Changed injectors car won't start. 30ba and bb codes - N54Tech.com

Rhydell3 · **Changed injectors car won't start. 30ba and bb codes -** 10-30-2020, 12:46 PM

So the car ran fine other then cylinder 4. It was dead. So I went ahead and replaced all 6 injectors and coded them.they were all the same code. The car will not start at all now. Won't even act like it wants to just turns over. The 30bb and 30ba codes are what it's showing me but it does allow me to delete them. They won't show back up unless I let the car turn over for about 5-10 seconds. As far as I can tell everything is back together right and all. I'm just not sure what's going on. Any help is appreciated.

dmckmc · 10-30-2020, 05:23 PM

fuel flow? spark? fuses? - be sure to check the fuses in the dme box. also, your injectors are likely knock off or refurb as all code numbers should be unique

Rhydell3 · 10-30-2020, 06:00 PM

The car ran before I swapped them. Other then cylinder 4. If I unplug 2 and 6 it will fire but won't run. And I thought it was weird they were all the same. They are refurbished though. Bought them online, like 550$ or something. They are oem index 12s though. I havnt checks the fuses or anything. Which ones should I check in particular. I'm not familiar with bmws, at least not ones this new. I don't mind replacing the mosfets if I have to but I want to make sure that's what it is before doing so. The car had a code for 4,5,6 which is a 30ba a I think or bb I cant remember, before I changed the injectors. The coils and plugs are good. I tired switching them around for number 4 trying to get diagnose the issue. The number 4 injector wasn't firing at all. It wasn't coming on.

brendan · 10-30-2020, 10:18 PM

Injectors will not have the same code. Cheap knock off companies are selling fake index 12 injectors with the same code printed on them.

Rhydell3 · 10-31-2020, 09:43 AM

Well I'm sending them back. Could they have cause my dme to mess up?

Rhydell3 · 10-31-2020, 01:24 PM

Alright I pulled out those injectors put my old back in. Car fired right now. Still running rough, real rough. The only code it's giving me now is oxygen sensor heater 2 before catalytic converter. That's the only code it's giving me. Surly that wouldn't make it run so rough would it?

Rhydell3 · 10-31-2020, 03:50 PM

Alright it started giving me other codes here and there. I have pretty much everything worked out now. Car runs fine, idles a little off but just a little. It's still giving me the code for the o2 heater. And now that I'm able to drive the car its giving me a low boost pressure code 30ff. So any ideals on tracking that down?