'05 Aveo Losing Power, Bucking, and Intermittent Stalling. No codes, hard to diagnose

[slayerized6]

When was the last time you replaced the plugs and wires. Also sounds like it could be a bad coilpack.

[zucifer]

When was the last time you replaced the plugs and wires. Also sounds like it could be a bad coilpack.

About a year and a half, maybe two years ago max. Had oil in the plug wells so I replaced the valve cover gasket, plugs and wires. I tried misting the coil pack/wires at night and didn't see any fireworks, not sure if a coil pack would go bad and not show sparks?

[zucifer]

Welp.. replaced the throttle position sensor and it's still been stalling out, losing power, and dropping RPM. I got a fuel pressure gauge on it and have been driving around with it and recorded the following video:



This is just slowing down from foot on the gas to a stop. Looks like it's fluctuating about 10 PSI. I haven't had it stall out/lose power on me yet when I've had it hooked up to the pressure tester, but will update if I can get it to happen.

Does anyone have any idea if this is an acceptable PSI fluctuation, or does this alone point to the fuel pump/system as the culprit?