Question about 1992 Lexus Ls 400

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1992 Lexus LS400- slowing down on interstate for no reason, then speeds up, slows down. Is this possibly throttle issue

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  • Anonymous Apr 21, 2009

    I think the 2 dealers who diagnosed my problem would have picked up on a fuel pump problem. The first dealer changed the throttle position sensor and it worked well for several weeks. Then it happened again. The next dealer could not find anything wrong so after having the car for two weeks, I left having nothing done. They hope it was a fluke....So I am on pins and needles with a 500 mile drive facing me in a couple of weeks.

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Had the same problem with mine...replaced the fuel pump...worked like a charm...

Posted on Apr 17, 2009

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