JeNeViEvE

18 hours ago, RX400h said:

Have you seen this list of possible causes of engine hesitation/Random Cylinder Misfire Condition
 

P0300 LEXUS code possible causes
Faulty spark plug (s).....x
Faulty ignition coil (s).....x
Clogged or faulty fuel injector (s)
Intake air leak
Fuel injectors harness is open or shorted
Fuel Injectors circuit
poor electrical connection
Ignition coils harness is open or shorted
Ignition coils circuit poor electrical connection
Insufficient cylinders compression
Incorrect fuel pressure

 

No. Thank you very much! So we did do the fuel pump in the gas tank under the seat. Is there another in the engine compartment? We don't see one. If there is in the 2002, can you tell us exactly how to find it, because after doing the fuel pump in the gas tank, it's still hesitating. We will also check out your list. I appreciate all of your help.

9 hours ago, RX400h said:

Are you referring to a tank filter or one that's in the engine bay? 
LEXUS ES300 / TOYOTA FUEL FILTER REPLACEMENT - Bing video

We can't find the one that's supposed to be in the engine bay under the air cleaner?? I think they might have stopped that one right before the 2002 model. We are just trying to find what's still throwing misfire codes and making it hesitate.

We replaced all spark plugs and ignition coils. Still throwing misfire codes and hesitating/cutting out. Checked all SP and IC's and they are functioning correctly. Next step, fuel filter. How do we get to it? Tried removing back seat, it's glued in. Please help.

Anyone have a video showing how to do this? Our seat is glued and just doesn't want to come out! So is it for SURE that a 02 Lexus es300 has the fuel filter in gas tank, accessible by removing the rear seat? We replaced all of the spark plugs and ignition coils yet she is still cutting out and throwing misfires. We rechecked that all ignition coils are working properly, so fuel filter is next step.