Question about 1997 Lexus LS 400

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I HAVE LS 400 96 NOT BURN GAS AND WHITE SMOKE AND ENGINE LIGHT ON GIVE MISFIRE COOD

I CHANGE THE DIS AND SPARK B AND WIRES AND COMPUTER AND STILL THE SAME SMOKE WHITE AND SMELL GAS

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  • Lexus Master
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Have a compression test done as I suspect a head gasket or cracked head

Posted on Mar 28, 2014

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Posted on Jan 02, 2017

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SOURCE: Blowing smoke out tailpipes,white to light grey,

your piston ring could be goin bad

Posted on Jul 31, 2009

Mustgo
  • 2359 Answers

SOURCE: idles rough at first start up then white smoke

Is this car driven in a daily basis?
Check with your family member on DO NOT TOP OFF THE GAS TANK.When refueling the top off (excessive gas) will eventually destory the vapor control valve. When the valve go bad the vapor excape to the charcoal clean under the hood.
It's normal to have lite white smoke during the first 15 minutes of warm up. Pay close attention to above normal operating temperture and white smoke after 15 minutes of warmup/drive time.
To pin point a blowing headgasket you will need
1)coolant system compression tester
or
2)chemical reaction test for combustion test gas
If it's the org. engine from 1994,with over 150,000 then blown headgasket is a good possiblity.
Tow it to the shop and let the pro to do the coolant pressure test and combustion gas test.
A full head gasket job with head re-surface (if it can be re-use) is worth it.
Shop around on well estiblished independent shops.
Fix the blown head gasket at the first stage of failure can save you thousand on a head replacement.

Posted on Aug 23, 2009

dschuchman79
  • 13 Answers

SOURCE: 1992 es300 blue smoke from exhaust

The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. So best bet is to have a local repair shop inspect for internal oil leakage.

Posted on Oct 16, 2012

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