shakes after changed Spark Plugs and Coils

Arkin · 10-13-2020, 10:49 AM

I changed all 6 plugs and Coils. Replaced with OEM plugs and Eldor Coils. There is no check engine light.
Realize when cold start that I start my car, the engine shakes for like 5 seconds and disappears. When on the highway, I floored it and I felt the engine shakes a little. I didnt feel it before the tune up.
I have 70,000 miles on my F30 now. Is there any test I can do?

340iGUY · 10-13-2020, 11:16 AM

Similar thing happened when I changed them too.
I think check for any codes and either reset adaptations or wait and let the car adapt.
Did you double-check the gaps when installing?

dmaxdmax · 10-14-2020, 05:13 AM

If you did the plugs yourself and it was your first time, 'maybe' a plug is a little loose? The torque is so low...it barely seems enough to me...but I know our plugs are delicate.

Read your codes, even though you don't have a CEL, you may show codes that will help you diagnose your issue.

If you didn't have the issue before and all you did was plugs and coils, I suspect you'll find a code pointing to a particular cylinder. BTW, if you are stock, the OEM plugs will be gapped already. If you're tuned, you would need a particular plug and/or to gap them.

Arkin · 10-17-2020, 10:01 PM

I checked the gap before installed. I got a torque ranch to the specific.

Just want to see any diagnostic reading machine I can check out.

doublevanosrc · 10-24-2020, 12:29 PM

check for a lose coil cable.

10-13-2020, 10:49 AM	#1
Arkin Private First Class 11 Rep 102 Posts Drives: F30 xdrive sedan Join Date: Apr 2016 Location: NY iTrader: (0)	shakes after changed Spark Plugs and Coils I changed all 6 plugs and Coils. Replaced with OEM plugs and Eldor Coils. There is no check engine light. Realize when cold start that I start my car, the engine shakes for like 5 seconds and disappears. When on the highway, I floored it and I felt the engine shakes a little. I didnt feel it before the tune up. I have 70,000 miles on my F30 now. Is there any test I can do? __________________ F30 335i xdrive
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10-13-2020, 11:16 AM	#2
340iGUY Enlisted Member 15 Rep 40 Posts Drives: 340i manual Join Date: Sep 2020 Location: US iTrader: (0)	Similar thing happened when I changed them too. I think check for any codes and either reset adaptations or wait and let the car adapt. Did you double-check the gaps when installing?
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10-14-2020, 05:13 AM	#3
dmaxdmax Captain 417 Rep 923 Posts Drives: 2016 M235i 6-spd Join Date: Jan 2020 Location: New Jersey iTrader: (0)	If you did the plugs yourself and it was your first time, 'maybe' a plug is a little loose? The torque is so low...it barely seems enough to me...but I know our plugs are delicate. Read your codes, even though you don't have a CEL, you may show codes that will help you diagnose your issue. If you didn't have the issue before and all you did was plugs and coils, I suspect you'll find a code pointing to a particular cylinder. BTW, if you are stock, the OEM plugs will be gapped already. If you're tuned, you would need a particular plug and/or to gap them. __________________ '92 325i, '99 328i, '16 340i, '16 M235i all manuals dmax on FB My last pre-covid standup set
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10-17-2020, 10:01 PM	#4
Arkin Private First Class 11 Rep 102 Posts Drives: F30 xdrive sedan Join Date: Apr 2016 Location: NY iTrader: (0)	I checked the gap before installed. I got a torque ranch to the specific. Just want to see any diagnostic reading machine I can check out. __________________ F30 335i xdrive
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10-24-2020, 12:29 PM	#5
doublevanosrc Loves his G20 265 Rep 2,507 Posts Drives: 2020 330ix M sport Join Date: Jul 2009 Location: Austin. Tx iTrader: (1) Garage List 2013 BMW [0.00]	check for a lose coil cable. __________________ 2020 330ix-Msport Past- 2013 135i 2011 135i
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