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Unread 03-28-2013, 06:30 AM   #1
bayhunter
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1999 XJ Cherokee 
 
Join Date: Feb 2010
Location: nj
Posts: 42
Stalling and sputtering 99XJ

Tried numerous fixes and still same problem. In Oct. Jeep started sputtering on way home from 2 hr road trip. When i got home it stalled like when an old car used to run on. Mechanic replaced coil and loose vac hose. It has done this on and off till now. Parts replaced COIL, cps,tps, tuneup,both o2 sensors,fuel pressure is good. Mechanic thinks maybe loose wiring harness for computer. Can anyone point out something im missing? Dont wanna go out if city with. DOES THIS 2-4 TIMES A WEEK . sputters then dies and is hard to start. THEN CLEARS UP FOR A DAY OR TWO. nO CODES ARE THROWN.CPS and cam ps grounds to block are clean

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Unread 03-28-2013, 11:14 AM   #2
CJ7-Tim
Real Jeeps have dents.
 
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2000 XJ Cherokee 
 
Join Date: Apr 2002
Location: out in the garage - Minneapolis, Minnesota
Posts: 21,513
Look into #3, #4, and #5. The Jeep PCM is very picky about having correct voltage.

For 1996+ Jeeps, the OBD-II engine computer (ECU/PCM) re-boots, and the idle settings are deleted, when you: (1) let the battery run down by leaving the lights or radio on, (2) disconnect the battery for an extended period of time, (3) when the battery goes bad and needs replacing, (4) when the alternator is not properly charging the battery, (5) or when poor battery connections result in a voltage drop at the PCM or poor battery charging. Loose, corroded, or damaged battery cables or ground wires may also cause or contribute to the problem.

Your symptoms are: (1) having difficulties starting the engine without depressing the gas pedal, and (2) the engine will have a low idle and probably stall unless you keep your foot on the gas pedal. (3) The ECU will relearn the idle settings after a short period of driving and the engine will start and idle normally.

Begin with basic trouble shooting of the start and charge systems. Remove, clean, and firmly reconnect all the wires and cables to the battery, starter, and alternator. Look for corroded or damaged cables and replace them as needed. Do the same for the grounding wires from the battery and engine to the Cherokee's frame/body.

If the symptoms reoccur, you need to have your battery and/or the alternator load tested at a repair shop or auto parts store. This is usually a free service they offer to bring in potential customers. Even with low battery voltage, the engine will start, but the ECU can re-boot multiple times and a new battery may be required.
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Unread 03-28-2013, 11:23 AM   #3
bayhunter
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1999 XJ Cherokee 
 
Join Date: Feb 2010
Location: nj
Posts: 42
Sputtering 99 xj

Cleaned terminals and connections. will see if that helps. will stop to have tested at auto zone. thanks.
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Unread 03-31-2013, 08:51 AM   #4
bayhunter
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1999 XJ Cherokee 
 
Join Date: Feb 2010
Location: nj
Posts: 42
Battery terminals

Cleaned the terminals and have not had any problems over three days. Will need to give it at least a week to see if problem is fixed.
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