Hi, I am preparing my car for a turbo, and I finally got my tune decent enough to move up a notch, fuel injectors. I installed them yesterday, and got my car running, but not incredibly. I switched my engine constants, and my injector characteristics, but I am having an intermittent miss at idle. I replaced my spark plugs just in case it was the issue, but it didn't work all the way. I am probably going to put new wires on tomorrow. Anything I should look at in the tune?
If I am breaking any rules, I'm sorry, it's my first post.

 

How old are the injectors? Are you sure they're not Chinese knockoffs? Were they cleaned and flow tested prior to installation? Personally I would have used flow force 640s. They have a better spray pattern and idle perfect.

 

I dont understand why people continue to flock to RX8 injectors and sometimes even RX7s in the 2020s. There's way better tech and spray patterns available with all the data handed to you for (imo) a pretty fair price to fit any fuel needs.

 

they are oe injectors, rebuilt and tested.

 

Tested as in you have a sheet of paper with the individual flow rates for each injector or as in they were purchased used and some seller told you so?

If the former, did you put the one that flows most on number four cylinder? Because I would.

If the latter, good luck to you.

Have you done a compression check recently? Low cylinder pressure is often worse at low RPMs because it has more time to bleed off pressure.

 

don't have a test sheet. I hope it's not low compression, its an 83k mile engine. It feels good, except for idle, its off.

 

RX8 Yellow injectors?
They don't like to play at low pulsewidths on my speeduino.
On my NA6 I need to idle at about 12.5:1 to have any kind of idle quality. Otherwise it misfires like you've said.