Question about 1991 Lexus LS 400

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I have a 1991 lexus ls400 and when i start after it has been sitting all night it blows kind of thick grey smoke form the pipes for about 3 minutes but there is no overheating or sign of a head gasket problem but the check engine ligth just came on.

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Gas treatment.

Posted on May 18, 2010

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Posted on Jan 02, 2017

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1 Answer

91 lexus ls400 will not start


Could be several things.
If the head gasket is blown, you may have lost compression in the cylinders. You may have also damaged the spark plugs with coolant.

Jul 28, 2012 | 1991 Lexus LS 400

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Smoke from exhaust when start ls400 model1991 lexus


That sounds like either your valve seals/stems. What color is the smoke? Are you sure its not just steam? Does it disappear after a couple of seconds? Please reply

May 17, 2011 | 1991 Lexus LS 400

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I had a new water pump and timing belt put on my 1991 lexus ls400, but i see white smoke coming from the tailpipe and when i put coolant in the reserve tank it leaks out but not on the ground. Can someone...


could be the head gasket gone, if you take it to a garage they can do a test on it which will take about 10 minutes, if you are leaking water but not on the floor there is a good chance its going into the exhaust which will cause steam(white smoke) out the exhaust

Jun 12, 2010 | 1991 Lexus LS 400

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Heater blows cold 91 lexus ls400


Sounds like a thermostat problem replace it

Jan 23, 2010 | 1991 Lexus LS 400

2 Answers

92 lexus ls400 lets out a puff of smoke when u start it up but doesn't after start up


check power steering levels i have the same year Gen I-III have a power steering defect PS fluid pumps into system then out tail pipe, white smoke.Lexus fixed this in later models.. check lexls.com the solution is there.

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Dec 24, 2009 | 1992 Lexus Ls 400

1 Answer

My 1991 Lexus LS400 is beginning to have a smoking problem. Whenever I start the car (whether cold or hot) it will emit smoke (small cloud, but getting larger) from the rear mufflers. (smoke smells like...


depending on the color of the smoke,but try a few gas treatments.after ur next fill up,but a gas treatment n fuel tank&take her on the interstate and open it up(drive fast within speed limit lol).

Nov 09, 2009 | 1991 Lexus LS 400

1 Answer

Smoking battery cable


cable and battery needs to be replaced you lost your ground and battery shorted out this will fix ut problem

Dec 05, 2008 | 1991 Lexus LS 400

1 Answer

1991 LS400 sudden power loss


You just go to the link I attached I'm sure you will get the solution of your problem 1991 LS400

Oct 11, 2017 | 1991 Lexus LS 400

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