Question about 1991 Lexus LS 400

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Car has no power

I cant eccelerate and when i get 55 i get bad surge like it has a fuel problem i replaced the fuel filter and no diff

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  • ugotmayladmo Jul 03, 2009

    fuel runnig rich when i try to accelerate it seems like its flooded out and i get it stalls.

  • Joseph Weisenberger
    Joseph Weisenberger May 11, 2010

    Have you looked into the fuel pump or cleaned the fuel injectors?



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  • 175 Answers

Does it run the same when tank is full as well as almost empty? There is a screen/filter on the pickup in the tank and if it gets plugged up you could have the results that you are getting. Hope this helps. Please rate this. Thanks

Posted on Jul 03, 2009


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Loosing power when driving then after short time power comes back

Here are some things you can try. Check the fuel for water, check the fuel filter. I would try that first before anything else

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How do you know if your spark plugs are the problem?

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Sluggish during ecceleration, loses power

A 16 oz can of SEAFOAM motor treatment into the gas tank.

Purchase SEAFOAM at walmart, NAPA, auto parts stores.

Around $9.00 a can.
Be careful putting this stuff in the tank, don't spill on the car's paint!

I do not work for seafoam, I use this stuff and it works!

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Ive had my fuel pump replaced. Now, after driving for 10 minutes, the engine loses power and stepping on the gas makes it worse. Tech hooked up a fuel pressure gauge and noticed engine fuel pressure is...

if power fine and no fluctuation than the pump itself is problem or problem with filter new doesnt mean cant be faulty also listen to pump if hum goes high /low than pump is surging and is faulty if pump stays steady and pressure test is steady when teted before fuel filter than problem with filter or line

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8valve or 16v valves, big diff !

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for surge check fuel pressure.

i think you mean Wide Open throttle has full power

if yes , the fuel pressure is ok
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