1994 Lexus LS 400 - Page 3 - Answered Questions & Fixed issues

check for a blown fuse in the fuse panel and if its not that pull the gauge cluster out of the dash and check the power and ground going to it cause most of the time its a bad ground wire or power wire cause people tend to kick wires under the dash on accident or they get worn or come apart

Could be a ball joint bad tire, really hard to point out to one issue. Garage would be able to tell you

You'll need someone to check the computer to read the O2 sensors and exhaust output.Could be a long list of problems such as spark plugs, excessive carbon in the engine, and so on.

HelloYou need to pop up the wood surround up. Be careful. You have to pry up the back side (near the cup holder and slide it back. There's two pieces of plastic that the wood slides into in the front and if you don't slide it out you'll break those (I learned that the hard way). The piece will still fit fine though even if they are broken and it won't be loose. Anyway. after that is out there the plastic piece that the ect switch is in. Pop that up, there are clips again, no slides. I believe you have to remove the switch from the plastic. No big deal just pry it out easily. Remove the plastic screw and there's your light bulb. I found my replacements at radioshack. They're not exactly the same size but they work just as well. To get at the gearshift light, just reach under the left side, find the two wires going into that area, grab the plug, twist and pull out. Don't try prying the top panel off (the one with the Letters and Numbers) it will break. That bulb is a tiny wedge bulb. Just pull it straight out and do everything in reverse to put stuff back together

some sunroof,s work just like a power antenna they have plastic rods with a worm gear my best solution is to have a look at the worm gear for ware and replace if nesesary

Sounds like timing belt.

The sending unit located in the gas tank must be replaced on most of these cars you can gain access to it by removing the back seat revealing an access cover allowing you to get to the sending unit remove retaining screws or locking ring and replace. You probably should be grounded and have a Haynse repair manual handy to walk you through this job it's not the easiest job but not to hard either unless the gas tank must be dropped down to access the sending unit if that's the case have a shop do the job that job is pretty tough.

For acceleration problem,the help links are provided below,click the link below to go through its procedure :----Engine accelerates when brake is applied? http://technoanswers.blogspot.in/2012/02/engine-accelerates-when-brake-is.html ----------Loss of acceleration? http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html----------How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

-------How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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stalls and bucks on Acceleration? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Acceleration lag problem? http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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Car loses power while acceleration? http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html

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This will help.

Thanks.

Thanks for choosing FixYa and welcome. Something is draining the battery, eventually killing it. Have you had starting problems in the past? Is the car cranking? Have you checked anything, such as alternator, terminals?

Hi Patricia, Take the vehicle for a diagnostic scan. The problem may be with the mapping sensor or ignition system, which may include the crankshaft sensor or the cam sensor. I doubt that the problem will be with actual fuel system because it misbehaves at a specific engine speed. By taking it for a scan the technicians will be able to pin point the problem for you. Regards John

Might be the rheostat which regulates/dims the dash light... If you need further help, I’m available over the phone at https://www.6ya.com/expert/robert_573a00ba7e399076

problem could be stopped up fuel filter if car dies when you drive car has a lean fuel system need more gas on acceleration which is a rich fuel mixture.

The starter of your car is located and hidden under the top part of the engine, in the very center. They locating the starter inside the engine. You may also need intake.Hope this helpful.Best regards.

if it is for the power steering system or the hydraulic cooling fan then you only need power steering fluid.

Check first if the fuel filter needs replacing. This may be an issue with the Idle Air Control Valve. But first check the vacuum hoses for leaks or loose connections. Your timing may also be wrong. If this was not checked a long time it is good to have this checked. Other than that you may need to have to spray carb cleaner into the intake manifold of the engine and the Idle Air control valve. If this does not solve it the IAC may need replacing.
If you can also have a scanner connected to the engine to see if there are error codes. Some error codes amy be stored in the computer box even if the check engine light is not on. It is a good idea to do this. Some shops would let you borrow their scanners.

The fuel pump is inside gas tank behind the back seat unscrew the only top that's there and it is inside the gas tank. You will have to remove your back seat to gain access to fuel pump. Fuel tank is located in trunk. No need to take fuel tank down. Click this link for full details and procedures:--- http://technoanswers.blogspot.com/2011/06/how-to-replace-fuel-pump-on-lexus-ls.html ----------- For fuel filter replacing, click this link:--- http://technoanswers.blogspot.com/2011/06/how-to-replace-fuel-filter-1994-lexus.html ----------- For timing belt and water pump removal and installation, click this link below:-- http://technoanswers.blogspot.com/2011/06/how-to-change-timing-belt-and-water.html ------------ For coolant flushing and filling, click the link below:-- http://technoanswers.blogspot.com/2011/06/how-to-drain-and-fill-coolant-on-lexus.html -------------- This all procedures should help.Thanks.Helpmech.

Hello first of all

Can you elaborate on what you asking the ecu is simply plug in play if you will just unplug the old one and plug in the new . Or am i missing what your asking for please elaborate thanks.

first thing to check is your anti-freeze level ...if that is good put a thermo-gun to your thermastat housing and see if the themastat is opening at the proper temp ...may just be stuck closed cheap fix

that is very possible if the starter is drawing to many amps it will kill a battery in a short time
watch your volt meter ill bet it jumps to 14volts after starting


hope this helps you
bob

if you havn't hit the dimmer switch on your panel, then you might have a blown fuse