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2004 Jeep Grand Cherokee Laredo rough idling after replacing Spark Plugs
I have a 2004 Jeep Grand Cherokee Laredo 4.0 straight 6 that I just replaced the spark plugs in yesterday. After replacing the spark plugs, the jeep idles rough. the RPM isn't bouncing and in park it is around 650 to 700 RPM. But, it is now idling rough. If in neutral, it seems ok and when driving there is no roughness, but when I put it in reverse, or I am at a stop while in drive the jeep starts to shake real bad. I watch the RPM needle and it isn't bouncing or anything, but just feels like it is going to stall, but doesn't.
Also, We replaced the TPS about a month ago and the jeep was running fine. Only since changing the spark plugs has this issue come into the picture.
Thanks in advance.