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External Ignitor Urgent Q. Please Help

lukevl

By lukevl,
in Forced Induction Performance

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lukevl Collaborator

lukevl

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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

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MonstaS4 Collaborator

MonstaS4

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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

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lukevl Collaborator

lukevl

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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

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StockyMcStock Proficient

StockyMcStock

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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
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lukevl Collaborator

lukevl

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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.

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MonstaS4 Collaborator

MonstaS4

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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

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lukevl Collaborator

lukevl

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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

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