Stumble at Idle

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Aug 23, 2018 | 07:00 PM

#16

steinernm

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Quote:

Originally Posted by FL SuperDuty

Watch ICP press while it is stumbling and see if the reading is changing.
Mine does the same thing. I either have a bad ICP or a bad connection/pigtail/wire that’s intermittent

I will do this! Thanks!

Aug 23, 2018 | 07:02 PM

#17

steinernm

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Quote:

Originally Posted by FiznUKa

Does this stumble almost feel like the engines going to quit? Or are you watching the RPM gauge fluctuate a little up and down? When I had an injector going out it was like the engine was going to stop.

When it stumbles it just skips a little and the RPMs drop very quickly just a little bit. The RPMs used to fluctuate up and down but now when it acts up it stumbles. It’s hard to hear on the video but you can hear that skip, it doesn’t seem like the engine is going to stop because it recovers the idle rhythm so quickly and lasts just for a short period.

Aug 24, 2018 | 06:57 AM

#18

steinernm

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I unplugged and then re-plugged in the ICP sensor last night. I will report back if it does or doesn’t happen again!

Aug 24, 2018 | 08:09 AM

#19

FL SuperDuty

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Leaving the ICP unplugged should also get rid of the stumble IF that is the issue

Aug 24, 2018 | 01:36 PM

#20

steinernm

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No stumble this morning or during my drive at lunch. I will report back when/if it comes back! If it doesn’t return, then unplugging and re-plugging in the ICP sensor took care of it. Time will tell. Thanks all for your help.

Aug 24, 2018 | 04:19 PM

#21

semperstrokin

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Mine would do this when the oil would get old, around 5K mikes. I used to change it at 7K, with an oil analyst. My fix, change the oil at 5K miles, I use Mobil 1 TDT and Mobil Delvac both 5w-40. I have 180,000 miles 05 F250.

Aug 28, 2018 | 02:44 PM

#22

steinernm

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Quote:

Originally Posted by semperstrokin

This is an interesting point. I was running Rotella 15W-40 conventional oil and it started when I was at the very end of a 5,000 mile change, and on this oil run I had towed probably 1,500 miles, so I thought to myself "uh oh, I better change the oil." Well, I then switched to 5W-40 synthetic Rotella and only have maybe 1,500 miles on this oil change so I wonder if something was happening with the injectors and dirty oil and maybe it just took a while to clean up?
Anyhow, I have not had any more issues but I will report back either way!

Aug 28, 2018 | 03:30 PM

#23

wakeupluis

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I just posted an issue that sounds just like yours. When mine misses or stumbles at idle as you call it. It puffs dark smoke that smells like burned plastic to me. It doesnt happen all the time. Its intermittent. It's actually stalled on me twice. But started right up. Started a few days ago. I unplugged the icp and replugged...see if that helps me...