Fuel tank cavitate while driving have to take fuel cap of to release presume what causes this how can it be fixed

Asked by GuruTLXQD Jun 28, 2018 at 02:16 PM about the 1988 Cadillac Allante FWD

Question type: Maintenance & Repair

1 Answer

103,215

The tank is obviously not venting. Check your EVAP system, a sticking vent valve solenoid or rusted vent line can cause unequal pressures in a gas tank.

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