lexuses Posted December 9, 2003 Share Posted December 9, 2003 Folks, I've got a '93 ES300 that bumps up and down about 200 RPM at idle when in gear. If I put it in park it seems to settle to a normal idle range. Any idea what might be causing this? It runs great at higher speeds and I don't notice any hesitation, however the idle thing is really annoying. Also, I remember seeing a post recently about a rattle noise in the front end at low speed. Can someone provide me some info on this or point me to the post? Thanks in advance. Quote Link to comment Share on other sites More sharing options...
dropspace Posted December 9, 2003 Share Posted December 9, 2003 can you tell where the rattle is coming from? i had an annoying rattle that i could hear only at low speeds and it turned out to be the wheel caps being loose. I just bent the metal brackets on the back of the caps out and pounded them back on tight.... Quote Link to comment Share on other sites More sharing options...
SW03ES Posted December 9, 2003 Share Posted December 9, 2003 That may be a normal characteristic of the V6, mine doesn't idle steady all of the time when in gear, and its brand new. Quote Link to comment Share on other sites More sharing options...
squarehat Posted December 9, 2003 Share Posted December 9, 2003 Two things: one, this is especially noticeable in Lexus V6's when cold. Second, is your climate control in "Auto" mode? The fluctuation in RPM could be simply the result of the A/C compressor engaging/disengaging as it deems necessary. Quote Link to comment Share on other sites More sharing options...
Latoilette Posted December 10, 2003 Share Posted December 10, 2003 can it also be faulty PTU connections or maybe IAA unit? Quote Link to comment Share on other sites More sharing options...
lexuses Posted December 10, 2003 Author Share Posted December 10, 2003 dropspace, the rattle is coming from the front end. it could be the caps. i'll take a look at them based on your suggestion. sw03es/squarehat, it used to idle fine, cold or hot. the ac does not have to be on for this to happen. latoilette, can you elaborate on the ptu and iaa? i am not familiar with those. thanks for all the replies. Quote Link to comment Share on other sites More sharing options...
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