Car hesitates and misfires

2005 lexus es330 v6 200,000 miles

While reving car ,it hesitates around 1000 rpm( when I rev the car it shakes around 1000 rpm than goes up with no problem, car in park)

Also when car is at stop light idling it sometimes misfires. More notice when ac in on.

No check engine lights

Thanks people

I need some directions
I have an basic scan tool that reads live data.

Update car misfires while in idle with ac on. When I turn ac off . It runs fine but still hesitates around 1000 rpm

Does the car actually misfire? Or does the rpm at idle simply drops really low to where it makes the vehicle shake? I just want to clear that up since a vehicle that "bogs down" at idle is handled differently from a vehicle that actually does idle poorly due to an intermittent misfire.

It was intermittent misfiring. It finally trip a code. Po304. I suspect it's the coil. So swap coils from the cylinder next to it. But the code hasn't trip yet. Hope it trip soon. Thanks for replying. Anyways I order a new coil and sparks plugs already. But I really hope the code will appear again soon.

Ah, ok. That's a good start. I've seen a couple of cars play games like that with coils and spark plugs that are on their way out.

I still felt The misfiring after coil swap .The check engine light wasn't tigger. So I just replace that one coil , now running normal. Thanks for the help. Wish my scan tool had misfire monitor/counter