WTF! i just changed spark plugs and now it idles really rough - Page 2 -
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Go Back > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > WTF! i just changed spark plugs and now it idles really rough

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Unread 06-02-2009, 10:04 PM   #16
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2001 WJ 
Join Date: Sep 2007
Location: Los Angeles, CA
Posts: 1,410
okay another UPDATE:

i finally got around to replacing the TPS with a new one. i also left the battery disconnected for about an hour to clear previous settings. the jeep started up fine, idle seemed okay, but definitely a noticable lack of power AND what sounded like misfiring. i continued to take it for a test drive to let the engine warm up and get the speed up. after a while on the freeway, the CEL comes on -- P0302: misfire cylinder #2

also, keep in mind, i discovered a crack in my exhaust manifold/header, so yes i'm also dealing with an exhaust leak which is very loud

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