LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

LS 430 2005 jerk when you slow down at light?

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Old 08-11-21, 01:33 PM
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340massive
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Default LS 430 2005 jerk when you slow down at light?

Need help I have an LS 430 2005 185000 miles am having issues when I slow down to stop there is jerk sounding like transmission not if it's an Ecm issue help?
Old 08-11-21, 10:20 PM
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911LE
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Sounds like the typical '04+ ecm problem. I've been seeing numerous posts about this issue lately on other forms as well. SIA electronics can fix it.
Old 08-12-21, 08:29 AM
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caverman
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https://www.ebay.com/itm/223971437477

Mine is being shipped back today.
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Old 06-22-24, 06:51 AM
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jazzitup
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Originally Posted by 911LE
Sounds like the typical '04+ ecm problem. I've been seeing numerous posts about this issue lately on other forms as well. SIA electronics can fix it.

Hello. I'm having the same issue with my LS430 jerks when downshifting has anyone used SIA electronics? when getting the ECU back from SIA is it just plug it back in and that's it?

Last edited by jazzitup; 06-22-24 at 07:09 AM.
Old 06-24-24, 04:10 AM
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biacs
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I get sort of a lurch/tire chirp if I have to stop suddenly and tap the gas to move ahead. IT sort of loads up and chirps the tires just a bit.

Both my 430's had this. Its like in a parking lot if you stop sudden and then take your turn.

DOES THIS ADDRESS IT? lol - I always thought trans fluid was surging forward.
Old 06-24-24, 10:02 AM
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Riz1
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so when you get the ecu fix, does this affect mpg?
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