on an s4 turbo do the primary injectors pulse at the same time. also do the secondaries pulse at the same time. if the primaries were to get switched from left to right would it matter. and the same thing with the secondaries

 

No. Primarys don't inject/pulse at the same time.

 

switching them around doesnt matter (assuming they are stock injectors)

 

Kinda got a point there. I understand the secondarys batch fire. I done did read that somewhere.

EDIT: I need to think about that a bit. Something isn't quite right........in my mind, about that.

 

i didnt think they mattered but i know that switching a primary injector wire with a secondary will not work. i ask this because i just had my engine finished and im trying to eliminate wiring mix ups before i go to start it. so im getting that it doesnt matter from left to right?

 

the injectors dont matter, the wires do.

 

Just look at the front and rear primary injector wires. Color coded. Front primary has a light green wire on it's plug. The Rear primary has a light green/black wire on it's plug.

Both lead sparkplugs fire at the same time. The injectors shouldn't inject at the same time, unless I missed something. That said, out of curiosity I went to the ECU and swapped the light green with the light green/Black. Started and idled fine and I drove it around the blocks and it seemed normal. I admit to being confused about why it ran normal. Got me.

That said, why not install them per the manual. No good reason to not do so.

 

https://www.rx7club.com/showthread.p...ighlight=BATCH

On that thread, NZCONVERTIBLE seems to know how things work. HOW he knows is a good question. Maybe HENRIK knows for sure.

On my little wire swap test, I should have looked at the afr with the wires per factory and with them swapped b/t primarys. That should have told me if things were different one way vs the other.

I did a search and your initial question has been asked before in this thread: https://www.rx7club.com/showthread.p...ighlight=BATCH

TED and NZ both say primarys fire sequentially until 3800 rpms, then batch fire.