This time I was lucky enough to duplicate the problem a couple times after returning home, and did a little troubleshooting with the voltmeter.
Well, I gained a little more experience with the problem today as it happened while out shopping.
#2004 ford taurus fuel pump problems full
If this has indeed solved the problem, then I may look into full replacement of the connectors. Ideally, one should probably replace the connectors in the fuse box altogether, but this may not be a simple task.
My theory is that the oxidizing or "glazing" effect caused by the current flow through the relay connectors over several years (evidenced by the discoloration on the relay pins) was providing enough resistance to keep the relay turn-on voltage just low enough that the relay wasn't always able to fully activate and provide a constant source of power for the fuel pump. After several test runs and about a week of normal driving, I haven't had a recurrence of my problem since doing this, but I'll be more confident it's fixed after a few more weeks without incident. I then folded some fine grit sand paper (wet/dry type) and sanded the inside of the two large pin receptacles for these two relays in the fuse box (These are the power supply connections for the fuel pump and likely have discoloration on the pins of your relays from the heat.) Before re-inserting the relays, I lightly coated all pins with dielectric grease to try and get the best possible connection. However, this time I only had to wait a few minutes to restart instead of 30 minutes or more as before, so I thought I might be on the right track. After replacing both the fuel pump relay and the PCM relay (located in fuse box near radiator), I still had the engine die (twice) due to fuel pump shut-off about 30 seconds after starting the engine and driving away. What could occasionally interrupt power to the fuel pump and reset itself after a short time? Is there a computer control or other electronics that are tied to the fuel pump operation and could temporarily have a glitch?Ĭlick to expand.I may have fixed the problem, but only time will tell. The Ford dealer has no clue what is happening. There are no diagnostic codes and mechanics are baffled. I am 99% certain that it can't be a bad fuel pump, as a fuel pump would malfunction more than once every few weeks and would not likely reset itself after a 30 minute rest. I have replaced the fuel filter and fuel pump relay and plan to replace the inertia switch (just in case). It occurs regardless of fuel level, ambient temperature, vehicle temperature or anything else. It only happens right after initial startup (power is actually probably interrupted before the car even starts), if it's going to happen at all. The car doesn't die if it makes it past the initial minute of operation and has never died driving long distance. If the vehicle is left to sit for 30+ minutes, something apparently "resets" and the fuel pump can be heard to run when the ignition is turned on and the vehicle starts normally. After this occurs, I can tell that the fuel pump is not running when I turn on the ignition switch (there is no short "runup" of the pump as there normally is). I will start the car and drive about 45 seconds and the engine dies. The problem doesn't consistently happen, and only occurs after the car has been shut off and restarted, sometimes weeks between incidents. I have a 2000 Taurus, DOHC V6, auto trans, that has a problem with something occasionally shutting off power to the fuel pump. I am having a difficult problem to diagnose and hope somebody else may have already seen this and solved it.
0 kommentar(er)
