91 Jeep Cherokee Laredo fuel pump not working?
I just replaced the pump-and it worked for two days-I thought it was faulty so I put a new one in again and still no power to the pump. The relay is not bad because I exchanged it with other relays that are working and it still does not work. Does anyone know how to trace the wiring back or what to use to test to see if power is getting to the wires??? I have replaced the fuel filter and the screen that filters before the pump. There is no power going to the filter because there is a clear line at least to the fuel filter and when i disconnect the line, there is no resulting fuel in the line-thus it is not pressurized at all. No pressure is getting to the pressure release valve under the hood-I just don't know how to use a multimeter and what the readings need to be...
Jeep - 2 Answers
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1 :
use a multi meter.
2 :
Your Jeep has electronic fuel injection. The pump will not run all the time. You need to have a fuel pressure tester to check the pressure at the fuel rail. You could have a clogged fuel line which would cause the pump to pressurize the system, then turn off. A tester would indicate this possibility. Have you changed the fuel filter? You have a steel fuel tank, could it have a lot of rust in it and getting caught up in the pump?
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