Hey everyone,

I'm seeking advice regarding my 2006 Chevy Silverado 1500, which has given me some idle issues recently. It's throwing the P0300 code (random/multiple cylinder misfire detected), and despite some adjustments, the problem persists. Here are some details:

• I've raised the idle by 200 RPM, hoping to stabilize it, but the issue remains.
• The truck has LS7 lifters and a stage 2 sloppy cam installed, otherwise, it's stock.
• The idle fluctuates erratically, sometimes running fine, but other times, the RPM jumps up and down between 500 and 1000 RPM.

I've checked for vacuum leaks and ensured the throttle body is clean, but I haven't found anything conclusive


Any guidance or similar experiences would be greatly appreciated. Thanks in advance for your help!

 

did you ever figure it out ? Also do your lights flicker ? Mine stalls randomly, but past 1500 RPMs it’s normal