6.2 idle
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Elder User
Joined: Dec 2018
Posts: 652
Likes: 5
From: Katy Texas
6.2 idle
My dad gum 2017 6.2 has developed (i think) what feels like a random miss while idling in park or sitting at a stop light. It started out like a subtle random jiggle that i could feel through the seat.... it seems to be getting wose over the last week.... but it could be in my head. Multiple tanks of gas, no CEL. No visible drop of RPM on tach needle. Runs fine with plenty of power and no drop in fuel mileage. Does everyone elses 6.2 idle smooth or do yall have a random subtle jiggle you can feel through the seat? Just wondering before i take the dang thang in.....
Elder User
Joined: Mar 2017
Posts: 764
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being a 2017, how many miles on the truck?
If you're at 50k or more, you might consider replacing the spark plugs (all 16). I realize they are supposed to last 100k miles, but the 6.2L is hard on plugs and many have reported that they have solved some issues with plug replacement.
If you're at 50k or more, you might consider replacing the spark plugs (all 16). I realize they are supposed to last 100k miles, but the 6.2L is hard on plugs and many have reported that they have solved some issues with plug replacement.
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Elder User
Joined: Dec 2018
Posts: 652
Likes: 5
From: Katy Texas
Im only at 10,500 miles..... pretty sure my truck always idled smoothly. I just noticed it here in the last 3 weeks or so... i just disconnected my battery for a reset. I will report back.
Senior User
Joined: Feb 2018
Posts: 145
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It could be your A/C compressor kicking on and off. Just a thought. Turn off your A/C and see if you still feel a vibration that comes and goes.
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Elder User
Joined: Dec 2018
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From: Katy Texas
Thanks man. I had already thought of that and it seems to make no difference.
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Junior User
Joined: Oct 2017
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Mine does something similar. Especially when I am moving forward slowly and stopping occasionally, like in the student drop-off line at my kids school. However, I do get a dip in RPM's and a few times it has almost stalled. No error codes or anything.
Fleet Mechanic
Joined: Dec 2012
Posts: 1,304
Likes: 93
could it be fuel pump check valve after warm/driven?. can also cause long crank issue as pressures are off/a smidge low as pressure not holding completely but not low enough to throw a code? a 2017 with LOW miles, I would do plugs, air filter, clean MAF, throttlebody.
low usage gunking things up a bit?
low usage gunking things up a bit?
Thread Starter
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Elder User
Joined: Dec 2018
Posts: 652
Likes: 5
From: Katy Texas
could it be fuel pump check valve after warm/driven?. can also cause long crank issue as pressures are off/a smidge low as pressure not holding completely but not low enough to throw a code? a 2017 with LOW miles, I would do plugs, air filter, clean MAF, throttlebody.
low usage gunking things up a bit?
low usage gunking things up a bit?
Logistics Pro
Joined: Nov 2004
Posts: 4,795
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HMMMM ya know sometimes it does seem to turn over a few extra times when starting when its warm. The stumble is more pronounced when the truck is at operating temp. I was looking under the hood this morning, and i am not seeing the MAF...... hate to sound like a dumb a$$, but where exactly is it located on the intake? Dosent seem to be in the traditional spot. This sucks because i got the call today about some work, and i am hitting the hail trail on tuesday. Now im a hair concerned with driving this thing across America over the next 6 months...... just dont need it to crap the bed in dog leg oklahoma while i am out trying to make my living....
also....have you checked for any codes? Might have one even though you’re not getting a cel