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Lexus LS 400/LS 430



  • wwestwwest Posts: 10,706
    Well, that didn't work, the pressure is pushing the fluid past the "blockage" and still flowing into the intake manifold. I think I'll replace the idle-up valve with a simple pipe plug next.
  • rennyboschrennybosch Posts: 329
    So Willard, let us know what happened. Also, are you actually disabling the power steering altogether? And another thing -- isn't your 92 LS400 worth $80 just to keep it happy?

  • wwestwwest Posts: 10,706
    I removed the PS pressure sensor and soldered the nipple, fluid pressure sensor end, SHUT.

    This sensor only operates when the PS fluid pressure is quite high, say turning the wheels agains a curb or against the end stops. Rarely need the help. Power stearing operates normally otherwise, just no "idle up" in the above conditions to provide more flow/pressure.
  • I've searched the threads and it doesn't seem that the struts on the base suspension have caused many problems. I recently purchased an '04 with 50,000 miles (now 55,000) and I've noticed that as the suspension rebounds, the rear struts seem to have no damping. While the car was on a lift, I did look at the struts and so no evidence of leakage. The front struts seem to be fine. I am going to have the rear shock inserts replaced. My question is this. Under normal circumstances, how long should these struts last? I've seen other posts claiming over 125,000 miles. As you know, this isn't going to be an inexpensive fix, so I'm wondering if it will be okay to leave the front struts alone?
  • I am planning on buying a used LS and am concerned about gasoline octane and the fact that I have heard that one must use premium only and further that the car will not run properly without the more expensive gasoline. I am driving a Toyota Avalon and that, too, reguires premium but runs just fine with mid grade. Anybody out there to help me?
  • houdini1houdini1 Kansas City areaPosts: 5,780
    My 2006 LS runs just fine on regular grade. The only difference I notice is that in mainly urban driving I get around 20 mpg on regular and 22 mpg on premium. Can't really tell any other difference. I usually use prem. just for peace of mind and the better mpg. Good luck. Great cars.

    One of my nicest surprises was 30 mpg on highway trips ! Not bad for a nice V-8.

    2013 LX 570 2010 LS 460

  • There's no reason your car won't run "properly". It might be a bit slower and you might get less mpg, but it should run fine because the car's engine management system will compensate for the lower octane.
  • I have an 05 that I routinely use midgrade fuel in with no problems or perceived degradation in fuel mileage. No apparent performance issues either, but I don't push the car. Hope this helps.
  • patpat Posts: 10,421
    I'm sorry, but posts advertising anything for sale have to be removed.
  • I am removing parts from my 95 for my 97. Which parts should I deinetly remove and keep
  • Your first task is figuring out what will interchange. '97 had engine and styling changes for one thing.

    I'd certainly keep anything that is small and breakable, like lenses (if they fit), turn signal switch, power window switches, glove box/console locks, relays from the relay box. If the alternator had the same part #, I'd grab that, too. If the stereos interchange, take that out, too.
  • I just bought a used 2004 LS430 recently. There is a black I/O button by the side of ECT POWER/SNOW button. I can not figure out what the button is about. I asked the previous owner and he did not know it either. He said it has no use as far as he can see. My question is : If the button is there , it should have some kind of use.
  • Oh I think that eliminates 1st gear if I recall correctly, and also de-sensitizes the throttle, so that you don't apply too much power to the ground in slippery conditions.

    It resets every time you turn off the car, so you have to keep pressing it for it to work.
  • Thanks for your reply. I will check that out. But I just want to make it clear : it is a rock switch kind of button like the power switch at back of the PC. It is not push on, push off kind of button.
  • vchengvcheng Posts: 1,286
    ... the Owner's Manual would a be a good place to start.
  • I don't have the owner's manual for your particular car. Possibly there is a sport suspension switch that activates the Power/Snow function to give you either/or. In that case, "power" would extend your shift points and "snow" would drop first gear and de-sensitive your throttle.
  • Sorry, the owner's manual is missing. The previous owner told me that he did not have the manual when he got the car. He figure out everything himself.
  • vchengvcheng Posts: 1,286
    ... register as an owner at the Lexus website, I think you might be entitled to a free copy of the owner's manual for your car. Otherwise, I am sure eBay will turn something up. It may be a wise thing to do anyways. :)
  • For what it's worth, the '04 LS430 Ultra-Lux has a row of three toggle switches, labeled (left to right): SPORT-NORM, HIGH-HEIGHT-NORM, and PWR-ECT-SNOW. If your LS doesn't have all those options, maybe Lexus just left a dummy switch there to fill the hole. I/O certainly is not a very informative label.
  • marsha7marsha7 Posts: 3,661
    I/O simply stand for...In/Out???

    Some people won't stop at anything...maybe I'm one of them... :P ;)
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