitant at first but after a second it seemed to be alright.

I'm really confused any help would be very appreciated.
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Old 03-23-2013, 10:02 AM   #13
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how about you post what wires (with colors) you have exactly where on the harness?

maybe like this:

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Old 03-23-2013, 10:17 AM   #14
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That's not a nb2 miata harness is it? I pulled the cam and crank sensor signal directly from the wires off the sensors because I'm stupid. Same thing with the ocv I have the wires from the sensor pigtail. Ill work on getting a fancy picture like that.
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Old 03-24-2013, 12:18 AM   #15
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So I was fooling with the car again tonight...annnnd the unit started to melt. So I'm a lot a bit confused. I've emailed DIY to see what they say.
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Old 04-08-2013, 11:52 PM   #16
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Update for everyone.

I received my replacement vvt tuner unit. I then soldiered on the cup connector myself this time. I didn't get to try and fire it up. But I did let it sit with power to the unit for a little and it didn't seem to get hot like it did last time. My issues may have been from the pretty crappy soldier job on the connecter. When I pulled it apart one wired wasn't even really attached and it looked like some of the soldier was actually connecting the power input with another pin...So hopefully my issues will be gone. I shall report back with results.
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Old 04-09-2013, 06:43 PM   #17
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No luck. The unit still gets extremely hot when I try to start the car with it attached.

Edit: I'm going to triple check all my signal wires again. As well as pull power from somewhere else and ground somewhere else. I might even pull the signal for the crank and cam sensors from somewhere else too.

Last edited by gorillazfan1023; 04-09-2013 at 06:56 PM.
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Old 04-13-2013, 03:07 PM   #18
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Ok I need help... So I checked my power and ground. It gets 12v when the ignition is on. When I crank it drops to about 9v and then goes to ~14.5v when the car is running. I'm kinda dumb is it ok that its 14v after the car is running or is that bad?

Also when I stop cranking the car (with the unit plugged in) it starts clicking and flicking the gauges like if you've ever started a car that has a wet battery, how all the stuff will flicker and what not.

I can post exactly how I have it wired but Ben said it looked good.
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Old 04-13-2013, 04:17 PM   #19
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Quote:
Originally Posted by gorillazfan1023 View Post
Ok I need help... So I checked my power and ground. It gets 12v when the ignition is on. When I crank it drops to about 9v and then goes to ~14.5v when the car is running. I'm kinda dumb is it ok that its 14v after the car is running or is that bad?
sounds normal.


how exactly/where do you have it wired?
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Old 04-13-2013, 04:23 PM   #20
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It turns out I made a wiring mistake... It was getting to much power. Fixed it and it didn't fire but it also didn't get stupid hot either

I'm just going to redo my whole little harness. Also might try a different vacuum source (I tee'd in where my boost gauge and map sensor get vac from).

This is so embarrassing face palm to the max.
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