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96 Toyota 4 runner shakes when gas tank falls below 1/2 full.?

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Old 26 Jun 2010, 04:54 pm   #1 (permalink)
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Default 96 Toyota 4 runner shakes when gas tank falls below 1/2 full.?
Returned from long trip this summer (1300 miles) and started experiencing problems with truck when gas in tank was low (& we had driven over rough road). Had vehicle checked out and 2 cylinders replaced, though that was it. But, problem continued. Now the problem seems to occur even if tank is slightly below 1/2.- and engine light comes on as well. Still not registering anything on any dang computers at mechanics. Thoughts?
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Old 26 Jun 2010, 04:57 pm   #2 (permalink)
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Inquire to your mechanic about "Fuel Pressure Regulator" maybe even fuel pump/ filter. The full tank helps increase pressure, which may help faulty pump or help push fuel through slightly clogged filter. good luck.
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Old 26 Jun 2010, 05:02 pm   #3 (permalink)
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maybe in in tank fuel pump or in tank fuel filter
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Old 26 Jun 2010, 05:03 pm   #4 (permalink)
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As other said could have clogged fuel pump/filter and its best sometimes 2 switch your gas station octane and then gas station...to see its not that gas octane rating or gas station....
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Old 26 Jun 2010, 05:10 pm   #5 (permalink)
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sounds like you loosened the retain ingsystem on your fuel tank. as you use fuel , your tank becomes lighter and starts to bounce around.
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