cherokee engine sputtering
07-13-2011, 05:04 PM
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Model: Cherokee
cherokee engine sputtering
Hi I recently got a engine sputtering problem, It sputters when idleing,also while driving. It sputters for a second then it runs fine again, but after about 10-20 secs it sputters again and it continues to do so intill im done driving. Anyone have any ides on what i can do 
07-13-2011, 05:13 PM
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Year: 1987
Model: Cherokee
Engine: 4.0 liter RENIX I-6, DIY Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator
I recommend checking fuel pressure at the test port on the fuel injection rail. At idle 96 and older 4.0 should be 31+-1psi and 97 and newer should be 49+-5psi. If your Jeep is even 1psi lower than spec. your Fuel pump is going bad. If the fuel pressure is good I would read out your (CPS) Crank Position Sensor. If that checks good I start checking ignition componants I.E. clean and regap or change your sparkplugs, clean or replace the distributor cap and rotor. Read out and if need be replace sparkplug wires.
07-13-2011, 05:45 PM
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sputtering jeep
Thanx for your info,I replaced the plugs,wires,rotor and cap. Also did a fuel pressure test everything was good.I havent check my CPS yet. Do you know what the spec is for that
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