Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello my name is***** am an ASE Master Technician and I am glad to help you with your question.
This does sound like a vacuum leak, it you spray the intake and the rpm changes that indicates a vacuum leak. I would replace the intake gaskets and check all hoses for cracks. Positive long term fuel trims indicate a vacuum leak.
Another way to check for vacuum leaks is with a evap smoke machine. You fill the intake up with smoke and can see the leak.
You mass air flow reading seems high at 2k rpm. I would try removing the MAF and using some MAF cleaner to spray the electrode it may be dirty and causing your problem.
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