Question about 1998 Jeep Cherokee
You do not have a carburetor you have fuel injection. You also have electronic engine controls and a diagnostics system that monitors them.
Fuel and spark advance are controlled by that system.
I first recommend that you have a code scan done to determine if the fault has registered any codes (most larger auto parts stores do that free).
A fuel pump that is beginning to fail can sometimes give similar symptoms as you reported, as can a partially plugged filter. Neither will register a code. Before replacing a pump, verify that it has a good ground and voltage going to it. If not check the pump relay and auto shutdown relay.
No one can give you an exact answer to your problem because a responsible answer can only be established by proper testing.
Both haynes and chilton manuals have good test procedures you can do using a digital multi-meter. Fuel pressure tests should be done using a fuel pressure gauge made for that purpose. The gauge is a bit expensive and only has that one specific use. Therefore you may have it in your tool box for a long time before you need it again. You can have a shop check the pressure often for less than the price of the gauge, or you may be able to rent one from a parts house.
Aside from a simple filter replacement, test first, buy parts later...it will save you money and grief.
If you have a question about any of your findings just ask and someone will help you!!!
Posted on May 03, 2010
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Posted on Jan 02, 2017
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