1994 Lexus LS 400 - Page 2 - Answered Questions & Fixed issues

sounds like transmission needs rebuilding. drive drum clutches worn. suggest master rebuild kit and new torque convertor

Well the most common causes are leaking injectors, fuel pressure regulator, or the check valve in the fuel pump. You could block off the return line to eliminate the valve in the pump.

Some models do, some don't. If yours has one, it would be visible with the door open.

had that problem.there is a wire harness on the trunk hinge.drivers side.it was a broken wire.common lexus problem

-Check spark & fuel.mai

if battery is old no hold,alternator is not charging battery is death.

What has been tested so far & how?

thermostat might need replacing,or heater core

The timing belt? At 100000 km.

replace rubber seal around top

Bad battery. if fully charged should read 12.6 volts. bad connections to battery, faulty or dirty contacts in solonoid, starter motor running dry and needing a clean out and oiling

I have the same problem - did you find a solution yetI bought a used on ls400 ECU from a junk yard but it eeds to be "RESET" how do I do that?

Your radiator could be glogged and causing it to back up out of overflow,drain coolant,if still good,save and remove bottom hose from radiator get hose and insert in radiator and let run and see how flow is,if clooged,go to autozone and tell them what is happening and they will get you what you need to unglog .To check water pump,unscrew radiator cap and put over opening,crank engine,let it get at operating temperature,remove cap and check flow.Click on link to view radiator flush. http://www.autozone.com/autozone/accessories/Fluids-and-Chemicals/Radiator-Cleaner-and-Additive/_/N-262g?filterByKeyWord=radiator+flush&fromString=search

EGR Valve is a possible,maybeIf it has vacuum lines disconnect,plug& road test. If problem goes awayyou replace the egrThere may be other vacuum valve or devicesin the egr system,so best to look at diagramif under the hood to try & get one.All I'm suggesting is separating vacuum issues tothe symptom.Any vacuum leak anywhere will need to be fixed.You need to know if the ignition is a problemThat does not mean start throwing parts at it.Those days of a tune-up are long gone some25 years agoEvery driveability issue has to be diagnosed

you have a small leak somewhere. see a repair shop that deals in gas tanks and have them check it out.

main Compter is bad underneath the dash board repair it it can be fixed

check your fuel pump and or fuel sending unit if it has good pressure sending fuel to the motor try checking your injectors.

Sounds like cam or crank sensor is bad....Common to this problem...hope this helps and if so please rate my post and good luck..

sounds like a loose plug on back of dash

as long as there is not a tiny screw holding it together then just pry the front and back apart with your finger nail or a butter knife. the rest will be easy to figure out.