Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello and welcome to Just Answer, my name is***** start by asking some questions so I can better understand the problem?
By feeling a miss you mean the engine shakes?
Was the seafoam put in the gas tank, or vacuumed into the intake?
Have you tried running it with both O2 sensors unplugged?
OK aftermarket 02 sensors in a Toyota/Lexus is not a good thing, they can and will cause excessive fuel dump causing a misfire. I would recommend disconnecting them and see if it runs better. When there disconnected the car should run at default sensor voltage values. If they are not Denso brand I would replace then regardless.
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