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Am a retired gal on my 3rd Jeep. Have 2009 Wrangler X. Having engine trouble. Jeep misfires and lurches violently when going over 50 mph. Seemed worse after after filling up. Thought i had gotten bad gas. Now in shop, am awaiting diagnosis. Any ideas? Jeep has 78,400 miles on it. Thanks, Pinefoxie
 

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Am a retired gal on my 3rd Jeep. Have 2009 Wrangler X. Having engine trouble. Jeep misfires and lurches violently when going over 50 mph. Seemed worse after after filling up. Thought i had gotten bad gas. Now in shop, am awaiting diagnosis. Any ideas? Jeep has 78,400 miles on it. Thanks, Pinefoxie
ya fill it w/ diesel on accident?(happens a lot and mostly to dudes!) probably not but definitely sounds fuel-path relative, possibly ignition related...did this just pop-up suddenly or progress towards the lurching over a span of time? have you checked plugs , plug boots and fuel filter + pressure? you've not a lot of detail for us to go on so i can only throw ideas out there.....any engine codes or let anyone work on it recently for ya? good luck & keep outcome posted
 

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My guess based on the described symptoms: plugged fuel filter.

Not sure what the service interval is on those (have not even looked yet) but 75k seems high for an original filter if it is still in place.

Depending on how badly it might be plugged, it may also bog down and go BWHAAAAAAAA when you mash the pedal to the floor.

A plugged exhaust can kind of act like this too
 

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Yup that is part of the exhaust. I have replaced plenty of melted down catalytic and monolithic converters. It was a great upsell when I did clutch jobs even before they were noticeably bad.
 

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^^^^Or Cats.^^^^^
I forgot about this - ^X2 - cats could certainly behave in that manner were one malfunctioning. I tend to lean towards it being the fuel-filter or other fuel delivery interruption if it's bucking and broncing like that ,enough to troubleshoot the delivery system first.....
 
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