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Old 04-18-2014, 11:44 AM   #1
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Default Can I run semi-sequential on a 1.6 without changing wiring?

And if so, should I?

Hey guys, just trying to get my idle smoother. Its a 1992 1.6 with a rev build ms3. Right now the idle jumps around a bit and is also pig rich around 11.0 afr. Still getting the closed loop tuned correctly but I keep reading about sequential injection. I know I need some wiring modification to run fully sequential, but what about semi?
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Old 04-18-2014, 11:47 AM   #2
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Please explain to me what semi-sequential means.
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Old 04-18-2014, 11:48 AM   #3
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what injectors are you running?

semi-seq. will allow you to run injection timing, but won't really help much in your poor tuning regard.
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Old 04-18-2014, 11:56 AM   #4
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18, I can tell you I dont understand it fully. I know the 1.6 runs batch injection stock which fires 2 injectors at once, and as far as I can tell semi-sequential also runs 2 at once, im assuming it just allows you to change the phasing? Dunno. And brain, im running 550cc injectors.
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Old 04-18-2014, 12:02 PM   #5
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Yep, I get it now. Why not just re-wire, its really not difficult at all, and enjoy proper seq fuel?

I don't see how timing the injection will improve anything when you're still firing off in batch
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Old 04-18-2014, 12:39 PM   #6
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I guess I have no reason not to! I figured it was an arduous process. I will look into it.

On my wiring loom that rev provided, he details this:
Brown and Green (twisted together) (optional)- Ignition output C (brown) and
ignition output D (green)
Pink and Violet – Injection output C (pink) (optional) and injection output D
(violet) (90-93 only)

Does that mean that I run 2 of the injector wires to pink and violet? I disregard the brown and green? If its even on there, gotta pull up the mats and whatnot to check.
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Old 04-18-2014, 01:15 PM   #7
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there's no wiring required to run semi-seq. every 90-93 ms3x i've ever built runs semi-seq.

what 550 injectors? rx7 ones?
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Old 04-18-2014, 02:42 PM   #8
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Apologies, ive just finished my senior year semester finals and my brain is fried. They are rx7 injectors. I plan on getting some deatschwerks when I get the money but for now im running these. Whats the benefit of running semi over batch, and if I do run semi, what angle should I be squirting? I didnt see anything on the forum about it. Im thinking of just going fully sequential now anyway.
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