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  1. #1
    Engine Builder
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    Default How to: Wire up your MSD RPM activated switch for your VVL

    I TAKE NO RESPONSIBILITY FOR ANY MISTAKES, OR FAILURES IN ATTEMPTING THIS. YOU DO SO AT YOUR OWN RISK. Take your time and do it right the first time to avoid any problems.

    I'm going to show you how to wire up your MSD RPM activated switch to your VVL solenoids. I used the MSD 8950 because I'm a broke b*tch and it was only $30. As far as I know they are all the same as far as wiring goes.

    From the MSD box:
    RED - Power
    YELLOW - Cam activation (either set of cam wires)
    BLACK - Ground
    White - RPM signal wire (#3 wire light blue with orange stripe in the ECU plug)
    GRAY - not used

    From your cams:
    There should be two brown wires, one per solenoid. Run those together.
    Run the other two wires together.
    Decide which set you want to be power and which set ground. The solenoids have no polarity, so it does not matter which.
    One pair - YELLOW MSD
    Other pair - run withRED MSD to power source

    Now for some pictures. You can mount yours wherever you'd like, but this is how I did mine.




    Run the white MSD wire into the passenger compartment and splice it into #3 light blue with orange stripe wire on the ECU plug. The wire in my hand with the black wire already soldered into it.



    Last edited by LukaMcCloud; 10-26-09 at 01:23 PM.
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    Lance

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  2. #2
    Engine Builder
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    Default

    Edited and updated
    Lance

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  3. #3
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    Default

    Fixed.
    Lance

    Contact me if you'd like to discuss having your engine rebuilt or if you want a custom built engine.

  4. #4
    Toyota Parts Master
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    Nice!
    Sold: 96' 200sx SE-R VE
    Current: 08' Tundra SR5
    Future: I have no #$%^& idea...

  5. #5
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    Default

    I cant see pics.

  6. #6
    Engine Builder
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    Default

    Quote Originally Posted by jagy View Post
    I cant see pics.
    Pics are working.
    Lance

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  7. #7
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    sO U DON'T NEED A RELAY RIGHT?

    I heard i needed a relay to be able to get it to work

  8. #8
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    Default

    I read that in the original thread on the old forum from 2002. I've been reading recently and nowhere did I read that a relay was necessary. I don't have a problem with mine. The relay will just make it so the power only goes to the switch when the ignition is on. I didn't feel like tracing down a switched power wire, although I could have just gone off of the distributor or something. I did it this way and it works fine. No problems.
    Lance

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  9. #9
    The Rough Neck Mandingo.
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    Great job Luk.
    COMING FOR THAT NUMBER 8 SPOT!!!!!!

  10. #10
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    Default

    Thanks, buddy.

    Lance
    Lance

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  11. #11
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    Great write up I needed this!

  12. #12
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    luk, my solenoids did not come with pigtails, so I am unsure which are the 'brown' ones you mentioned. Could you please take the harness off the solenoids themselves and indicate which pins are the 'brown' wires you mentioned? Basically, you can say that the knock sensor like solenoid clip has 3 guides on it, the left, the right, and the top. Looking at the solenoid with the top pointing up, the right pin is the 'brown' wire, and indicate the same for the other pigtail stating that the push button is considered the 'top'. Know what I mean?

    Here's a picture to help what I mean:

    Last edited by canx2k; 12-13-09 at 12:23 AM.

  13. #13
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    If you look at my first picture, the green plug, it would be the wire to the right of the release. So looking directly at the plugs from the front of the car, the left plug is the top wire, the right plug is the bottom wire. Those two go together then the other two go together. It does not matter which way you wire them (+,-) since they do not have a polarity.
    Lance

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  14. #14
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    exactly what I need. so really even if I hooked up a 'brown' wire to a non 'brown' wire, it doesn't matter then, as long as one set is positive 12V and one is grounded - yes?
    Last edited by canx2k; 12-13-09 at 04:32 PM.

  15. #15
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    I believe so, but am not entirely sure since I've read in a couple threads that they both have to be wired the same. However, since they have no polarity it shouldn't really matter.
    Lance

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  16. #16
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    one last question luk, what 12V ign power source did you tap into?

  17. #17
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    I think this should be said:

    the msd 8969 solenoid WILL complete the circuit when it is not getting 12V power and the car is running.

  18. #18
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    I just jumped straight from my battery for the power.

    And I don't know about the 8969 but did you maybe wire it wrong? It shouldn't complete the circuit like that. Or maybe you haven't set the switch points yet?
    Lance

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  19. #19
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    nope, it's wired correctly.

  20. #20
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    Well that's just wierd. I'd ask in the VE section or something if anybody else using that switch has had that problem.

    Is it switching your cams over at idle?
    Lance

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  21. #21
    building...
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    can you get the rpm signal off the orange and blue wire by the dizzy, or is there a reason that it should be run all the way back to the ECU?

  22. #22
    guam guam power
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    i have mine like you mentioned in the engine bay. I didnt feel the need to run it all the way back to the ecu when its the same wire either way.
    Big man little car

    Keep regurgitating bullshit info while other people push the game to a whole different level

  23. #23
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    ^ no problems?

  24. #24
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    Quote Originally Posted by morgans432 View Post
    i have mine like you mentioned in the engine bay. I didnt feel the need to run it all the way back to the ecu when its the same wire either way.
    exactly which wire in the engine bay did you use? I am having no luck by the ECU and my wiring schematic doesn't match everything thats on the car color for color

  25. #25
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    If you pull the signal from the engine bay you'll get a choppy cam activation. Getting signal from the ECU gives the best signal to the switch. You have to use the wire that comes from pin #3 on the ECU.
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  26. #26
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    Have you ran the power from else where? Running it directly from the battery would mean the MSD switch is always on.
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  27. #27
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    Hey luke you say that you use #3 wire blue/orange from ecu for rpm signal, is this for a b14 because other people say use the black/blue wire from the ecu or is that for b13 ecu. I have a b13 and getting no signal from blue/orange wire off ecu

  28. #28
    proud dad
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    For the b13 is the blue wire with black line

  29. #29
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    Quote Originally Posted by j-feli View Post
    For the b13 is the blue wire with black line
    so its a solid dark blue wire with a black line on b13 se-re's?
    860 CT ALLMOTOR VE

  30. #30
    Proud SR20 Owner
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    Where can I connect my MSD power wire, so that my MSD box isn't always on?
    Nissan 200SX SE-R

  31. #31
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    Bump. Also looking for the solution to the always on MSD box.
    04 Subaru FXT

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  32. #32
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    Run it right off your ignition.

  33. #33
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    And what wire is that in the bay perhaps?

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    04 Subaru FXT

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  34. #34
    Moderate Yourself
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    What RPM do you guys have yours set at for activation? I'm at 5200
    Jordan
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    '92 SE-R VVL
    '05 Sentra 1.8S DD & '08 Escape Hybrid

  35. #35
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    4700 here
    04 Subaru FXT

    Quote Originally Posted by Jeremiah 29:11
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  36. #36
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    Im at 4800

  37. #37
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    Guessing RPM's wont give you the optimal switch points. I've used Virtual Dyno with great success tuning out activation points. Just data log a low cam only run and high camp only run, plot them on the graph, and where low cam stops making power is where you should activate high cam. This makes it super seamless powerband wise.
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  38. #38
    gtir powered
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    nice info will need this soon

  39. #39
    Moderate Yourself
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    I have a more general question - where do you guys mount your MSD boxes? Right now mine is just sorta hanging out on the passenger side floor by the ECU.. but I want to put it somewhere I can see it/access it better. The problem is, it was wired with very little slack, so there's not many options. This may be a dumb question, but do I need a special gauge of wire to splice into it to mount it somewhere better?
    Jordan
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  40. #40
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    Mine like a few is in the engine bay up abouve where the clutch cable comes through the firewall. I love that location for it, or in the glovebox is anotehr good spot.
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