Codes; PO171 & PO300 on 01 XJ 4.0
06-08-2016, 02:45 PM
#1
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Model: Cherokee
Codes; PO171 & PO300 on 01 XJ 4.0
Hard starting, trouble staying on. It sounded like a tune up was needed, so oil, filter, plugs and still the same. So new ignition coil and fuel pressure test (20 psi) and still the same!!!!! Any ideas?
06-08-2016, 04:02 PM
#2
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Year: 1999
Model: Cherokee
Engine: 4.0
20 psi is death warmed over.
Replace fuel pump module with a Bosch or Carter fuel pump module assembly.
Cheers
06-08-2016, 06:55 PM
#3
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Year: 1999
Model: Cherokee
Engine: 4.0
Listen to CCKen. He has this one pegged. Fuel pressure is less than half what it should be. You must start here.
Do not install an Airtex fuel pump. Do a simple Google search if you want to find out why. They have a bit of a reliability problem with the pumps that they manufacture for the Jeep XJ.
Do not install an Airtex fuel pump. Do a simple Google search if you want to find out why. They have a bit of a reliability problem with the pumps that they manufacture for the Jeep XJ.
Last edited by tjwalker; 06-09-2016 at 07:26 AM.
06-09-2016, 07:03 AM
#4
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Year: 1999
Model: Cherokee
Engine: 4.0
Listen to CCKen. He has this one pegged. Fuel pressure is half what it should be. You must start here.
Do not install an Airtex fuel pump. Do a simple Google search if you want to find out why. They have a bit of a reliability problem with the pumps the mfg. for the Jeep XJ.
Do not install an Airtex fuel pump. Do a simple Google search if you want to find out why. They have a bit of a reliability problem with the pumps the mfg. for the Jeep XJ.
Airtex fuel pumps have been repackaged under a different brand names so watch out.
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