05-07-2018, 07:41 AM | #1 |
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Tugging or jerking feeling. Misfire? Transmission? Transfer case?
Started yesterday. Doesn't happen during shifts. When the engine gets loaded a bit, a random tugging effect is felt. If I hold gears in manual, I can seem to exaggerate the issue.
I don't notice anything while cruising or idle. I sometimes notice it under heavy throttle. Any ideas? 14 with 97k miles 35i |
05-07-2018, 12:29 PM | #3 |
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It feels like I hit a bump in the road. Or like I'm getting tapped in my rear bumper.
From some reading I did, it could possibly be the transfer case? If it were a miss I would think it would happen all the time. There were no obvious fault codes when I ran a scan. |
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05-07-2018, 01:11 PM | #4 |
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Sounds like transfer case. Are you on non-oem wheel/tire sizing?
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05-07-2018, 03:52 PM | #5 |
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Transfer case issues are typically on the 50i, not the 35i.
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05-07-2018, 06:08 PM | #6 |
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05-07-2018, 07:18 PM | #7 |
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Did you perform an Transfer Case Calibration in ISTA-D after changing the transfer case fluid?
Last edited by Mr.47; 05-07-2018 at 07:39 PM.. |
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05-07-2018, 09:26 PM | #8 |
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05-07-2018, 10:00 PM | #9 | |
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These transfer case also has clutch pack actuation values that are adaptive according to the oil degeneration/wear and tear. |
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05-07-2018, 11:37 PM | #10 | |
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but i think i'll change my sparkplugs again to rule them out, since i changed them not too long ago. and then i'll change the transfer case fluid. i drove the x5 hard tonight, and this got worse when she was hot. then later when i drove it again, it drove mostly fine, though it did stumble twice while i was backing out of the garage, foot on brake. so maybe it is a misfire... |
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05-08-2018, 09:04 AM | #12 | |
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As Alvav said if there was a misfire it will throw a cel. |
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05-09-2018, 07:47 AM | #13 |
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Brought my F15 X5 in for a vibration under idle and one spark plug was misfiring, No CEL. Was recently replaced under BMW maintenance.
On a previous E70 X5 35i, when my transfer case was failing, a sign was when performing a fully turned steering wheel to lock U-Turn, the car would shutter under load, and when turned straight would go away. Not saying that is every scenario, but the transfer case was not working and was replaced under warranty. All of this may not apply to your case, but just informing you on my experiences.
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05-09-2018, 12:05 PM | #14 |
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While my experience may not parallel yours since I drive a 50i; I did have a similar experience with the stuttering/jerking feeling.
Like you, I thought it was a transmission or transfer case problem at first. It would only happen after shifting to 4th or 5th gear under load. I also did not have a CEL come on at first. After multiple tries to recreate the problem to figure out what was going on, I did get the CEL to come on. The engine started to vibrate pretty bad so I pulled over and turned it off. After restart, the CEL was gone. I checked the code with a diagnostic tool from a friend and saw the computer shut down a cylinder due to a misfire. Long story short, brought the car in and the mechanic was adamant it was spark plugs. I was skeptical, but $350 and an hour or so later, my car was fixed after swapping out the plugs. Hope it's a simple fix for you as well! |
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05-10-2018, 01:15 AM | #15 |
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Well I had changed my spark plugs about 2 months ago, and maybe 2000 miles. Drove fine until now.
I put new plugs in tonight and took it for a drive, and it seemed to fix the issue. I couldn't see anything wrong with the previous plugs. Weird that I never got a check engine light or code. |
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05-10-2018, 08:00 AM | #16 | |
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03-02-2019, 06:59 PM | #17 | |
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I am having the exact same issue on my 50i with 60K miles. I am planning to change out plugs but wasn't sure if I should also do coils. No codes yet.
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04-28-2019, 08:36 AM | #18 |
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Hesitation under load
2014 xdrive35i. 39k miles. New to me, just picked up from Denver for the long trip to Seattle and noticed some hesitation when applying 3/4-full power. Under load there is hesitation at a few points in the rev range. As if there is a fuel cut going on. No CEL.
The PPI showed some legacy codes (not current) for a misfire. Which the shop indicted the hpfp might be getting weak. Does that sound plausible? |
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04-28-2019, 09:35 AM | #19 | ||
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https://f15.bimmerpost.com/forums/sh....php?t=1607060 |
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04-28-2019, 10:07 AM | #20 | ||
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04-28-2019, 10:37 AM | #21 |
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I had the same thing last year, the dealership replaced all plugs and coils in attempt to fix the throttle up shudder I was having. That did not fix the issue, turned out to be transfer case issues. I was under CPO warranty.
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04-28-2019, 11:57 AM | #22 | |
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