1990 Lexus LS 400 - Page 7 - Answered Questions & Fixed issues

the fuse for the cig. lighter is a 15amp fuse,its located under the streering wheel,on the left side,its under there,you'll see a black box wit the fuse indicators on it.

Your alarm is keep your system from starting. When the alarm system fails, you have 1 of two choices, if it is a after market alarm then just disconnect the alarm, if it is a manufacture alarm then you will need to take it to a company to have then replace the alarm or disconnect it. Doing so yourself you can hurt your vehicle more then help it

White smoke is either steam or coolant. Oil smoke is blue, fuel is black. The smoke is water or coolant boiling and then coming out the exhaust as vapor.

If the weather is cold, water will condense in the exhaust system after shutdown, then come out as steam on startup. This is OK. If you see the smoke after driving on the highway for an hour or it is an all-the-time event, you have a problem.

If you have a problem, most likely, at this age, it is a leaking head gasket. Possibly the cylinder head is cracked. Valve problems are possible but less likely. Keep track of how much coolant you add to keep it at the full mark. Obviously, this is expensive to fix.

The problem was bad/worn valve stem seals which allowed oil to seep into the cylinder heads when the engine wasn't running and burn off when the engine was started creating the white smoke. If it is valve stem seals, they are not too expensive to replace however I would suspect your mechanic will want to do a complete valve job which is a little more costly.

Hope thos help (remember comment and rated this).

this could be a starter or the enigtion swicth yes if you crank the key to long it will kill the battery.

there's a under hood fuse 120 amp it does not pull out by hand but is secured to a junction box and there are small short screw holding the fuses there is more than one but when you remove the plastic cover you will see one labeled 120 amp change that out and you solve your problem.

it sound to me like one or both ignition coils may need replacing.

when changing the computer you must first disconnect the battery if you fail to do so you risk damaging the computer and other electrical components. i/e fuses relays and circuit breakers.

I believe you just may be simply out of gas. if that is not the problem it could be a fuse, fuel pump relay or even your fuel pump itself. try that and if that dont work let me know.

change your spark plugs and wires both distributor caps and both rotors.

"YES"

you may want to start by changing the sock [ fuel pump screen ] and after doing so fill your tank up and pour in some injector cleaner and also change your fuel filter.

u will need to remove tires and support car on jack stands under the hood u will find three nuts holding the strut up u can only pull strut off once u hav removed all other bolts from below car... go to auto zone.com and look up repair manuals they will be free after u sign up which is also free

i have a 1990 lexus i'm replacing my front struts, and need directions on how to. Thanks

Ceck the ignition cam sensor must be in proper position with the cam gear.

any colour will do ,just top up with neat antifreeze ,its all the same regardless of the colour

Okay you may want to check to see if the sensor on door lock cylinder hasn't fallen off from the lock itself. Pull of the door panels and check the wires at the door lock cylinder. Hope this helps.

This has to do with the front brake caliper on the left sticking or the front right is not activating. Remove the front wheels and check the caliper for proper movement and pad wear. Try to rotate the front left and note any heavy resistance. Also check all tires for proper pressure.

the fuse box is located on the drivers side nearest to the center, the fuse is number 10, this fuse also protects the Alarm system and Airbags

loose body ground clogged fuel filter bad gas or fuel pump or wiring loose on fuel pump

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.

I do not know if you still need this information, but I am going ahead and answering it anyway. You may want to Print the Diagrams for future use.

CLICK on the following LINK. It has the Belt Diagrams you will need.
If you would: Before Clicking: Let me know if this helped you, or if you have any additional information or questions. Feel Free to contact me at FixYa.com!
Again my apologies...

http://www.2carpros.com/car_repair_information/year/1990/make/lexus/model/ls_400/1990_lexus_ls_400_drive_belt_routing_diagram.htm