Stutter when accelerating. Fixed thanks to you guys. - Jeep Patriot Forums
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post #1 of 6 (permalink) Old 06-16-2015, 05:33 PM Thread Starter
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Stutter when accelerating. Fixed thanks to you guys.

So I was having an issue when I would accelerate I could occasionally feel a hiccup or slight stutter. Was happening more often on hills. At first I thought it was a normal CVT thing but I decided to search on here. I saw people saying changing spark plugs fixed or at the very least greatly helped this issue.
I stopped and got new plugs they were pre gapped to .043. Which is what it should be at.

I remove old plug and checked gap. Was at .063
I assume that is pretty bad. Replaced them and now the problem at least so far seems to be fixed. Ill update again after driving it for a few days. But just wanted to thanks the people here for the help. The jeep is a 2012 latitude with 52000 miles. I doubt the plugs were ever changed previously.
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post #2 of 6 (permalink) Old 06-16-2015, 09:50 PM
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...2012 latitude with 52000 miles...
Yeah that's way past the service interval. Mine were done at 30k miles, and are supposed to be done at every 30k mile interval since. You were almost twice overdue XD

http://shopping.automaxok.com/oklaho...ice-schedules/

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post #3 of 6 (permalink) Old 06-17-2015, 06:57 AM
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Glad the forum could help you out! I had this issue last year. New plugs and a new air filter solved it.

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post #4 of 6 (permalink) Old 07-18-2016, 11:46 AM Thread Starter
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The problem has returned, i have put over 20k miles on it in the last year. Could the plugs be bad again that fast?


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post #5 of 6 (permalink) Old 07-18-2016, 08:28 PM
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The problem has returned, i have put over 20k miles on it in the last year. Could the plugs be bad again that fast?

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I've had a similar stuttering problem with my Patriot off & on for the last 100,000 miles or so. There are good people who disagree with me but here's what I think I'm on to. I'm copying this from another recent post so anyone reading this who thinks they've read it before, you probably have.

I have no problem at idle or starting from a standing stop, but I have had what amounts to a break in the action when increasing speed (an on-ramp or toll gate) or when approaching a hill and the engine begins to rev higher for more power (I have the CVT). At first I thought the transmission was slipping -- right in the middle of the acceleration pattern there was a stagger and then it would catch again and continue accelerating. If it was a long hill it might do it again.

I think its related to better tires or oversize tires on the front and well-worn or undersized tires on the rear. My guess is that the difference in tire size is confusing the ECM. I just posted in yet another thread that this spring I took off the snow tires and put on an old set of summer tires; all the tires were worn, but the rear tires especially so. The stagger was back! It had run fine all winter and here it was nicer weather, so I ruled out the cold. I considered changing out my spark plugs prematurely, but I've coped with the stagger and as the front tires have worn down the stagger has diminished. A few days ago I was entering an on-ramp on a grade and thought "Hey, this is the perfect place for it to stagger, but its not staggering." I realized I haven't felt that stagger for the last couple thousand miles (month of driving). Since I'm just using up this old set of tires I'm seriously considering replacing two of the tires with new and they'll go on the front. I bet my stagger will be back. Next step will be to change the plugs and see if the stagger persists (I bet it will). If it does persist I've tested my theory to my satisfaction. If it goes away all bets are off.

One final note, there is someone else on the forum named Joriss who has a thread going on this subject. I don't think he ever arrived at a conclusion but you can research his postings.
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post #6 of 6 (permalink) Old 07-19-2016, 12:35 PM Thread Starter
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I will admit my tires are not perfect. I got them all at the same time and the front are a bit more worn then the rear. The thing for me that almost rules out the tires is if the ecu was causing this because of something it should be throwing a code. Because if the ecu is doing it then it would know it was and should be able to at least throw up an error. I will say that the spark plug fix worked great for me until this month. So the new plugs made a difference for a year. I'm going to pull them today to check for any issues.


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