- #1992 ford explorer fuel pump replacement forum full
- #1992 ford explorer fuel pump replacement forum code
If the fuel pump relay suddenly fails, it will light up the check engine light and store a trouble code on the fuel pressure. The ECU monitors the fuel pressure with the help of the fuel pressure sensor. A check engine light is also the most common sign of all bad fuel pump symptoms. If the ECU suspects a wrong value from any sensor, it will light up the check engine light. The engine control module does always monitors all engine sensors to ensure they do not show the wrong values. Here is a more detailed list of the most common symptoms of a bad fuel pump relay. The relay can fail due to many reasons, from dust to electrical power surges, anything can affect the well-being of a fuel pump relay. You can also notice signs like rough acceleration. You will probably see these signs along with a check engine light on your dashboard.
The most common symptom of a bad fuel pump relay is a stalling or dead engine. Is there a way for the running pump to receive fuel from the other tank? I know there are valves and such in the fuel pump/sender modules in each tank.Can you clean or fix a fuel pump relay? 5 Bad Fuel Pump Relay Symptoms However, this truck has the one way valves for the recall installed. I am aware of the fuel tank return line issue with fuel being transferred from one tank to the other. So, I think the gauge is measuring the amount of fuel in each tank correctly. I tried to put some gas in the front tank, but it wouldn't take it. It took it all and that pushed the gas gauge up to three quarter tank. I then drove the truck to a gas station, and pumped $20.00 worth of gas in the rear tank. These guage readings matched the readings obtained using the switch. I then jumpered the rear fuel pump, and rear fuel sender.
#1992 ford explorer fuel pump replacement forum full
As expected the gauge read nearly full for the front tank. I went out and jumpered the front fuel pump, and also jumpered the front fuel sender. Does anyone have any insight as to what is going on? How do I further diagnose the problem? I don't feel like throwing a bunch of money buying fuel pump modules if that isn't the real problem. I also jumpered the connector from the selector switch to select the front fuel pump and it does operate. I have removed the selector switch and checked it with a digital multimeter and the switch seems to function properly. I have also verified that only one fuel pump runs at a time (i.e. First with the selector switch on the front tank the then with the selector switch on the rear tank. I also stuck a small tube into the tank and put the other end in my ear and can hear the fuel pumps running. I repeated this same test with the rear tank. I can feel the vibration of the front fuel pump running while the engine is running.
I then held my hand against each tank to feel the vibration of the fuel pump and after verifying the front pump is in fact running started the truck. I then repeated the test with the selector switch set to the rear tank and the rear fuel pump runs for a short burst. The front pump runs for a short burst when the key is turned on and the selector switch is set for the front tank. I have gotten under the truck while a helper turns the key to the on position, engine off. It seems the truck is drawing fuel from the rear tank, even though the selector switch is set for the front tank. However, when I switch to the rear tank, I notice that the fuel gage is down quite a bit. The fuel gage needle does not come down off of full. I have been running the truck with the tank selector switch set for the front tank. After the replacement the tanks were filled with fuel. Recently replaced the fuel tanks due to rust/leaks. There is no distribution valve on the frame rail. There is no third pump on the frame rail. There are two high pressure pumps, one in each tank. I have a 1992 F150 4x4, dual tank, 5.0L, with fuel injection.