sputter problem - JeepForum.com

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post #1 of 4 Old 05-06-2015, 11:33 AM Thread Starter
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sputter problem

Jeep starts great, good in idle. Once in drive first five mins it feels like it wants to stall. At stop lights it will stall. Starts fine back up then I don't have a problem for rest of the day anymore, any ideas!!?? 207000 miles on it, and good compression. New spark plugs, water pump, thermostat and catalytic converter

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post #2 of 4 Old 05-06-2015, 04:35 PM
Jonny Jeep
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1997 TJ Wrangler 
Join Date: Feb 2007
Location: Manchester
Posts: 5,498

I'm guessing it's a 97-99 model. In which case it may have a bad heater in the upstream O2 sensor. If the O2 sensor is disconnected and the engine runs fine like that (though you may get a code and CEL) the sensor is most likely the cause of the problem, and should be replaced using an NTK sensor preferably, and avoiding Bosch.

If you have a look at where it says 1997 TJ Wrangler on the left you can see my vehicle profile. It will help if you fill in yours with as much detail as you can. There are many changes over the years and without relevant information it can be very difficult to give accurate answers.

Online factory service manuals and parts lists - http://www.jeep4x4center.com/knowledge-base/index.htm
If it doesn't work properly, look for the service manual link at the bottom of the page.
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post #3 of 4 Old 05-06-2015, 05:54 PM Thread Starter
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Thank you, I did change the catalytic converter but did not change the sensors as I should of
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post #4 of 4 Old 05-07-2015, 02:23 PM Thread Starter
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It ended up being both upstream sensors once again thank you
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