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  #109  
Old 01-05-2015, 09:54 AM
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Re: jeep surge idle

Some research only showed 6 plugs on the 3.7L. For the newer models there are indeed only 3 coils in total on the drivers side head which connect to their respective plugs, but separately there runs a plug wire from each coil to the passenger side head. So it fires two plugs at a time, from which one is waisted.

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  #110  
Old 01-05-2015, 10:36 AM
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Re: jeep surge idle

To everyone: the picture below is what my 3 coils on the driver side look like on my 3.7. Spark plug wires attach to the coil as you can see and run to the passenger side. The roads are dry today and drove around for an hour (which is about the time it takes to get it to stop surging on a dry road) and its back to normal. So now it's good till the next time it rains or the roads get wet again, whatever. Whatever was wet dryed out after drying around. Could very well be the spark plug wires I suppose.
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  #111  
Old 01-05-2015, 12:32 PM
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Re: jeep surge idle

Let us know if the new spark plug wires will solve the problem. The wires are known to dry out over time and get moisture in the cracks, which can allow a path for the high voltage to flow away.
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  #112  
Old 01-05-2015, 12:47 PM
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Re: jeep surge idle

Quote:
Originally Posted by Frango100 View Post
Let us know if the new spark plug wires will solve the problem. The wires are known to dry out over time and get moisture in the cracks, which can allow a path for the high voltage to flow away.
True have read about this. And since the roads are dry, no more moisture is flying up into the engine and getting into any cracks in the plugs, which I assume dries it out. Well the new plugs come in Wednesday but it's not suppose to rain till sometime next week. So il have to wait till then for an update. Hope this is the fix though, getting sick of this
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  #113  
Old 01-05-2015, 03:47 PM
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Quote:
Originally Posted by Frango100 View Post
Some research only showed 6 plugs on the 3.7L. For the newer models there are indeed only 3 coils in total on the drivers side head which connect to their respective plugs, but separately there runs a plug wire from each coil to the passenger side head. So it fires two plugs at a time, from which one is waisted.
Dont tell me to do some research. I was pissed and tired when i posted that. Or did you forget i drive a 3.7? All 3.7s have 6 coils. My o8 has 6. A 2002 has 6 and 2010 has 6
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  #114  
Old 01-05-2015, 04:29 PM
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Re: jeep surge idle

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Originally Posted by Strongjeff View Post
Dont tell me to do some research. I was pissed and tired when i posted that. Or did you forget i drive a 3.7? All 3.7s have 6 coils. My o8 has 6. A 2002 has 6 and 2010 has 6
Sorry to tell you that you are misinformed then. I didnīt tell you to do some research, i donīt know the 3.7L, so I did some research. And the 2010 and on models have only 3 coils on the drivers side head for 1, 3 and 5 plugs, with wires from those coils to the passengers side head for 2, 4 and 6 plugs.
We learn every day a bit more.
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  #115  
Old 01-05-2015, 04:42 PM
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Re: jeep surge idle

Quote:
Originally Posted by Frango100 View Post
Sorry to tell you that you are misinformed then. I didnīt tell you to do some research, i donīt know the 3.7L, so I did some research. And the 2010 and on models have only 3 coils on the drivers side head for 1, 3 and 5 plugs, with wires from those coils to the passengers side head for 2, 4 and 6 plugs.
We learn every day a bit more.
Actually my 09 has the 3 coil set up so I believe it's the 2009 and on models lol
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  #116  
Old 01-05-2015, 04:52 PM
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Re: jeep surge idle

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Originally Posted by Jeff1119 View Post
Actually my 09 has the 3 coil set up so I believe it's the 2009 and on models lol
Yes, its indeed 2009 and up
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  #117  
Old 01-08-2015, 10:26 AM
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Re: jeep surge idle

Update: idle is much better at its normal 600rpm instead of that 550rpm I was getting last time after putting in a brand new throttle body today. Guess I screwed the old one up spraying it down. Not sure if the surging is gone because the roads aren't wet but I got new plug wires in too so we'll see next time it rains. At least one issue is resolved though lol. Lesson learned.
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  #118  
Old 01-08-2015, 11:51 AM
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Re: jeep surge idle

What the inside looks like of the old one in case anyone cares lol. Guess the spray hit that logic board.
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  #119  
Old 01-08-2015, 03:06 PM
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Re: jeep surge idle

There should be some potentiometer for the feedback of the throttle position, or it uses a stepper motor to set the throttle and knows the position counting the steps. Either way, all that plastic stuff doesnīt look to be made for a long life.
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  #120  
Old 01-08-2015, 03:17 PM
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Re: jeep surge idle

Quote:
Originally Posted by Frango100 View Post
There should be some potentiometer for the feedback of the throttle position, or it uses a stepper motor to set the throttle and knows the position counting the steps. Either way, all that plastic stuff doesnīt look to be made for a long life.
Guess not. Either way, that throttle body spray did something to my old one and my only guess is it got on that logic board because the rest is just gears and a spring. Not sure if the surge is gone. Jeep is getting inspected now so mechanic is looking for an shorts in any wires and is doing his own water test to see if he can't recreat the problem. Got the new plug wires on too so guess we'll see. Again, not sure if it will still surge since I got a new tb and plug wires on and it hasn't rained yet, but guess we'll find out in a week when it does.
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