I just bought a 2002 lexus sc430, it’s been my dream car when I was a kid. Currently at 250k km. Recently after a long 3H drive I noticed when I put it in drive the rpm throttled between 1100-600rpm. And when I put my foot on gas it paused for a sec then shifted gears and accelerated.

Couldn’t find any forms regarding this topic so I thought I’d post. No check engine light or anything. Checked transmission fluid looks good. All other fluids look good. Anybody had this issue before? Or is it just a common thing I shouldn’t be worried about?

 

There is a simple procedure to reset the ECU. It is quick and easy and there are no cons to it.

1. Get in your car and insert key. (It doesn't matter if you close the door or not.)
2. Turn the key to the on (not start) position.
3. Press the gas pedal to the floor.
4. Hold the pedal to the floor for five seconds, then turn the key back to the "off" position
(don't remove the key), then release the gas pedal.
5. Wait 2 minutes.
6. Remove key.

That should do it.

 

That's a "normal" thing on the SC430. Just follow GmanSC instruction to reset the ECU and you are good for another 1000s miles or so.