How do you deal with Mitsubishi fuel pump relay problems? Can a fuel pump relay be repaired? If the fuel pump does not work correctly and is not repaired it could cause more damage. The insights of Experts will give you the answers you are looking for. Read below where verified mechanical Experts have answered these questions and more.
How to determine if the fuel pump relay on a 2000 Mitsubishi Eclipse is defective?
Checking the functioning of the fuel pump relay is a two person job. One person will need to access and open the under hood fuse box to locate the relay and place a finger on it. The second person will then need to crank the engine. If a click can be felt on the relay while the engine is cranking, it is most likely good. To remove the very slight possibility of an internal failure of the relay, it can be swapped with the adjacent one. If the fuel pump now operates when the engine cranks, then the relay has failed internally. If not, then either the fuel pump has failed or there is a problem in the wiring going to it. Since the fuel pump relay does not have fused power, there is no possibility of a blown fuse.
How to confirm the fuel pump of a Mitsubishi Montero Sport has failed?
Fuel pump failures on the vehicle are extremely rare and unless the OEM pump has been replaced with an aftermarket unit, this is the least likely possibility. More common is a failure of the fuel pump relay. This is located in the passenger kick panel. Unplug the relay and bridge the three black/white striped wires together. (Be careful not to touch the white/red strip wire. This is the PCM wire and bridging this could result in damage to the PCM.) If the pump is working, it should come on when the three wires are bridged. If not the pump may have failed. The pump does not have a dedicated fuse to it. It runs off the IG1 circuit of the ignition switch and if there is a problem here, a large number of other functions would be non-operational.
What could cause the fuel pump on a 2004 Mitsubishi Galant ES 2.4 to stop working?
Case Details: The crank position sensor has been checked and is working correctly. The fuel pump relay appears to be in working condition.
If the crank positon sensor is okay, a problem with the fuel pump relay is the likely reason. This vehicle has two fuel pump relays and both must be operational for the fuel pump to work. They are located in the relay group in the dash. The first relay is located in the bottom corner of the group and the second one should be to the right of it with one blank space in between them. (It is common for these relays to be wrongly re-installed after diagnostics checks are done. If the relays are next to each other, they should be refitted as mentioned above.) Put a finger on each relay and one should click when the ignition is turned to the ON position. The second should click when the ignition is turned to START and the engine begins to crank. If either of the relays do not click, that is the faulty one. If both click as they should, then the fuel pump and the wiring to it should be checked.
Can a fuel pump relay be affected by high ambient temperatures and affect the engine starting?
Case Details: The vehicle will not start when the cabin temperature is very high. After the temperature drops, it starts without a problem.
The MFI/fuel pump relay on the vehicle is also the main relay for the main onboard computer (ECM) and the fuel injectors. Any problem here will prevent the vehicle from starting. It is located in front of the shifter below the central dash area. This is the only component inside the cabin that could be affected by high ambient temperatures. It may not work when hot and function properly when the cabin temperature drops.
Where is the fuel pump relay located on a 1997 Mitsubishi GT3000 with a 3.0 non turbo SOHC engine?
Because design changes made in mid-1997, there are two possible locations for the fuel pump relay in this vehicle. For vehicles made late in that model year the fuel pump relay will be just behind the under hood relay center towards the windshield side. The air box and duct will probably need to be removed to access it. The location is shown in this diagram:
In the case of vehicles made early in the model year, the MFI and fuel pump relays are paired together. In this case they are behind the carpet panel on the passenger side of the central console as shown in this diagram:
The fuel pump relay is the one with two black/white striped wires in it. The other one is the MFI relay.
A faulty fuel pump relay is one of the many causes of fuel supply problems. The answers of Experts will help you to determine if you have Mitsubishi fuel pump relay problems. Verified mechanical Experts are readily available to provide you with customized, timely answers.
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