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My Lexus ls 400 1992 is running really rough like it's missing and the exhaust is very strong

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  • 12 Answers

It's probably a clogged catalytic converter.

Posted on Mar 28, 2014

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: car will start then runs rough then quits

you should have you car scanned you may have coolant sensor problems or O2 sensor or flow meter these three sensor control rich or lean to your module pcm by scanning you'll pin point the problem some auto parts like pep boys or western auto or auto zone will scan for free I hope this information is useful good luck

Posted on Jul 27, 2009

  • 1187 Answers

SOURCE: Fuel running rich, blowing gas out of one side of exhaust

One of the fuel injectors is leaking.
It is sending gas out even during the exhaust stroke.

You may be able to "hear" which one it is by using an auto stethoscope ($12) (like a doctor uses) and listen to each one of the injectors.

replace the faulty injector ... or use a can of fuel injector cleaner (name brand, not store brand) ($8).

Any auto parts store (Like AutoZone) will have it.

Hope this helps, soon!

Posted on Sep 10, 2009

  • 400 Answers

SOURCE: strong gas smell coming from my cobalt at all times

Look in the back of the car. The fuel pump lines like to break. You will not be able to see them, but you will smell and see that the fuel tank is wet. Call your local dealership, have you vin # and milage, ask them if it's covered by warrenty.

Posted on Oct 18, 2009

  • 495 Answers

SOURCE: run rough at low speed

Possibly there is to high of a mixture of gasoline going into the cylinder. It might be a computer problem, the dealership/garage with a Tech2 would be able to tell you for sure.

Posted on Oct 19, 2009

  • 1348 Answers

SOURCE: Fuse Box ( cover) diagram for a 95 Lexus LS 400 is missing.

check the wiring harness beside the hinge that moves when you close the trunk.i have seen the wiring get pinched and the ground gets broken. the tail lights have separate left and right side fuses.get a test light,and with the ignition in the on position,there should be power on both sides of all the fuses.the atc type have little test pins on them.ground the test light and put the tip on the fuse.if there is power,the light will come on. if a fuse does not light up the light on both sides,it is open.since the fuses are see thru,it is apparent if it is blown as the metal inside will be burnt.

Posted on Oct 23, 2009

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1 Answer

What is wrong with My Lexus LS 400, reverse gear was burnt but was fixed. After repairs it started consuming much fuel, raw fuel comes out of the exhaust, the oil was changed it was mixed with Fuel.

You really need this fixed fast for if you have raw fuel coming from your exhaust your catalytic converters must not be working. If they were working they would be running a extremely high temperatures and be a fire hazard.
You most likely have damaged exhaust valves causing this problem, a compression test will confirm if this is the case. The other possible causes are bad injectors, coils, spark plugs and ignition timing.

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Large thump noise and wouldn't start. Then got it started and car was missing really bad and white smoke coming out of exhaust when I accelerated

Your car has what is called a blown head gasket. The thump you heard was the coolant in the cylinder. The white smoke you are seeing is the coolant leaking into the cylinder and burning. that is well is what is causing your rough running problem. I hate to be the barer of bad news but this can be a costly repair. Usually around 1200.00.

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Car engine is running rough sounds like a miss the what I believe is a catylitic converter connected to the exhaust manifold on the drivers side gets glowing red I was told this is do to it being clogged...

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Feb 22, 2010 | 1993 Lexus LS

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Backfiring, rough idel

I would check the exhaust pipe a little closewr. White smoke can also mean a blown head gasket. Check the tail pipe to see if moisture is present. Also check coolant level. A blown head gasket can also cause related problems.


Nov 19, 2008 | 1999 Pontiac Grand Am GT

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Running rough

Hi, runing rough can be caused by several things, you can start by checking the simple ones first, fuel filter, air filter, spark plugs, add a good injector cleaner and leave the car runing for some twenty or thirty minutes ,if it dosnt change,you may get the injectors cleaned by a pro shop.....good luck....

Aug 31, 2008 | 1993 Lexus Ls 400

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