
For example, you could have a blown fuel pump fuse, or a bad fuel pump relay or a fuel pump interrupt switch that has activated. This result usually means that the fuel pump is bad but not always. This confirms that the cause of your F150's (Expedition, Crown Victoria, Thunderbird, Cougar, Grand Marquis, etc.) is caused by a lack of fuel.

OK, now that the testing part is done, let's take a look at what your results mean:ĬASE 1: If the fuel pressure gauge registered 0 PSI.

Your fuel pressure gauge will register one of the two following results:ġ.) The fuel pressure gauge will register 35 PSI, orĢ.) The fuel pressure gauge will register 0 PSI.
