Lexus SC Jerking Acceleration

Hey, I'm having some serious issues with my 2000 Lexus SC with a gasoline engine. The check engine light is on, and the car is jerking badly when I accelerate. I've also noticed a whistling and loud hissing noise when accelerating, and sometimes the engine even stalls when idling. Fuel consumption has gone up, and it feels like I've lost a lot of power. I'm suspecting it might be a bad boost pressure sensor, maybe a defective cable or plug connection. Has anyone experienced anything similar?

4 comment(s)

Sounds rough. I had a similar problem with my Lexus SC. Is it worse when the engine is cold? Could be the pressure sensor or somewhere in the turbo system. Check all the air intake hoses for cracks and loose connections. That whistling noise is a classic symptom.

Thanks for the quick reply! Yes, it does seem a bit worse when the engine is cold. Where exactly should I be looking for the pressure sensor? And how would I check the connections properly? I'm not that experienced with car repairs.

Honestly, if it's that bad and you're not super confident, I'd suggest taking it to a workshop. Pressure sensor issues can mess with your turbo and you don't want to make things worse. Could be a quick fix, but best to get it checked out by a pro.

Thanks a lot for the advice! I took it to the workshop and you were spot on. It was indeed the boost pressure sensor and a defective cable connection. They replaced the sensor, fixed the connection, and now it's running like new again. Cost me 95€ but well worth it. Appreciate the help!

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