MSefi.com read only forum (Jan.15,2018)

Im running megasquirt II version 3 on a 260z. code 2.89 Car starts fine and runs with a little misfire. when it misfires wideband goes super lean (21.9) car idles and has pretty good power doesn't hesitate or die. when checking with timing light i saw light miss a beat and also just around. im using the stock vr sensor in the distributor to trigger coil. negative cool wire and vr signal wire both shielded. LC-1 wide band, turbo injectors,

Please post a data log of the misfire, along with your MSQ. That may shed more light on what's causing it.