99 Jeep Grand Cherokee Laredo V8 knocks when cold while driving 25-45...

shortnsweet

New Member
...MPH, but fine when warm? have used Risline and Lucas, but they didn't help much or it was temporary. It's a loud knock or thump that sounds like popcorn until it's warm... then it just goes away until I go 65 or so, then there is the occasional knock
I have warmed her up, driven slow to warm her up, if it's really cold it still does it. oh and it has 91K miles
 
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