In order to "test" your fuel pump, I need for you to understand a few things. Your's and cars nowadays have a fuel pump relay. This only primes the fuel system for a few seconds when you first turn the key on or off. It is the oil pressure switch that runs the fuel pump when the engine is running and you are driving. So, first of all, when the engine dies, turn the key off and back on and see if you hear the fuel pump run. Then see if it starts. If it does, then there is a problem with your oil pressure switch or the wiring to it. These new oil pressure switches have 4 wires. 2 for the fuel pump and 2 for the oil light or gauge. Also, carry a can of starting fluid and when it dies, spray some into the air intake and see if it hits. This will tell you if you have an ignition problem with some part of the spark system breaking down, cooling off, and then working again.[/Quote:5898a220cc]
Yeah we tried that, and we could hear the pump. But it wont start again untill it cools down. I just talked to my mechanic, he said that the fuel presure is only 30psi after the engine died. And he tried the trick with starting fluid and the engine started fine. I remember before, all the other pumps that I replaced I could tell that they will die because they had wierd unsteady sound right before they died. So something is killing the fuel pumps. Could it be electrical problem or maybe sludge or something in the fuel tank? Thx.
Friday, May 19th, 2017 AT 1:38 PM