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docs: update wiring/Injector_wiring
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---
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title: Injector_wiring
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description:
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published: true
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date: 2020-01-06T05:07:36.786Z
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tags:
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---
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Introduction
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------------
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@ -23,7 +31,7 @@ For these configurations, each injector is wired into it's own output from the S
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For 4 cylinders/injectors, there are 2 ways that these can be connected to Speeduino:
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**Method 1**
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#### Method 1
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The standard method is the same as that used for 6 or 8 cylinder setups, where 2 injectors are connected to each injector channel. In this configuration, only 2 injector channels will be used. The injectors paired together must have their Top Dead Centres (TDC) 360 crank degrees apart.
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@ -31,16 +39,17 @@ The standard method is the same as that used for 6 or 8 cylinder setups, where 2
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<img src="https://raw.githubusercontent.com/speeduino/wiki/master/wiring/inj_4Cyl_semi-seq.png" title="Semi-sequential" width="50%" />
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</center>
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**Method 2**
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#### Method 2
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This method is only available on 4 cylinder / 4 injector applications and allows you to wire 1 injector per channel. The injector channels always fire in numerical order (ie 1, 2, 3, 4) so your injectors should be wired to take your firing order into account. Within Tuner Studio, this option can be enabled by selecting:
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`Settings` `->` `Engine` `Constants` `->` `Injector` `Timing` `->` `Semi-Sequential`
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`Settings -> Engine Constants -> Injector Timing -> Semi-Sequential`
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<center>
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<img src="https://raw.githubusercontent.com/speeduino/wiki/master/wiring/inj_4Cyl_seq.png" title="4 Cylinder Sequential" width="50%" />
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</center>
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### 5 injectors
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5 cylinder setups should be wired to use all 4 injector outputs with 2 injectors sharing output \#3. For the typical inline 5 cylinder firing order (1-2-4-5-3), injectors 4 and 3 would be joined together on injector 3 output.
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@ -57,11 +66,13 @@ For setups with more than 4 injectors, the number of outputs used will be equal
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<img src="https://raw.githubusercontent.com/speeduino/wiki/master/wiring/inj_6Cyl_semi-seq.png" title="6 Cylinder Semi-sequential" width="50%" />
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</center>
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**8 Cylinder**
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<center>
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<img src="https://raw.githubusercontent.com/speeduino/wiki/master/wiring/inj_8Cyl_semi-seq.png" title="8 Cylinder Semi-sequential" width="50%" />
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</center>
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Inline with the above, this configuration requires each injector output to be connected to 2 injectors.
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The injectors should be grouped in opposing pairs, that is, cylinders whose Top Dead Centres are 360 degrees apart.
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