Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello, is the check engine light on and if so have you had the codes pulled?
Thanks, ***** ***** to look at are
1. Fuel pressure
2. Restricted exhaust (catalytic converter can clog)
If you could give me the year, model and engine size I'll pull the fuel pressure specs for you.
The acting liek it doesn't want to shift and sputtering under load but reving fine does sound more like an exhaust restriction. You can either drop the down pipe some or remove the oxygen sensors to see if that's the issue.
I'll post below on how to chck the fuel pressure and regulator, as a bad pressure regulator can cause this as well