20 Most Recent 1990 Lexus LS 400 - Page 9 Questions & Answers


Hi! Have you checked the distributor rotor? This may cause a no spark too. If its good then the last resort is replacing the engine control module or the engine control unit. Hope this helps and have a good one!

1990 Lexus LS... | Answered on Jun 19, 2010


Check coolant level in the overflow bottle.
Have you ever had the coolant system flushed and replaced?
Is the temperature indicator light on?
Any fluid leaks?
Check those as well.

1990 Lexus LS... | Answered on Jun 13, 2010


its possible with a remote start system

1990 Lexus LS... | Answered on Jun 09, 2010


If it has r12 in it just drain it out and recharge the system with R134A.

1990 Lexus LS... | Answered on Jun 07, 2010


then it's probably a ground wire that isen't atached

1990 Lexus LS... | Answered on Jun 04, 2010


Hello. Any car with 200K has reached it's life expectancy. I would not recommend this car as Lexus parts are often very pricey. Some head light lamps, for instance are $400.00 alone. Joe

1990 Lexus LS... | Answered on May 23, 2010


fuel pump might be bad or oing bad.

1990 Lexus LS... | Answered on May 18, 2010


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.

1990 Lexus LS... | Answered on May 18, 2010


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

1990 Lexus LS... | Answered on May 17, 2010


I would inspect your wires at the starter. If you live up north then corrosion is bad, clean all wires going to starter. then clean wires to back of alternator. I seriously doubt that alternator is the problem, but if you remove it you can have it tested for free at most parts stores.

1990 Lexus LS... | Answered on May 16, 2010


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).

1990 Lexus LS... | Answered on May 10, 2010


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

1990 Lexus LS... | Answered on May 05, 2010


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.

1990 Lexus LS... | Answered on Apr 30, 2010


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

1990 Lexus LS... | Answered on Apr 30, 2010


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.

1990 Lexus LS... | Answered on Apr 30, 2010


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.

1990 Lexus LS... | Answered on Apr 30, 2010


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

1990 Lexus LS... | Answered on Apr 30, 2010


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.

1990 Lexus LS... | Answered on Apr 30, 2010


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

1990 Lexus LS... | Answered on Apr 22, 2010

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