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Old 06-22-2014, 08:48 PM
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Join Date: Jun 2014
Location: Spruce Pine, North Carolina
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Exclamation P0171 code need some help.

Hey guys first time poster here. My 98 TJ is giving me some trouble. I was driving today when I noticed a surge in power above 2000 rpm. It would jerk and lug really bad above 2000 and when pulling hills. I used my bluetooth scantool and it read P0171. I have already replaced the tps and iac, plus I cleaned the throttle body. I have tuned it up completely when I bought it 2 months ago. I was getting CEL on the tps and it did go off when I unplugged the clock spring cause I had put two new OEM's in it to no avail. After I unplugged the clock spring it ran fine for about a month then started doing this today. I do smell gas when I start it up in the morning to go to work. I did try unplugging the upstream o2 sensor to see if that would help but it ran much worse. Any help would be great guys I need my Jeep to get to work.

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Old 06-23-2014, 08:11 AM   #2
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Try replacing the spark plugs and o2 censor

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Old 06-23-2014, 11:53 PM
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Thanks I'll give it a go.
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