The problem happens when the engine is warm or at least it is more apparent. Past 2000rpm the surges seem to disappear. It feels as though I am gently pumping the accelerator pedal. It may be more of power loss than a surge, it is difficult to tell.
Why does my Lexus have power surges between 1000 and 2000 rpm? on 1998 Lexus ES300
by Denny C in Bemidji, MN on September 19, 2012
2 answers 5 comments
ANSWER by globalhelper on September 19, 2012
do you have a service eng soon light on?
could be the begining of a misfire that happens only under load. i think i would start by ck'ing for misfires
If I start to accelorate or back off on the acelorator between 1000 and 2000rpm the surges seem to stop. It is only at a steady cruise that the surges happen. Would that be consistant with the beginning of a misfire?
yes very possible
I will pursue that fix. Thank you.
ANSWER by holston2008 on September 20, 2012
i would check the throttle positon switch