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3 thing to check
1.Fuel pump relay
When you turn the igntion key to the on position you should hear a click on then after about 2-3 seconds a click off,your fuel pump will be getting power while the relay is clicked on. If yo dont here a click it could just mean that you have a quite or external relay. If you have a multi meter then you can test this by putting the - to - and the + to + and getting someone to turn the key to the "on" position. If you get a reading then your relay is fine, If your pump is not making a noise go to step 2.
2. Fuel pump is working
What you can do it get 2 small wires and connect it to the fuel pump its self making sure you have the positive and negative correct. Then touch it to the battery, If the pump operates then the pump is fine.
3. Check your filter.
it may be blocked and stopping fuel getting though the filter to the engine.
the oil pressure sensor has a 3rd wire which feeds to the fuel pump .. If you turn the ignition key on and do not hear the fuel pump running for 5 seconds, replace that oil pressure sensor. That sensor does turn the fuel pump circuit off once oil pressure is acheive and the the computer switches the fuel pum relay on to take over running the fuel pump
if you have no fuel when the and it just wont start it may be the crank position sensor if it's the 4.0l engine the crankshaft position sensor is on the top of the transmission bell housing on the driver's side and can be accessed from underneath the vehicle and is plugged in at the back of the intake manifold
Sounds like the problem might be in the relay but before replacing that relay, check all fuses and especially any ecm fuses. Do you have a check engine light come on when you turn the key to the on position?I believe that on this vehicle there is a relay that is labeled "eec relay" this is the relay for the power to the ecm. eec stands for "electronic engine control" If this circuit is dead the fuel pump relay will not come on either, but worse than that the ecm stays dead and the injectors are not delivering the fuel to the engine even when you jump the fuel pump manually.
Check these items and make sure that the computer is getting power and I think you problem will be found.
There is a black wire with a connector like thing in it near the battery cable on the negative post make sure that this connection is good ,it is the ecm ground and the same symptoms will happen if it is not connected well.
the book just told me the fuel pump relay is near the ecm under the center console and to test it put the positive to terminal 10 and negative to terminal 8 and with power to the relay connect the negative probe of a voltmeter to the battery negative terminal (where the - is to the relay) and connect the positive to terminal 4 then 5 it should read out about 12 volts at each terminal, connect the jumper leads terminal 9 to battery (+) and terminal 6 to the battery (-) and with those relays connected to the relay check for continuity between terminals 3 and 2 there should be continuity remove the ground from terminal 6 the ohmmeter should read now read no continuity install jumper lead to terminal 3 to battery (+) and terminal 7 to battery (-) check for voltage at terminal 2 and battery (-) should be about 12 volts remove (-) from terminal 7 now should read nothing if anything doesn't read out what i said replace it and the numbers for he terminals start from the plug part you had to push on to remove the wires it goes 1-5 on the top and the bottom 1-6 and this would be with the clip on top if this did not help let me know i will read off the next part to check