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'99 XJ hesitates and lunges whencold

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Old Oct 28, 2012 | 06:30 PM
  #16  
klump's Avatar
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Joined: Sep 2012
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From: South Bend, IN
Year: 1998
Model: Cherokee
Engine: 4.0
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Originally Posted by vr4operator
Yeah, thats what I'm saying. As I say, I don't buy into additives anymore than 95% of the crap at GNC. It just makes you feel better. but I've used Seafoam in the past and then found something just as good for half the price. Safe on filters, keeps the whole system clean, works wonders on carbon deposits (my '71 Vette LOVED it, she runs rich). Like I say, for $3.17 at Wal-Mart (just got 10 more for the winter, I have alot of vehicles), its great insurance. I'm gonna run a full tank thru and see if it fixes the issue, if not, then we'll go with plan B and get the sensor(s).

I did take the throttle body off and aprt and cleaned it. Holy jeez it was full of dirt and crap, especially the IAC area and IAC itself. I cleaned the IAC real good, but it may get replaced with the sensors, just to cover bases and cross a issue off the troubleshooting chart.

BTW, Advance Auto has the IAC for $72, not bad. Went to 3 boneyards today looking for a drivers side taillight and ALL the jeeps were missing the LEFT one. WTH? Advance had it new for $75. Needed it asap for inspection. Woulda rathered the $30 boneyard price tho, lol
ironically enough, thats the one i need and they too are ALL picked over. hahaha. and yea, if you can afford it id replace that too. its a moving part (that is important) that wears out like everything else.
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Old Oct 31, 2012 | 11:48 AM
  #17  
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From: Western Massachusetts
Year: 1999
Model: Cherokee
Engine: 6
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Originally Posted by klump
ironically enough, thats the one i need and they too are ALL picked over. hahaha. and yea, if you can afford it id replace that too. its a moving part (that is important) that wears out like everything else.
Yeah, bought one at Advance Auto. It was $70. Didn't fix my issue tho. Tried taking the O2 out and of course, its seized in there. Gonna get a torch and try that. I took the throttle position sensor out, since I'd cleaned and replaced damn near everything else, lol. It was gunked up pretty good. If an O2 does't fix this, I'm at a loss...
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Old Oct 31, 2012 | 11:51 AM
  #18  
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From: Western Massachusetts
Year: 1999
Model: Cherokee
Engine: 6
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Originally Posted by arorton
What year tail light?? I found my 97+ one on eBay for $28 or something like that
Needed one fast for inspection, just bought a new one at Advance Auto for $75. I was surprised they sold tail lights. Now I need a drivers side fog light down the road
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Old Nov 12, 2012 | 04:11 PM
  #19  
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From: Western Massachusetts
Year: 1999
Model: Cherokee
Engine: 6
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This vehicle is dragging me down...

Changed the coolant temp sensor, all the hoses, flushed it...and it still lunges and hesitates. Last thing I can think of will be the up stream O2 sensor.

Oh and BTW, who the f!@* designed the petcock? Idiots... so far, other than not being able to lick this problem, the XJ is pretty damned easy to work on.

Hey, does the same year Wrangler shared the inline 6?

Thanks, Butch
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