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1993 Lexus LS 400 loss of power

Tiny
TINTMAN
  • MEMBER
  • 1993 LEXUS LS 400
  • V8
  • RWD
  • 150,000 MILES
I was driving around a interstate ramp and when I got to the interstate lost power by the time I got off on the next exit there was smoke coming out from the back of the motor and there was barely any acceleration the car ran perfect before this just had a tune up check the fuel pressure checked the cats check the ECU check the coils there is no check engine light I can't think of anything else to check also checked the mass airflow sensor all of which were not the problem im Stumped led to believe that might be something electrical if everyone can help me out it would be greatly appreciated
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Saturday, May 24th, 2014 AT 12:18 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
When was the timing belt changed? It needs to be doen by 100k.

Roy
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Saturday, May 24th, 2014 AT 5:19 AM
Tiny
TINTMAN
  • MEMBER
  • 3 POSTS
Timing belt hasnt been done but hasn't broken I have the timing belt kit and was waiting to fix this problem before doing the timing belt
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Saturday, May 24th, 2014 AT 7:44 AM
Tiny
ASEMASTER6371
  • MECHANIC
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It does not have to break to be bad. It may have streched and cuased the timing to be off. It may also have sheared off some teeth rendering it not working
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Saturday, May 24th, 2014 AT 7:49 AM
Tiny
TINTMAN
  • MEMBER
  • 3 POSTS
Ok so I will go ahead and change the timing belt any other ideas? Why the smoke coming out of the back of the motor if it is the timeing belt?
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Saturday, May 24th, 2014 AT 8:06 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
From the timing beign off. Make sure you do a compression test to verify there are no bent valves

Roy
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Saturday, May 24th, 2014 AT 8:08 AM

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