Isx surging or rough idle

[smorgan87]

Without having insite hooked up It sounds like you have an injector bad causing an entire bank to get thrown off. Make sure your tanks and fuel filters are clean, no leaks in fuel lines, No bubbles in davco. Then id warm up the engine, drain the davco and refill with sea foam, restart run for about a minute kill it and let sit for an hr or so. If you have insite check codes and run a cutout test after u get done cleaning. Try running one bank at a time and try running on each cylinder by itself.