[MilehighM3]

Originally Posted by 335_E90

We pulled the plug on cyl 4 and it looked normal. I told the mechanic i was reading online how index 12 cant be mixed with index 8 or 9 and he said it doesnt matter. I think that that's the problem though.

Trust me, they can't be mixed. There's service information on it that been out quite a long time.

[mojobmw_e90]

If u are low on money, buy 1 injector used index 10 and lower and see if it helps. Shit il sell u one of my good index 1 Injectors so u to try out

[tofu?]

Originally Posted by MilehighM3

Trust me, they can't be mixed. There's service information on it that been out quite a long time.

i haven't searched recently, but i don't recall anyone ever having a problem mixing. in fact, the only posts I've seen from people who have actually tried it say that it works perfectly fine.

[335_E90]

I would like to thank everyone that took the time to answer and try to trouble shoot.....my garage did a compression test today and compression is good! 175 on cylinders 1-5 and cyl 6 was 170. I was telling him i was reading up on injectors and garages not installing them properly with clips etc and it would cause a misfire. So long story short he pulled cyl 4 injector which i had changed about 3 months ago and what do you know, the little clip wasn't there! I had my old injector in the car we took the clip off and put it on the the other injector and reinstalled it and bam everything is perfect now and i can finally boost without misfires! Thanks again to everyone for your help!