Bad Fuel pressure regulator?
#1
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Model: Cherokee
Bad Fuel pressure regulator?
My jeep wont start when its cold but once its been running at operating temp it will start but then once it cools down its a no go. I replaced the coolant temp sensor and the fuel filter then I checked my fuel pressure and it was at 40? I didn't think it was supposed to be that high but Im not sure I just want my sexj to run without using ether. Any help or bit of info you guys can give me would be great thanks guys!
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Year: 91
Model: Cherokee
Engine: 4.0
My jeep wont start when its cold but once its been running at operating temp it will start but then once it cools down its a no go. I replaced the coolant temp sensor and the fuel filter then I checked my fuel pressure and it was at 40? I didn't think it was supposed to be that high but Im not sure I just want my sexj to run without using ether. Any help or bit of info you guys can give me would be great thanks guys!
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
Always post the year of your XJ when you start a thread.
By your name, if this is a 93, you should have 31 psi at idle. Then disconnect the vacuum line leading to the fuel pressure regulator and the pressure should jump to approximately 39 psi.
Be sure that the vacuum line leading to the regulator is pulling good vacuum and is not wet with raw fuel, which would mean that you have a ruptured diaphragm in the regulator.
By your name, if this is a 93, you should have 31 psi at idle. Then disconnect the vacuum line leading to the fuel pressure regulator and the pressure should jump to approximately 39 psi.
Be sure that the vacuum line leading to the regulator is pulling good vacuum and is not wet with raw fuel, which would mean that you have a ruptured diaphragm in the regulator.
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