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  #37  
Old 11-24-2014, 12:49 AM
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Originally Posted by Jeff1119 View Post
Haven't been on here in a few days to update. Temperature has been in the 50s to 60s range and jeep has not surged once. In fact, it hasn't surged for a whole week since last Monday. On Tuesday I replaced the camshaft sensor and ever since doing that, there hasn't been a surge so I'm 98% sure that was what was causing the surging issue. Changed the crankshaft sensor and iat sensor in good will, but that camshaft sensor seemed to have done the trick. Again not giving my hopes up but if it hasn't done it for a whole week (and I've tested the idle numerous times throughout the week) then I think it might be safe to say problem solved

Let me know how it goes with yours boomer
Thats good! The real test will come when it dips below 40. Thats good tho. I got new cam n crank sensors chillin at home as a prevention measure. Got almost 69k on mine so the originals are about due

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  #38  
Old 11-24-2014, 03:45 PM
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Re: jeep surge idle

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Originally Posted by Strongjeff View Post
Thats good! The real test will come when it dips below 40. Thats good tho. I got new cam n crank sensors chillin at home as a prevention measure. Got almost 69k on mine so the originals are about due
True. I mean it's hasent gotten that cold yet so we'll see. Today it went up to 75 here in New York which is probably the hottest it will be till next spring. Went to test the idle again and no surging so I'm now 100% confident that the problem is resolved and the camshaft was the issue. Usually in cold weather it would idle good, hot weather was the only problem. You should replace your sensors soon otherwise you might have an issue like I did. Anyways, wanted to say thanks for your help!
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  #39  
Old 11-24-2014, 04:09 PM
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Can you direct me to cam and crankshaft sensors please?
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  #40  
Old 11-24-2014, 04:19 PM
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Re: jeep surge idle

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Originally Posted by Strongjeff View Post
Cam and crank sensors must be changed together as they must be in sync with each other.
Eventhough camshaft and crankshaft sensor signals are used together for fuel and ignition timing, i have never red any requirement to change both at the same time when one has failed. You could do it for a safe feeling, because both sensors have the same age and maybe the other will start failing soon as well, but there is no reason for it due to sync reasons. Both sensors are a hall effect type sensor, which uses a target wheel behind it to generate pulses. Changing or not both sensors together, will do nothing to synchronisation. The synchronisation is coming from the target wheels, which have notches, differently spaced over the circumference of the wheel. With the different spacing of the notches, the PCM will know exactly the position of the camshaft or the crankshaft and it knows which cylinder should get fuel at the right timing and spark at the right timing.
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  #41  
Old 11-24-2014, 05:46 PM
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Originally Posted by Boomer914 View Post
Can you direct me to cam and crankshaft sensors please?
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  #42  
Old 11-24-2014, 07:46 PM
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I ment the location In the vehicle lol
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  #43  
Old 11-24-2014, 08:53 PM
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Originally Posted by Boomer914 View Post
I ment the location In the vehicle lol
If i remember right, the cam sensor is on the right head towards the front. An the crank sensor is around the crank damper....tho i forget which side
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  #44  
Old 11-24-2014, 09:07 PM
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Re: jeep surge idle

Crank sensor sits on the right lower aft side of the cylinder block. (as seen from drivers position)
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  #45  
Old 11-24-2014, 09:46 PM
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Originally Posted by Frango100 View Post
Crank sensor sits on the right lower aft side of the cylinder block. (as seen from drivers position)
Good catch bro. Im still overseas in korea. Been here almost a full year so thats why i said if i remember right.
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Old 11-24-2014, 10:44 PM
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Re: jeep surge idle

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Originally Posted by Boomer914 View Post
I ment the location In the vehicle lol

il take a picture tomorrow of both locations and post it for you


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Old 11-24-2014, 10:54 PM
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Appreciated
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  #48  
Old 11-25-2014, 05:36 AM
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Re: jeep surge idle

I'd try a MAP sensor.
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