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Discussion Starter #1
My 1990 jeep cherokee XJ while driving at 30 - 45 and gas is keeped constant is jerking like it is towing a trailer be hind it. If you push the gas it hauls and is smooth, or when you let go of the gas it slows down a little. I dont know if it is because of this air sucking sound from the back of the engine or what. May be you guys will know.
 

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Discussion Starter #3
The air noise sounds like some thing is sucking air. While at an idle the engine will run good, then that air sucking sound starts and the idle rpm drops to about 500 rpm, then it will stop and idle will go back to about 900 - 1000 rpm and the engine sounds good. I was thinking that could be why at 30 - 45 it does that but I dont know.
 
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