Hi. I've installed a Terminator X Max on my LS1/4L60E Buick Century. It idles fine, slow ramp ups are good, but revving causes the engine to bog & sometimes dies. If it dies it won't start up again. AFR is at 14.5 idle & 14.7 high RPM (set it to 14.7 to try a leaner mix). New fuel pump, regulator, coil packs, spark plugs, wires & TPS. It had a similar problem on stock ECU, but only in Drive. After installing the harness & ECU it happens even in park.