What causes the pressure in the fuel tank to build up enough to blow the rubber line off the fuel pump outlet port?
- Old Man DirtLv 75 months ago
A missing clamp on the fuel line and or stuck fuel regulator.
- GabeLv 65 months ago
You want the quick and dirty version or the long complicated physics version?
- thebax2006Lv 75 months ago
There's not enough pressure in the gas tank to do that.
The fuel pump puts out 50 to 70 PSI. You just had a bad fuel line or possibly a plugged return line.Source(s): Mitsubishi Master Tech
- DanLv 45 months ago
A stuck fuel pressure regulator. The pressure isn't going high in the tank, it's going high in the line. The FPR allows fuel to bleed back to the tank once it reaches a certain pressure designed into the FPR, let's say 40 psi for argument's sake. If the regulator gets stuck the fuel pump can drive line pressure up around 100 psi.