Where to start: P0300

[patooyee]

Sigh ... I hate posting a noob question like this but alas, I am a noob so I will just let er rip.

2005 SSR LS2 engine that has 23,000 miles on it when pulled. It's in a buggy that has just been completed. The only modifications to the engine are modified fuel rails for flow-through, headers, and custom intake plumbing. The exhaust is open though, no muffler. The only things I have done to the tune is disabled VATS, the DTC's that I don't need, and played with the fan on-off temps. (Tune attached.)

I have a small random misfire that is tripping a P0300 code. When watching my gauges in scanner LTFT Bank 2 is high at idle. (18%) I can hear the minor misfire when it happens but the engine runs great otherwise.

I want to view misfire data in the scanner and I see where to add each individual cylinder to the table but then how do I view the data real-time to see which cylinders are missing?

I figured the LTFT-B2 being high probably meant a vacuum leak at either the intake or injectors but after coating them all with brake cleaner the idle is not affected at all. I know seeing individual cylinder misfire data is the most important thing at this point but can't figure out how to get VCM Scanner to show it to me.

J. J.

[patooyee]

I think I may have just figured it out ... I added current and historical misfire PIDs to the table and then also the chart. I then saved the config file as my misfire diagnosis file so that I can open it any time I need to diagnose misfires. Does this sound right?

Also, it appears that I can only have 20 PIDS displayed on the chart at a time?

J. J.