Question about 1993 Toyota Corolla

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AIR LEAK IN TOYOTA COROLLA FUEL TANK

INSTALLED ALL NEW RUBBER SEALS , INLET, FUEL GAUGE SENDER, AND THE TWO CIRCULATORY SEALS AT THE TOP OF GAS TANK, AND STILL WON'T PASS INSPECTION. IT WAS LEAKING FROM THE TOP OF TANK , NOW ITS DRY BUT STILL NOT PASSING 1 LB. PRESSURE TEST ON GAS CAP. YES ,BUT IT IS ON THE BOTTOM OF THE TANK WHERE THE EXHAUST SHEILD IS. i HAVE REPLACED THE TANK ONCE AND NOW I HAVE A LEAK IN THE SAME PLACE.

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You'r EVAP system is not purging the system . I suspect it is your charcoal canister located in the left side of the engine compartment located near the master cylinder its a piece of cake to change it just slides up after you diconect the lines .

Posted on Oct 27, 2009

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SOURCE: AIR LEAK IN TOYOTA COROLLA FUEL TANK

Best bet is to replace gas tank. It could hae a hairline fracture somewhere. Sounds like pretty much everything else was replaced already.

Posted on Jan 26, 2009

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Removal & Installation

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Exploded view of the fuel sender, including the fuel pump


Click to Enlarge
  1. Properly relieve the fuel system pressure

  1. If not already done, disconnect the negative battery cable.
  2. Raise and safely support the vehicle with jackstands.
  3. Safely drain and remove the fuel tank assembly as outlined later in this section.
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  5. Using tool J 35731, or an equivalent spanner wrench, remove the fuel sender lockring.
  6. Lift the sender assembly carefully out of the fuel tank.
  7. Remove the sender O-ring from the top of the sender and discard.

WARNING Do NOT run the fuel pump unless it is submerged in fuel. Running the pump dry will cause serious damage to the fuel pump and may cause the pump to explode due to the oxygen in the air.


  1. Note the position of the fuel pump strainer on the fuel pump and, while supporting the pump assembly in one hand, twist the strainer off the pump and discard the strainer.
  2. Detach the fuel pump electrical connector.
  3. Remove the clamp from the fuel line at the top of the pump.
  4. Hold the fuel sender upside down on a work bench and pull the fuel pump out of the lower mounting bracket. Once the pump is clear of the lower mounting bracket, tilt the pump outward and disconnect the pump from the sender assembly.
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  1. Replace any attaching hoses or rubber sound insulators that show signs of deterioration.
  2. Install the rubber bumper and insulator on the fuel pump.
  3. Hold the fuel sender upside down and install the fuel pump between the fuel pulse dampener and mounting bracket.
  4. Attach the fuel pump electrical connector.
  5. Install the retaining clamp on the fuel line.
  6. Install a new fuel pump strainer on the outer edge of the ferrule until fully seated. The strainer must be facing the same direction as it was before removal.
  7. Position a new O-ring on the top of the fuel tank and install the sender assembly.
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  9. Install the fuel tank as outlined later in this section.
  10. Refill the gas tank.
  11. Connect the negative battery cable.
  12. Turn the ignition switch to the ON position to pressurize the fuel system and check for leaks.

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  2. If not already done, disconnect the negative battery cable.
  3. Raise and safely support the vehicle.
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1 Answer

AIR LEAK IN TOYOTA COROLLA FUEL TANK


Best bet is to replace gas tank. It could hae a hairline fracture somewhere. Sounds like pretty much everything else was replaced already.

Jan 12, 2009 | 1993 Toyota Corolla

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