Question about Jeep Cherokee
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Posted on Jan 02, 2017
I apologize for not being able to provide a diagram, and it's been a while since I've replaced a fuel pump in a Jeep like yours, however the fuel pump for that vehicle is located within the fuel tank. You will typically disconnect power from the battery,relieve the pressure from the fuel rail to the injectors. In most cases the test port on the fuel rail has a schrader valve "valve core" like a tire valve, which utilizing a rag to absorb excess fuel you can depress to relieve pressure. You will then have to detach the fuel filler tube and vent tube at the filler neck. With a floor jack supporting the tank ,there should be a couple of bolts holding either two straps around the tank or a large cover that covers and supports the tank itself ,that will need removal. Once you have removed these and you should be able to access the top of the tank. Bear in mind you don't put the fuel pump/sending unit wiring harness or the fuel and vent tubing under too much strain as you lower the tank. you should have enough room to disconnect this wiring and fuel tubing. the tubing will probably have a quick disconnect setup where it attaches to the pump assembly. Once you have the tank on the ground take a suitable (non sparking drift and hammer) to tap the retaining ring that holds the pump in the tank, around the openig to release it. The pump assembly will be spring loaded and the top may pop up out of the tank. Just be sure to protect yourself from any fuel that might spray up. To reinstall can be a slight chore sometimes, as the assembly is spring loaded. It usually goes in with just a slight amount of effort though. Remember to replace the fuel sock on the pump and o-ring seal around the top of the opening. You can purchase just the electric pump, but I'd recommend replacing the whole fuel pump assembly. It will cost more in parts, but longer part warranty and lesser chance of further damaging the assembly are the benefits. Naturally installation is the reverse of removal. I'd recommend a new fuel filter as well, or shortly thereafter. Chrysler factory replacement units recommend draining all the old fuel from the tank and replacing with new fuel (never done that, and with the price of gas, probably won't start) I have never seen an adverse effect from not doing so. I hope this posting has helped.
Posted on Nov 13, 2008
SOURCE: 90 jeep starting problem
Check the crank position sensor. I had the same problem in a 1989 cherokee 4.0, and the solution was simply to acomodate the sensor wiring. No replace was necesary
Posted on Jun 11, 2009
If you intend to keep the vehicle long term, I would suggest you invest in a Haynes Manual, That is worth its weight in gold, for this and any other project..
Posted on Aug 29, 2009
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