Are fuel injectors numbered the same as the pistons. 1357 on drivers, 2468 on passenger in that order?

I believe someone switched 2 and 4, is it possible that that was causing a missfire?

 

Yes, they are numbered by cylinder. Whether switching a couple would cause a noticeable miss...maybe.

 

It seems like that was the miss, i switched them and car runs a lot better now, i need to give it a few days to make sure. I cant believe i didnt notice it all this time and ive had my car almost a year. I definentally did not ever mess with the injectors before.

The timing has to be better now that its wired correctly.

The missfire is strange because it comes and goes at odd times. I think the pcm does adjusting to counter the switch and whenever it gets to acertain point, it fixes it.

 

the injector connectors on the wiring harness should have the injector number on it. I once installed them with 1 and 3 switched and it ran okay at low rpm's but caused knock at higher rpm's

 

that and make sure when they are pressed they were totally clicked in, i have an injector not totally clicked in and my car ran like crap