OK I bought a 99 gxe with 83k on it. Had a missfire from day one. Have done the search thing to the point that I think I am blind and x-eyed.
1st. all rear coils had a bolt snapped off. Replaced rear value cover. Cleaned egr tb iacv, replaced and cleaned used maf from know good runnig car and new ngk plugs.
2nd replaced cly#3 coil pack. runs a touch better but still codes missfire on 3.
3ed Went a got a good code reader (have wanted my own for years) bank 2 2nd o2 code coming and going. lean bank 2 code once (at dam at near red line)
4th all injectors ohm at 12.7 all are clicking at idle
5th with a live data read I get a ol-drive read on bank 1 and 2 of the fuel system also will get a fault on both also.
6th Idle is all over the place but not jumping or lobeing. come to a stop it will hold the idle it seems to pick- 500rpm 1500rpm 2000rpm. it seems to like though 3 but any where in that range. but steady as can be (sometimes with a miss sometimes not) what ever it picks.
I am going nut's over this one. I am sure someone will say just buy 6 new coil and injectors from the dealer. that would end up being close to what I payed for the dam car and is not going to happen
Thanks for any help Dave
O any other info that would help just ask and Ill get it for you

 

Ok I know i have done the basic stuff, But where do i go from here? Any help would be nice. Thanks Dave

 

definitely try to swap injector 3 with another and swap ignition coil #3 with another one. see if the code changes. if nothing changes run a compression check. thats about all you can do unless you start buying a bunch of parts.

 

That was my next step. I hate the tough of pulling off the UIM again to just swap injectors around, but I rather do that then just though money and parts at it. I know that's the fast fix but why change out whats not bad.
I know there is still has good stuff under the hood. Hell it run's like a SOB above 3500rpms and not trying that had I hit 110 in the dam thing.

 

coils, plugs, or injectors. if that not it then its harness or ECU. U gotta look at those injectors to see how they spraying. throw some chevron techron in the tank.

 

fixed, 2 of the coils that tested good where bad