CAMARO6 - View Single Post - P050D

EMTNLSS · 03-28-2019, 06:51 PM

Yep I have this exact same issue. Codes P050D and P0300. I've logged it with hptuners and it's misfiring in cylinder 7 and 8 for me only during the cold start sequence. Like you said as soon as the rpms drop to around 700 I get no misfires. I can drive it around and hptuners shows no misfires. I bought some new injectors and will be replacing them as I believe that's the issue. During a cold start the injectors run in a special mode that pulses them twice or something like that and in hptuners I can watch them switch off that mode. As soon as that happens the misfires stop. So i'm hoping once I get the injectors replaced it'll be fixed. If not then maybe ported heads are in my future. Definitely looking forward to your update.

Also here's a link to that coolant leak service bulletin the dealer was talking about if you want to read into it more: https://gm.oemdtc.com/9941/ses-lamp-...-chevrolet-gmc

03-28-2019, 06:51 PM	#2
EMTNLSS Drives: 2016 Hyper Blue 2SS Join Date: Feb 2016 Location: Layton, UT Posts: 500	Yep I have this exact same issue. Codes P050D and P0300. I've logged it with hptuners and it's misfiring in cylinder 7 and 8 for me only during the cold start sequence. Like you said as soon as the rpms drop to around 700 I get no misfires. I can drive it around and hptuners shows no misfires. I bought some new injectors and will be replacing them as I believe that's the issue. During a cold start the injectors run in a special mode that pulses them twice or something like that and in hptuners I can watch them switch off that mode. As soon as that happens the misfires stop. So i'm hoping once I get the injectors replaced it'll be fixed. If not then maybe ported heads are in my future. Definitely looking forward to your update. Also here's a link to that coolant leak service bulletin the dealer was talking about if you want to read into it more: https://gm.oemdtc.com/9941/ses-lamp-...-chevrolet-gmc __________________ 2SS Hyper Blue Metallic \| A8 \| Jet Black Interior \| NPP Exhaust Current Mods: Catch Can \| aFe Lowering Springs \| GM 2nd Gen Splitter \| Hotchkis Sway Bars \| MRR FS02 Wheels \| Flowmaster Exhaust \| Dark Tail Lights \| Diode Dynamics Sidemarkers \| Roto Fab \| Solar TB \| PRAY Ported IM \| BMR \| PRAY Tune Upcoming Mods: Last edited by EMTNLSS; 03-28-2019 at 11:08 PM.