Jump to content
SAU Community

Recommended Posts

Hi I have a VVT Rb25 head (Not sure if its S1 or S2) It has the ignitor on top of the rocker cover. I got a wiring loom from another RB25.

Q1. My Ignitor output has the pins in the following order 1 -2 - 3 - Earth - 4 -5 -6. Is this correct? My wiring Harness goes 1 -2 -3 -4 -5 -6 -Earth. I can change the pins but I need to know wether to believe the box.

Q2. The arrow on the ignitor goes the wrong way. It points back towards the computer. is this right?

Q3. 6 pins into ignitor, 7 pins out (6 signals and earth). Correct?

Please help

1. The pins to the INPUT are 1-2-3-E-5-6-7. Note that this is only pin numbering. They are actually in firing order. i.e. Pin 1 = Cyl 1, P2 = C5, P3 = C3, P4= Earth, P5 = C6, P6 = C2, P7 = C4.

2. Nope. The arrow definately points to the coils.

3. Nope. 7 pins into the ignitor - 6 signals from the ECU and an earth. 6 outputs - to the 6 coils. The power to the coils is via the white wire from the ignition relay.

This pic should help........

rb25diagram5kq.th.jpg

Thanks Monsta. It helped. BUT I have a genuine Nissan coil loom with a 7-pin plug on it- 6 coils and an earth. And I have the other plug which is 6 pins and I assume went to the computer.

So some RBs (Rb20 or different series Rb25) must have 6 pins in and 7 pins out with a different ignitor, and some vice versa

http://www.motec.com.au/drawings/m26.pdf

This shows the wiring like my harness but my ignitor has the earth in the middle (according to the markings on top). For me to believe my ignitor I need to know that there are two different types.

luke on the ECU side of my ignitor there's 7 pins - 1 2 3 G 4 5 6 as you describe. on the coil side there's six pins, each to one coil.

there are, however, two large guage wires on a separate 2-pin plug which bypass the coil and plug into the loom further up. i assume one of these is a ground and one is a switching signal for the tacho input or something that the ECU needs.

edit: your motec diagram is the opposite to what mine appears to be. maybe the GTR ignitor is different to the GTS-T ignitor?

Edited by StockyMcStock

You have the same ignitor as me Niel. I'm guessing the arrow points towards the coil on yours. I think i have figured this out people.

NOTE: Some RBs have an ignitor which has 6 pins in and 7 pins out (thats my harness) and some have it the other way around.

Niel the three wires are; white- coil power, one black one is earth for coils and one is coil one negative signal for what I assume is tacho.

Luke, I find it hard to believe Nissan would change wiring looms/ignitors on the same model & series of engine. I bought my R33 RB25DE engine for the conversion complete with the loom, so i'm sure that what i've mentioned earlier is correct. i.e the arrow DEFINATELY points in the direction of the coils. Maybe you've been given the coil loom off an RB20 or something?

This pic may help.......you can see that the wires at the bottom plug go in under the valley cover. The cables running over the ignitor are for the coil feed and tacho test point.

post-9286-1125713874.jpg

Monsta that is just what I needed to see. And yes Nissan did have a 6 pin in, 7 pin out ignitor. Rb20 is like this with the wiring 123456E; as opposed to having the earth inbetween 3&4.

I will now re-pin the connectors so I have 6 out and I'm set. Thanks monsta

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Good morning all, Bit of a random question but figured I’d finally throw it out after wondering for a long while. Before I start, I'm hoping to do this purely out of personal preference. I think it would look better at night, and don't mind at all spending a few hours and dollars to get it done. I've copied this from a non-Skyline specific forum, so I apologize for the explanation of our headlight switch setup that we all know. Here we go: Zero lights (switch off) Parking lights (switch position 1) being a rectangular marker on the outside of the housing, my low beam being the projector in the centre (position 2), and a high beam triggered by my turn signal stalk. Most North American cars I’ve owned of this era have power to the amber corner (turning indicator) light as part of the first switch (parking lights). I’d love to have these amber corners receive power when the headlights and parking lights are on (headlight switch), yet still blink when using the turn signal which is of course a separate switch. Hopefully I’ve explained my question correctly. Is anyone aware of a way in which I might be able to achieve this? Thanks in advance
    • My heads are cathedral port! It's likely possible, but I don't want to add any extra moving parts (I know they don't move) between the heads, manifolds, etc. It will also affect how injectors/fuel rails etc sit and I don't really know if it would change how the FAST manifold goes/sits/fits. I have the LS6 steam pipes already as I have a very late LS1 block so it should be fine. I couldn't find anyone who had ever actually used one for this purpose, it seems 100% of people grind the water pump. The thermal spacers are 12mm and are half way to the cost of the newer water pump anyhow... so if it comes to that I suppose I'd rather buy a new pump. The bearing in the pump I do have is a little.. clunky, but it hasn't done that much time and I never noticed it when the car was together in the past few years, so..
    • The bushing has failed, not all that uncommon for a car of this age.  Any mechanic should be able to push in a new bushing for you, or you can probably buy the entire lower control arm, complete with bushes.
    • Could you not use "thermal" spacers to give the clearance, like the ones I used between the blower and head? That raised the manifold height by around 10-15mm Albeit the ones I used were for cathedral ports, but I assume they have similar for rectangular ports????
    • Thanks Paul I reached out to Autotainment but they no longer work on JDM cars as the guy who used to do the work moved on and is no longer doing that kind of work. I am talking with Level Up Audio though.
×
×
  • Create New...