Jeep 4.7L low idle in drive stopped at light - JeepForum.com

 
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post #1 of 1 Old 04-24-2012, 04:21 PM Thread Starter
shawnsbruno
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1999 WJ 
 
Join Date: Apr 2012
Location: Altoona
Posts: 4
Jeep 4.7L low idle in drive stopped at light

Hello Jeepsters my 99 grand cherokee limited when at operating temperature stopped in drive the idle goes from 750rpm to 400rpm or lower like its going to stall. Tried this in reverse and the rpm stays at 750. Replaced fuel filter, AIC motor, cleaned throttle body, oem spark plugs. Put on snapon computer, misfire #6 so I replaced coil. No more misfires, still the same problem. Could not find no more bad readings. Maybe the TPC? Any suggestions!!! Thanks

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4.7 liter , rough idle , rpm , stalling at stop

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