1993 LEXUS LS 400 PLEASE HELP!!!

  • Tiny
  • at_the_end10
  • 1993 Lexus LS 400

Smells problem
1993 Lexus LS 400 V8 Automatic 242000 miles

i have a 93 lexus ls400.I have fixed everything on the car. I fixed the timing belt. Its PERFECT. Changed the starter, the sub throttle sensors, O2 sensors, and crank sensor. Now there is black smoke coming out of my exaust and it smells really bad. What do I need to do.I dont know what to do with this car anymore.

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Saturday, July 31st, 2010 AT 9:44 PM

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  • Tiny
  • mhpautos
  • Expert
  • 30,591 posts

Hi there,

This smoke is an indication that it is running extremely rich, maybe to the point that an injector has failed, get a fuel rail test done and see if it holds pressure, a stuck injector will bleed off fuel rail pressure, start here.

Mark (mhpautos)

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Saturday, July 31st, 2010 AT 9:47 PM
  • Tiny
  • at_the_end10
  • Member

When we first bought the car in january the car ran great. After we changed the starter the injecters started to click. What does that mean, does that have anything to do with the problem you said.

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Thursday, August 5th, 2010 AT 5:29 PM
  • Tiny
  • mhpautos
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Hi there,

The fuel injector is just an electronic valve that opens and closes depending on fuel requirements, they do click that is the valve working, I am more concerned that one or more are leaking causing your problem.

Mark (mhpautos)

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Thursday, August 5th, 2010 AT 6:35 PM
  • Tiny
  • at_the_end10
  • Member

Is there any way that I can check the fuel test myself. I dont have the money to take to the shop unless I absolutely have to

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Thursday, August 5th, 2010 AT 6:52 PM
  • Tiny
  • mhpautos
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  • 30,591 posts

To do this correctly and get the exact results we need to see there is special equipment needed to test injectors on or off the car, a simple fuel rail pressure test may show up a badly leaking injector, but you still need equipment to do this.

Mark (mhpautos)

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Thursday, August 5th, 2010 AT 6:56 PM

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