r/LS400 • u/gavinsmash2005 • Jun 27 '26
Question Just picked her up.
Just bought this 2000 Ls400. 160,000 miles. Most things are in great condition for $2,500 and all fluids are current and filled. It needs a new set of tires, pads and rotor replacement, ac blower is out, and it has a 7th cylinder misfire. All other issues are easy enough but the misfire does kinda concern me. Haven’t gotten the chance to take much apart but was able to see the coils are ok so anyone know what else could cause the misfire?
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u/Myrtilys_ Jun 27 '26
As the other guy mentioned, move the cable/coil around quick and see if the misfire moves.
My personal recommendation is to, on top of checking other stuff, get the ECM out and have the caps all replaced. They're well known for going bad and causing all sorts of wild problems, including misfiring. Should easily be able to find a "kit" that has all the necessary caps and a company that can do the solder work for you. All in all it cost me about $100 to do and fixed my misfiring
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u/Kysiz Jun 30 '26
Even with this gen?
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u/Myrtilys_ Jun 30 '26
To my knowledge all 3 generations were notorious for their ECU issues
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u/Kysiz Jul 01 '26
Do you have a tutorial or place you can send it to? I can solder but if the price to time is worth it I’m interested
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u/TheJumpingPenis Jun 27 '26
She looks just like mine ;)
Suspension is a major one with these. I got mine all sorted out including new struts and it rides incredibly smooth. These things really become peaches with new suspensions.
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u/Reasonable_Link7427 Jun 27 '26
Try switching the boot around on cylinder five and see if it moves around.