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Old 04-09-2013, 02:50 PM
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Please help!! Rough idle,stall, piston mosfire

Hi guys. I have a 2007 4.7 v8 grand Cherokee that has been giving me a big issue. I hooked my jeep up to a scan tool and I get the piston misfire code. When cold my engine runs fine but once it gets hot it starts to idle really rough. Sometimes is goes down to 4-500 rpm and eventually stalls. Also I'll be randomly driving and my jeep starts to shutter very violently and I lose power and the engine light will flicker on and off and eventually stay solid.. I just got the engine replaced an I have about 5,000 on the new engine and 94000 on everything else. I know it's not the spark plugs, and I checked for a vaccume leak and it doesn't seem to have one. Also somtimes when I start my car there is a loud metal clinking sound. It's kind of hard to describe but it sounds like there's a piece of metal in the exhaust or somthing. please if anyone could help of have had this problem before please help.
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Old 04-09-2013, 03:03 PM
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Also the misfire doesn't happen every time I drive but it happens often. Same with the rough idle
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Old 04-10-2013, 04:19 PM
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Anybody? Somebody help????
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