I have a 1988 trooper II my problem starts with me going to start it. Just kept turning over. I replaced the fuel pump,still no firing. I have power to the pump, checked the leads to the pump,the pump works.I am getting fire from the plugs, the wires are good. just had the alternator tested and was good. Battery checked good also.so now i turn the key and no whirling from the pump. oh and the relay was ok too.what else could i be?? please help

Did you test the fuel pump for power to the fuel pump? If the pump is receiving the correct voltage, then the problem most likely is that the knuckleheads at Walmart fried your fuel pump also.

1988 , that is and old car, and has EFI ,?
has carb. ????? we cant guess this and 88 is transitions year.
to get help , tell engine size and if carb or EFI, we cant guess. that.
is this the gas engine or diesel, yes, they sold both, sigh.
i guess, gasoline petrol engine.
1: gave it a tune up yet?
2: does it have spark on all cylinders?
3: Yes,1&2 does test fuel work.? runs for 3 seconds?
4: will not run on test fuel check compression , a cheap tool.
5: ok compression is good, but runs on test fuel.
6: bad fueling. fix that. (cant help with out engine type, EFI type or CARB facts.

btw, all these facts are on alldata.com if you choose to look.

now the engine line up
preplexing, huh, we cant see engine, so cant help. at all.
2.0 L G200 I4 (UBS13)
2.3 L 4ZD1 I4 (UBS16)
2.6 L 4ZE1 I4(UBS17)
2.2 L C223 diesel/turbodiesel I4(UBS52)
2.8 L 4JB1 diesel I4
2.8 L 4JB1-T turbodiesel I4
2.0 L G200 I4 (UBS13)
2.8 L LH7 V6
2.8 L LL2 V6

replace the oil sending switch on the motor. upon starting the engine this switch has a 3rd wire connected to the fuel pump
when oil pressure is running at its normarl psi the computer will shut that circuit off and then turn on the fuel pump relay

Yep you better check for fuel. add some to the air intake and see if it starts and dies. if it does the fuel pump might not be running as the ECC relay turns the system on and also the fuel pump relay then the incheria switch may may open and theres no power to the fuel pump

Check make sure all plugs are firing. Sounds like what my 93 Rodeo was doing-Idled okay but very rough when in gear. Turns out only 5 out of 6 plugs were firing due to a defective ignition module- 100 bucks later it works fine.

Hope this helps.

I just had the same problem, today, check the tan- lt green wire on the fuel relay that is located on the right fender, mine wasn't pushed in all the way, this wire shut down spark and fuel

Fuel problem, put in more gas or listen for fuel pump hum.

It should be on the side of the block 4ZE1 would indicate a 2.6L and yes a 1988 came with this engine with fuel injection.

Start by disconnecting the radio power wire, it may have been connected to your dashlite circuit. Now with a test lite tool check the available wires for the heavier wire, Using the test lite, this should have power when the ignition is on. reconnect your radio power wire to this one and your problem is solved.

what can be the problem it's some in the firing system