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Old 04-06-2015, 05:58 PM
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Jeep randomly stalls after accelerating from a stop

I was in NY when I got a call saying that the jeep had stalled 2X when the gas was pressed both times from a stopped position. When I got home I brought the jeep into the shop, no codes at all, no CEL and they ran the hour long diagnostic for free which turned up absolutely nothing. Today while waiting for a spot to put my boat into the water I started to accelerate and the jeep stalled out, I put it in park and it started again. After leaving the lake I came to a stop light and when I went to go on green the jeep stalled again, again I put it in park and it was slightly hesitant to start but it started. Everything kept running such as the radio and the AC just not the jeep. The jeep has not giving me any issues when it is moving just after leaving from a stopped position. Bad TPS?

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Old 04-06-2015, 10:28 PM
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Re: Jeep randomly stalls after accelerating from a stop

I would check your spark plugs, similar issue happened to me not to long ago and dealer could not figure out what it was for almost a month because no codes appeared and then they eventually put in a recorder and it came up as the spark plugs being the issue.


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Old 04-07-2015, 12:17 AM
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Re: Jeep randomly stalls after accelerating from a stop

Normally when spark plugs are the problem, the PCM should have stored a misfire code. I would more believe in a crank sensor which is getting bad, they will not allways set a fault code when getting bad.
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Old 04-07-2015, 06:32 AM
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Jeep randomly stalls after accelerating from a stop

They replaced my pcm because they thought that's what the issue was and it was still happening


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Old 04-07-2015, 04:03 PM
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Re: Jeep randomly stalls after accelerating from a stop

So I replaced my TPS because I noticed that my old TPS appeared to be slightly separating from its main housing when checking the wiring. Before replacing the old TPS my gas miles to empty showed 290, after replacing it, it read 249 then dropped to 242 and raised itself back up again to 249 (WEIRD) I drove the jeep around the block a few times and it actually stalled again from a stopped position, and stalled immediately after giving it gas. It was running fine until I gave it gas as this seems to be the only time it happens. It only happened 1 time in the 10 or 15 stop and goes I performed. I had replaced my spark plugs last month along with having an oil change. My IAC had also been replaced a month ago because it had gone bad.

Some other minor seeming issues seemed to be corrected such as a rough(er) idle and poor acceleration but I wont really know about the acceleration issue until tomorrow as its notorious for my jeep in the morning.

On a side note, is it normal to have condensation on what appears to be a AC line?
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Old 04-07-2015, 06:50 PM
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Re: Jeep randomly stalls after accelerating from a stop

Did you use the standard copper plugs? The 4.0 (and 4.7) seem to have problems with any type of fancy plugs (irridium etc).
That the AC line has condensation on it is normal, when you feel on the line you will see its cold and moisture in the air will condensate on cold surfaces.
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Old 04-07-2015, 07:44 PM
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Re: Jeep randomly stalls after accelerating from a stop

I honestly dont remember, I went in told them what I needed, the pregapped were like 50 cents more so I grabbed those
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