Whoo hoo! First coil replacement!

Boosted12a · 01-31-2020, 04:22 PM

Got a check engine light on the way to work, car ran like crap. Pulled codes after work. Missfire on #4. Swapped the coil to #1 and the missfire moved. Got a new coil from Napa and it's running smoother than ever. 335xi with 104k. Not sure if any of em have been changed before or not. Plugs were changed about 8k ago by previous owner. I love easy fixes like this!

b92 · 02-03-2020, 10:48 AM

Cool!

mweisdorfer · 02-03-2020, 11:45 AM

Quote:

Originally Posted by Boosted12a

Got a check engine light on the way to work, car ran like crap. Pulled codes after work. Missfire on #4. Swapped the coil to #1 and the missfire moved. Got a new coil from Napa and it's running smoother than ever. 335xi with 104k. Not sure if any of em have been changed before or not. Plugs were changed about 8k ago by previous owner. I love easy fixes like this!

I think with 104,000 miles, the coils have never been changed, in all likelihood. OEM coils are good for about 100,000 miles, if the engine hasn't been tuned.

Buying a single coil is just putting a band aide on a future, bigger problem (5 more coils need to be replaced).

Eldor Coils are the latest & greatest for the e90. You can get Bosch (OEM) for about $50 to 75.00 cheaper. I'd get them from FCP Euro w/ a lifetime warranty.

Jklad · 02-03-2020, 12:47 PM

Quote:

Originally Posted by mweisdorfer

Quote:

Originally Posted by Boosted12a

Got a check engine light on the way to work, car ran like crap. Pulled codes after work. Missfire on #4. Swapped the coil to #1 and the missfire moved. Got a new coil from Napa and it's running smoother than ever. 335xi with 104k. Not sure if any of em have been changed before or not. Plugs were changed about 8k ago by previous owner. I love easy fixes like this!

I think with 104,000 miles, the coils have never been changed, in all likelihood. OEM coils are good for about 100,000 miles, if the engine hasn't been tuned.

Buying a single coil is just putting a band aide on a future, bigger problem (5 more coils need to be replaced).

Eldor Coils are the latest & greatest for the e90. You can get Bosch (OEM) for about $50 to 75.00 cheaper. I'd get them from FCP Euro w/ a lifetime warranty.

And if the coils haven't been replaced, the plugs probobly haven't in a while either. Might be good to have a start fresh, they are cheap enough and easy to do.

type-dRew · 02-03-2020, 01:22 PM

Get yourself some new plugs and coils, a full set now, save yourself pain later.

FCP, lifetime replacement.

Bimmer_Engineer · 02-03-2020, 07:26 PM

He said the plugs were changed 8k ago...

Boosted12a · 02-04-2020, 01:32 PM

Yeah, I plan on getting a full set from fcp. I'll have to look at the box for the brand again. I feel lucky the parts store 1/4 mile away from work had one. I'm gonna go mhd 2+ once I do my down pipes and plan on doing plugs at the same time. Probbaly injectors not long after

Saif2018 · 02-04-2020, 10:09 PM

Quote:

Originally Posted by mweisdorfer

I think with 104,000 miles, the coils have never been changed, in all likelihood. OEM coils are good for about 100,000 miles, if the engine hasn't been tuned.

Buying a single coil is just putting a band aide on a future, bigger problem (5 more coils need to be replaced).

Eldor Coils are the latest & greatest for the e90. You can get Bosch (OEM) for about $50 to 75.00 cheaper. I'd get them from FCP Euro w/ a lifetime warranty.

Seconded,

All 6 coils should be replaced ideally, if one went the others will be on the way,

Eldor coils failing that Delphi ones.

mweisdorfer · 02-05-2020, 07:54 PM

Quote:

Originally Posted by Boosted12a

Yeah, I plan on getting a full set from fcp. I'll have to look at the box for the brand again. I feel lucky the parts store 1/4 mile away from work had one. I'm gonna go mhd 2+ once I do my down pipes and plan on doing plugs at the same time. Probbaly injectors not long after

Get Eldor Coils & NKG one step colder plugs gapped are .022. That's what I have & the car runs flawlessly, smooth as silk. I also have MHD 2+ 93 oct

MMP Downpipes & use the BMS gaskets for the downpipe & mid-pipe connection. MMP downpipes cost $200.00. I have these too. They work great!

https://mmp-e.com/products/3-catless...2008-2009-2010

Boosted12a · 02-05-2020, 10:58 PM

I have a set of arm down pipes waiting to go on. #4 misfire cam back last night. Thought maybe the plug got fouled when the coil shit out. Pulled out the plugs. They all looked good. Went to reinstallem and a dropped on on my garage floor. And just my luck it landed on the electrode. Ok let's try to bend it back, shit broke the ceramic. Only plugs I could find were the stock 3 printers. Put them in. Works great. And today the #4 missfire is back. Pulled the plug on 4 again, ok seemed kinda loose but looked good. Used a tq wrench this time. Missfire still there. Ok swap the coil from 4 to 1. Missfire on 1. So I went and got another coil. Good to go now. May installed dp tomorrow. I'll change the plugs and coils when I get a missfire again

01-31-2020, 04:22 PM	#1
Boosted12a Second Lieutenant 68 Rep 210 Posts Drives: BMW 335i x Join Date: Jun 2019 Location: Va iTrader: (0)	Whoo hoo! First coil replacement! Got a check engine light on the way to work, car ran like crap. Pulled codes after work. Missfire on #4. Swapped the coil to #1 and the missfire moved. Got a new coil from Napa and it's running smoother than ever. 335xi with 104k. Not sure if any of em have been changed before or not. Plugs were changed about 8k ago by previous owner. I love easy fixes like this!
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02-03-2020, 10:48 AM	#2
b92 Major 540 Rep 1,040 Posts Drives: E92 335is, 6MT Join Date: Feb 2016 Location: Rhode Island iTrader: (2)	Cool! __________________ 2011 E92 335is, Space Grey/Coral Red, 6MT. RB 2+, Wedge tuned. E85 PI coming soon.
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02-03-2020, 01:22 PM	#5
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	Get yourself some new plugs and coils, a full set now, save yourself pain later. FCP, lifetime replacement. __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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02-03-2020, 07:26 PM	#6
Bimmer_Engineer Lieutenant Colonel 1044 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	He said the plugs were changed 8k ago...
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02-04-2020, 01:32 PM	#7
Boosted12a Second Lieutenant 68 Rep 210 Posts Drives: BMW 335i x Join Date: Jun 2019 Location: Va iTrader: (0)	Yeah, I plan on getting a full set from fcp. I'll have to look at the box for the brand again. I feel lucky the parts store 1/4 mile away from work had one. I'm gonna go mhd 2+ once I do my down pipes and plan on doing plugs at the same time. Probbaly injectors not long after
	Appreciate 0 Quote

02-05-2020, 10:58 PM	#10
Boosted12a Second Lieutenant 68 Rep 210 Posts Drives: BMW 335i x Join Date: Jun 2019 Location: Va iTrader: (0)	I have a set of arm down pipes waiting to go on. #4 misfire cam back last night. Thought maybe the plug got fouled when the coil shit out. Pulled out the plugs. They all looked good. Went to reinstallem and a dropped on on my garage floor. And just my luck it landed on the electrode. Ok let's try to bend it back, shit broke the ceramic. Only plugs I could find were the stock 3 printers. Put them in. Works great. And today the #4 missfire is back. Pulled the plug on 4 again, ok seemed kinda loose but looked good. Used a tq wrench this time. Missfire still there. Ok swap the coil from 4 to 1. Missfire on 1. So I went and got another coil. Good to go now. May installed dp tomorrow. I'll change the plugs and coils when I get a missfire again
	Appreciate 0 Quote