I assume your car is a manual now?
Mine does the same thing. (Manual 1uz).
(my other car) factory 1uz/automatic does it as well, but being an automatic it's not as noticeable.
Hi all,
I have for sale a 1UZ VVTi valve regrind set. Bought from eBay US, similar to this (http://cgi.ebay.com/ebaymotors/98-00-4-0L-Lexus-GS400-LS400-SC400-V8-Head-Gasket-Set-_W0QQcmdZViewItemQQhashZitem45ec108be5QQitemZ300313250789QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories)...