MS3x powered LM7 loosing power at 3000rpm

[silv8]

First time poster here looking for some advice about my first Megasquirt powered engine swap.

After about a week of driving my 91 240sx with a 5.3L LM7 from a 2005 chevy 1500 and t56 trans, ive noticed i can very rarely get past 3000 rpm without really bad misfires and complete loss of power. Everything below said rpm seems to be fine; somewhat smooth powerband, no more backfiring, decent AFRs, very little bogging. Once i hit ~3000 rpm it starts to misfire, the vacuum goes way up (90kpa to 65kpa) and my AFRs go way lean. Im guessing the fuel is not igniting in the cylinder for some reason and unburnt oxygen is reaching my wideband.

Im running:
Completely stock engine with the exception of C5 corvette headers
Tuner studio Ultra v3.0.28 MS3 1.5.1
Sequential fuel and spark
Stock GM sensors in stock locations
GM MAP in manifold with barometric correction from onboard map in MS
corvette fuel filter / regulator with walbro 255 fuel pump
AEM (30-4110) wideband about 3ft from header

ill post my MSQ and Log o the problems. Any ideas are greatly appreciated

[billr]

The VE table looks a bit lean, try increasing those values a bit. Yeah, ignore what the WB is telling you and see what the engine likes.

[Tjohnson]

for whatever reason, the spark advance doesn't match your timing table.

timing table goes to 36 when the spark advance in mlv shows only 19.7 degrees.

i looked through every pull down in turnerstudio, the only thing i found that might be it is under Can/Bus test modes, in special options, it shows minimum "spark adjust" as 15 which is about the amount its off in the logs. try it. its the only thing i can see that would be making a diference.