1994 MITSUBISHI Montero LS. After driving it for 30 minutes and letting it set for 2 hrs, it will crank but not start. Let it set for ten more minutes then try again and it will try and eventually spu

SOURCE: Truck runs fine till reaches running temp then dies, no spark

Sounds like a bad ignition coil. Have it tested.

SOURCE: how to change the fuel pump on a 1994 Mitsubishi Montero LS 3L V6

just for you REMOVAL & INSTALLATION
See Figures 1 and 2
WARNING In almost every case, replacing the Mitsubishi electric fuel pump requires removal of the fuel tank. Please refer to the fuel tank removal and installation procedure at the end of this section.

1. Lift or move aside the carpet in the rear cargo area.
2. Remove the oval cover plate from the access hole.
3. Disconnect the fuel pump harness connector at the rear of the fuel tank.
4. Start the engine, allowing it to run until it runs out of fuel. This relieves pressure within the fuel system.
5. Turn the ignition switch OFF and disconnect the negative battery cable.
6. Remove the fuel filler cap.
7. Drain the fuel from the fuel tank into suitable container(s), each with an airtight lid.
8. Carefully, and using two wrenches on the fittings, disconnect the high pressure fuel line and the main fuel line from the pump. Remove the high pressure fuel hose at the body-side main pipe connection, unfasten the pump-side connection. Wrap each joint in a rag before loosening; some pressure may remain within the system.
9. Remove the fuel pump retaining nuts and carefully remove the pump from the tank.

The fuel pump may still contain liquid fuel. Drain it into a suitable container with an airtight lid before performing any tests or inspections.
To install:

1. Carefully install the pump into the tank and install the 6 retaining nuts onto the studs. Tighten the nuts evenly and in a crisscross pattern to 12 ft. lbs. (16 Nm).
2. Reinstall the high pressure and supply line to the pump.

WARNING Take great care when connecting the threaded high pressure lines. Start the threads by hand, then, while holding the hose side to keep it from turning, tighten the flare nut to 27 ft. lbs. (37 Nm).

1. Connect the pump wiring harness.
2. Connect the negative battery cable. Turn the ignition key to ON but do not start the engine. You should hear the pump running. Allow it to run for about 10 seconds to build line pressure, then start the engine.
3. After the engine has run smoothly for a minute or two, shut the ignition off and check the work area for any trace of leakage. Attend to any fuel leaks immediately, remembering that the system has repressurized and must be handled safely.
4. Reinstall the cover on the access hole and replace the carpet in the cargo area.

Fig. 1: Components of the fuel pump and fuel tank Fig. 2: Components of the fuel pump-all models similarTESTING
When diagnosing engine problems, particularly a "no start" condition, the fuel pump function should be checked. Because of the difficulty in reaching the fuel pump connections, Mitsubishi automobiles have a conveniently located test connector under the hood. V6 Monteros have the connector taped to a wiring harness inside the right front kick panel, near the ECM and relays.
This connector bypasses all of the controls in the system (ignition switch, pump relay, etc.) and sends voltage directly to the pump. When power is applied to the pump you should be able to hear it running, although the in-tank pumps require you remove the fuel filler cap and listen at the filler.
To use the test connector, make certain the ignition is OFF. Great damage may be caused if the system is tested with the key on. Locate the test connector in the engine compartment (on later Monteros it is located under the right-hand side of the dashboard)-it is generally on a short lead out of a wiring harness and looks like a plug that isn't connected to anything. Once found, use a jumper wire to connect the test terminal to the positive battery terminal. Listen for the fuel pump; if it runs, you know the pump motor is good. While the pump is running, gently squeeze one of the fuel lines and confirm that the pump is delivering fuel pressure. If it does not run, the pump itself is most likely defective OR the connector to the pump is faulty.
When the pump is removed from the tank, it may be checked by applying battery voltage (+) to the connector and grounding the housing. Only run the pump for one or two seconds during this test; the pump can be damaged by running without liquid.
CAUTION Make certain the pump has been drained of residual fuel and is free of fuel vapors. Connecting and removing the test leads will cause sparks which can ignite any vapor in the area.

SOURCE: My 1994 Mitsubishi Lancer (4g15) engine stops

Fuel pump

Testimonial: "It's the fuel pump indeed. Also the gas tank found to be very dirty. The fuel pump was replaced, fuel system cleaned, now the car runs perfectly."

SOURCE: I have a mitsubishi diamante 01 ls im having

Hello, welcome to FixYa...your descripton indicates it's a heated 02 sensor that is setting the code...why would you not replace the correct one the first time if in fact it really does need to be repalced? ---80% of the time an 02 sensor code is set there is nothing wrong with the sensor itself, the sensor is doing it's job, it has detected a malfunction and reported it to the ECM, the ECM turned the service light on, that is what sensors do, that is how they work. I have seen motorist spend over $700 dollars on sensors and still have the same problem. On average the life of an 02 sensors is 60-80k. A good technician will know if a sensor is bad from the voltage it's drawing. You could have a dirty fuel injector or MAF sensor resulting in a rich or lean fuel mixture that caused the 02 code to be set. I hope you understand by this explanation, that even by replacing the $380 sensor there is no gurantee the problem has be repaired. A good diagnostic scan and someone that knows how to read the feedback from that scan could give you a clear cut decisive repair procedure.
I hope this helps and best of luck with the Diamante...

SOURCE: 1996 mitsubishi shogun loss of power

Hi Trevor, Please let us have the engine type, as that will help us help you diagnose the problem. In the meantime here are some suggestions. take off the ducting to the turbo and look to see if there is oil contamination in the inlet from the turbo. It is not unusual for those units to become worn and then begin burning oil by leaking it past the seals. If the turbo shaft has any drag, that would also indicate excessive wear, indicating a replacement is required. If the head and rotor are damaged or worn, that would usually present as a problem with starting, especially when cold. Defective injectors could also cause the problem. Piston rings may also be damaged and worn. It is advisable to service turbo induction vehicles used in dusty conditions every four thousand kilometers, much less than normally recommended by manufactures. I would hope that you have replaced the filters with new and that they are of good quality. If they are substandard, they could be blocking fuel flow to the injector pump. Let me know how you get on. Regards John