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  #61  
Old 11-28-2014, 06:39 PM
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Re: jeep surge idle

in response to everyones responses recently: yes i did spray it with throttle body cleaner. Before i even sprayed it, it was doing it before hand as well. If it wasn't, surging beforehand, i would have never sprayed it. Dealer reprogrammed it after cleaning it. How could i get a scan tool to tell me about the throttle body as you state frango?

p.s. Tested it all day today and its not surging again. Roads are dry and its not raining. Its making me start to think it has something to do with something getting wet when it rains causing the surging. Im eliminating temperature outside as being a culprit at this point.

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  #62  
Old 11-28-2014, 06:55 PM
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Re: jeep surge idle

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Originally Posted by Jeff1119 View Post
How could i get a scan tool to tell me about the throttle body as you state frango?
Im not familiar with this new throttle body design, but i imagine that a scanner with live data can show info from the throttle actuator and throttle position sensor.
Now that the problem seems to be moisture related, you maybe can spray some water mist around on the throttle body and any visible connector, to see if the problem can be duplicated that way.
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  #63  
Old 11-28-2014, 09:50 PM
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Re: jeep surge idle

Quote:
Originally Posted by Frango100 View Post
Im not familiar with this new throttle body design, but i imagine that a scanner with live data can show info from the throttle actuator and throttle position sensor.
Now that the problem seems to be moisture related, you maybe can spray some water mist around on the throttle body and any visible connector, to see if the problem can be duplicated that way.
Well something strange just happened. Was idling fine and decided to turn the heat on. Put it in defrost mode and swapped it into park after. About a minute late the idle jumps up to about 750rpm and stays there. I put it into drive and stop and it drops down to an idle of 650rpm. Back into park and it's back up to 750rpm. Was stuck like that even with the heat off. Turned the jeep off and back on and its back to normal again even with heat on again. Ideas?
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  #64  
Old 11-29-2014, 09:51 AM
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Quote:
Originally Posted by Jeff1119 View Post

Well something strange just happened. Was idling fine and decided to turn the heat on. Put it in defrost mode and swapped it into park after. About a minute late the idle jumps up to about 750rpm and stays there. I put it into drive and stop and it drops down to an idle of 650rpm. Back into park and it's back up to 750rpm. Was stuck like that even with the heat off. Turned the jeep off and back on and its back to normal again even with heat on again. Ideas?
That is weird. Never heard of turning on the heat doing that... hmmm maybe there is more going on then we realize
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  #65  
Old 11-29-2014, 10:02 AM
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Re: jeep surge idle

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Originally Posted by Strongjeff View Post
That is weird. Never heard of turning on the heat doing that... hmmm maybe there is more going on then we realize
I'm gonna see if it ever does it again and keep you updated. Right now it hasent. Someone over on jeep forum said the throttle body probably got stuck for a second. Maybe my throttle body is starting to go bad?
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  #66  
Old 11-30-2014, 05:07 PM
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Re: jeep surge idle

Update: Well guys we are now on day 3 of no idle surge. It hasent rained since Wednesday but what I did today is spray the jeep with a hose while its idling in drive with the emergency brake on. Sprayed the engine (hood closed obviously) and the bottom of the jeep. Had my phone recording inside the whole time. Went back to check the video and not a single surge. I might be ruling out water as a culprit but not sure yet because I actually have to drive around in the rain to see if it will do it again. Suppose to rain Wednesday so il see then. Maybe I did get bad gas though and it's about all gone. In the meantime, I uploaded a video to YouTube of what I shot today. It's only a minute and 30 secs long but in that time frame it would have surged. Check it out

Idle - YouTube
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  #67  
Old 12-01-2014, 02:50 PM
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Re: jeep surge idle

Can the defrost mode have something to do with it? Not sure on the WK, but on the WJ, when defrost is selected, also the AC compressor will be switched on automatically and on the WJ the IAC (idle air control) will increase a bit the idle speed to compensate for the AC compressor drag.
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  #68  
Old 12-01-2014, 04:44 PM
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Re: jeep surge idle

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Originally Posted by Frango100 View Post
Can the defrost mode have something to do with it? Not sure on the WK, but on the WJ, when defrost is selected, also the AC compressor will be switched on automatically and on the WJ the IAC (idle air control) will increase a bit the idle speed to compensate for the AC compressor drag.
I doubt it, if i have the defrost mode on it actually idles better. No surge with defrost on.
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  #69  
Old 12-01-2014, 07:03 PM
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Re: jeep surge idle

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Originally Posted by Jeff1119 View Post
I doubt it, if i have the defrost mode on it actually idles better. No surge with defrost on.
You replied on the 29th saying that you had put it in defrost mode and that a minute later the idle changed to 750.
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  #70  
Old 12-01-2014, 07:09 PM
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Re: jeep surge idle

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Originally Posted by Frango100 View Post
You replied on the 29th saying that you had put it in defrost mode and that a minute later the idle changed to 750.
Yeah I know happened that one time. Been trying to recreat that problem over the past few days to no avail. It was really strange how that happened
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  #71  
Old 12-02-2014, 03:58 PM
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Re: jeep surge idle

Update: day 5 and jeep surged today. Wanna know whats funny? Roads are wet and it was raining. This has brought me to believe that this has got to do something with rain. Yesterday it was raining but it did not surge. However after excessive testing, i have figured out i need to be driving at least 2 hours or longer ( that can include parking the jeep with the engine off and then getting back in a half hour later and driving some more) for it to surge. I drove for 2 hours the other day on a dry day and no surge. So I'm getting real close to pinpointing the problem on the days which it occurs. Im bringing rain back as the culprit. How or what is getting wet within that 2 hour time frame that causes this is beyond me. Im gonna have to wait for another dry day to make sure that rain is in fact the issue here. Also some more info, the surge always started when in that 2 hour time frame, i had the heat on and then turned it off, which continues the surge later on.

I know this is getting out of hand now with all this testing and no results but I'm sure that if i can go a week of no surge, than it rains and it surges, than no rain and it doesn't surge for another 4 days, than rain and it surges, is making me believe this is it. I wouldn't exactly know how to figure out what might be getting wet for this to happen or if fuel is even the issue (doubting it at this point) but in the next week I'm most likely gonna just give up on it. Its really wouldn't be worth the time and money to put into a problem which is beyond anyones fix. Im only posting this info for any future viewers who might experience this issue. Once again, if anyone has any solutions, feel free to chime in. il talk to you guys soon.
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  #72  
Old 12-05-2014, 02:11 AM
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Re: jeep surge idle

Does anyone know if theres any important wires by the jeeps wheels that could possibly get wet when the tires are wet such as driving around on wet roads? Just took a 5 hour drive tonight back and forth to jersey to go out to dinner and not a single surge all night. All because the roads were dry

Its not suppose to rain tomorrow but i wanna look under the jeep and to see what could possibly be getting wet. I was hoping someone could give me some pointers on where to look. I really want to get to the bottom of this now that i know wet roads cause the surge which i guess means when it snows it will surge all the time wanna get to the bottom of this before that happens lol
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