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Hey guys I own a 2010 jk with 53000km on it.Lately everytime I start it it hesitates and shakes for a few seconds then idles back to normal.I plugged my obd tool in got nothing.All liquids are nice and level and air filter is new, any ideas where to look?
 

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Check for a leaky injector. Use a fuel pressure gauge to see if the pressure bleeds off quickly after turning the engine off. If your obd tool lets you do an injector balance test run that.
 

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I had to replace the spark plugs in my 2007 at 25K miles to fix a rough idle issue. did it at start up. Occasionally coming to a stop the RPM's would drop to around 300-400 and it would stumble. Not die but engine would shake a bit then come back up to 800.

I used E3 plugs, smoothed it right out and picked up a little low end power.
Never had a problem afterward.

Factory gap was too big on 3 cylinders, 2 were ok, 1 was too small. All were showing signs of slight wear on the electrode.
None of the boots had die-electric grease in them, packed them all before install.

Dealer said the factory plugs are good for 60,000+ miles. It's BS.
 
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