Hi Everyone,
I bought the Envoy with a spun rod bearing. I rebuilt the motor and did the DOD delete and added the Truck Norris cam. The Envoy doesn't have VVT. I have sprayed carb cleaner everywhere and do not believe I have a vacuum leak. I did a compression check on the 2 worst cylinders and they were both 120 lbs. I also added 2 grounds from the block to frame and firewall to cylinder head. It runs good above 1500 RPMs. I just added a wideband but it is only showing a voltage currently...I still have to sort that out. I am hoping this is a tune issue but I am not sure.
I have searched for P0300 but didn't find anything relavant. I am sorry if I missed the solution. I will attach the tune file and a scan file while idling.
Thank you in advance for the help!MIssfire log 032923.hpl2006 GMC Envoy 030423 final before WBo2 base idle airflow increased 1.15.hpt