Engine studder

15

Asked by Dec 30, 2015 at 05:13 PM about the 2005 Jeep Liberty Limited

Question type: Maintenance & Repair

My mother's 2005 jeep liberty engine shakes. At
2000 rpm the car studders. Engine codes P0300
P0304 and P2311 any help to point me in the right
directions would be amazing. I don't want to just
replace the spark plugs and have the issue repeat.
So before I go spend money some advice would be
appriciated

4 Answers

20,815

repair the codes...does it still need a tune up...fuel filter..ect..

63,235

P0300 is random/multi-cylinder misfire. P0304 is misfire on cylinder number 4. P2311 is an ignition coil code. If you have over 100,000 miles on your Jeep you're due for a tune up. Try that first using champion original equipment type spark plugs. Chryslers don't like other types of plugs. The resistance value on the plug is different and can cause issues. As part of the tune up check the coil for cylinder 4. Make sure it's ok. HTH. -Jim

2 out of 2 people think this is helpful.
15

Just replaced spark plug on cylinder 4 issue is still present. How can I test the coil since it's a coil on plug system.

1 out of 1 people think this is helpful.
63,235

Visit your local auto parts store and ask for a spark tester. You want the kind where one end plugs onto the spark plug and the other plugs onto the boot that would normally go on the spark plug. In the center of the tester there's a light that will flash to let you know you have spark. HTH. -Jim

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