My Grand Cherokee is idling rough – could it be spark plugs?
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My Grand Cherokee is idling rough – could it be spark plugs?
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10-09-2026, 07:22 AM
Genuine or OEM-spec plugs matter on these engines, the Pentastar is picky about heat range and gap. Ask for the brand and part number on the invoice and check it against the manual. Also ask if they use a torque wrench, since overtightening in aluminium heads causes expensive thread damage.
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My Grand Cherokee is idling rough – could it be spark plugs? - by adamzampa - 07-21-2026, 06:00 AM
RE: My Grand Cherokee is idling rough – could it be spark plugs? - by hertawintle - 10-09-2026, 07:20 AM
RE: My Grand Cherokee is idling rough – could it be spark plugs? - by hertrudewiseman - 10-09-2026, 07:20 AM
RE: My Grand Cherokee is idling rough – could it be spark plugs? - by hesperwish - 10-09-2026, 07:20 AM
RE: My Grand Cherokee is idling rough – could it be spark plugs? - by hesterwishart - 10-09-2026, 07:22 AM
RE: My Grand Cherokee is idling rough – could it be spark plugs? - by hettawithers - 10-09-2026, 07:22 AM
RE: My Grand Cherokee is idling rough – could it be spark plugs? - by youngdragoon - 10-18-2026, 02:16 PM
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