New Sparkplugs and coils...less power?

MM328i · 12-07-2014, 01:19 PM

Could really use some opinions on my car. Recently my 2007 328i started shaking and the car went into limp mode. After using my OBD scanner, it seemed to be a cylinder 3 misfire. Since I'm at 85,000, I thought I might as well do all six sparkplugs, and replace all ignition coils. To save some money from the dealership, I bought the following parts:

http://shop.advanceautoparts.com/p/b...bos/10808270-P

http://www.autozone.com/external-eng...hc/937714_0_0/

I had the work done at my BMW dealership. Seemed to solve the issue, as the car runs again.

However, after driving the car around a little more, I really feel like I notice reduced power, and slight rougher idle. Even though these parts seem to be compatible with my car (I would hope the dealership would tell me if they felt the parts I bought were incorrect, they could sell me new ones that way), did I buy the wrong parts? Does the car need to get used to these new parts? After paying a decent amount to have everything done, it would be disappointing if I somehow reduced my car's power and effectiveness. Any insight would be appreciated!

HCGxKaLiBeR · 12-07-2014, 04:15 PM

After I changed my spark plugs, the car had rough idle (no rough idle on the old plugs), then I used JB4 reseted the adaptions and the car runs normal now.

It is worth a try. Since you have a 328i, no JB4. You need to find a way to reset it.

Bronze · 12-07-2014, 04:37 PM

Did you gap the new plugs properly?

galahad05 · 12-07-2014, 05:28 PM

Quote:

Originally Posted by Bronze

Did you gap the new plugs properly?

queensfield · 12-07-2014, 06:09 PM

Yup. After checking for the proper gap, make sure that the ignition coil is seated all the way down

Rickygst · 12-07-2014, 08:30 PM

I would check the gap of the plugs. Since they are not BMW plugs the dealer may not have look at the gap

MM328i · 12-07-2014, 09:40 PM

Thanks for the replies. I'm starting to think that I may have bought plugs with either two wide of a gap or that because I brought my own parts they didn't care to check the gap. Not sure what I'm going to do at this stage. MPG seems to be okay after more driving.

Do they change the transmission adaptation when they change the ignition coils and spark plugs? I feel this is having some impact if so.

12-07-2014, 01:19 PM	#1
MM328i Bimmerhead 1 Rep 35 Posts Drives: 328i Join Date: Mar 2007 Location: AZ iTrader: (0)	New Sparkplugs and coils...less power? Could really use some opinions on my car. Recently my 2007 328i started shaking and the car went into limp mode. After using my OBD scanner, it seemed to be a cylinder 3 misfire. Since I'm at 85,000, I thought I might as well do all six sparkplugs, and replace all ignition coils. To save some money from the dealership, I bought the following parts: http://shop.advanceautoparts.com/p/b...bos/10808270-P http://www.autozone.com/external-eng...hc/937714_0_0/ I had the work done at my BMW dealership. Seemed to solve the issue, as the car runs again. However, after driving the car around a little more, I really feel like I notice reduced power, and slight rougher idle. Even though these parts seem to be compatible with my car (I would hope the dealership would tell me if they felt the parts I bought were incorrect, they could sell me new ones that way), did I buy the wrong parts? Does the car need to get used to these new parts? After paying a decent amount to have everything done, it would be disappointing if I somehow reduced my car's power and effectiveness. Any insight would be appreciated! __________________ 2007 E90 328i \| BLK ON BLK \| STEP \| ZSP \| ZPP \| XENON \| CA \| OEM ALARM
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12-07-2014, 04:15 PM	#2
HCGxKaLiBeR Private 13 Rep 92 Posts Drives: 2009 N54 335i Convertible Join Date: Aug 2014 Location: CT iTrader: (0)	After I changed my spark plugs, the car had rough idle (no rough idle on the old plugs), then I used JB4 reseted the adaptions and the car runs normal now. It is worth a try. Since you have a 328i, no JB4. You need to find a way to reset it. __________________ JB4 Map 5, HKS SSQV 4 BOV, aFe stage 2 cold air intake with scoops, Alpina B3 flash
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12-07-2014, 04:37 PM	#3
Bronze First Lieutenant 12 Rep 394 Posts Drives: 2008 335i sedan Join Date: Mar 2012 Location: Berkley, MI iTrader: (1) Garage List 2008 BMW 335i [0.00]	Did you gap the new plugs properly? __________________ Bronze 2008 335i sedan \| black/black \| Sport \| Premium
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12-07-2014, 06:09 PM	#5
queensfield First Lieutenant 21 Rep 364 Posts Drives: 2006 330i E90 Join Date: Aug 2011 Location: So Cal iTrader: (0)	Yup. After checking for the proper gap, make sure that the ignition coil is seated all the way down
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12-07-2014, 08:30 PM	#6
Rickygst Second Lieutenant 19 Rep 260 Posts Drives: 335i Join Date: Jun 2010 Location: Atlanta iTrader: (5)	I would check the gap of the plugs. Since they are not BMW plugs the dealer may not have look at the gap
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12-07-2014, 09:40 PM	#7
MM328i Bimmerhead 1 Rep 35 Posts Drives: 328i Join Date: Mar 2007 Location: AZ iTrader: (0)	Thanks for the replies. I'm starting to think that I may have bought plugs with either two wide of a gap or that because I brought my own parts they didn't care to check the gap. Not sure what I'm going to do at this stage. MPG seems to be okay after more driving. Do they change the transmission adaptation when they change the ignition coils and spark plugs? I feel this is having some impact if so. __________________ 2007 E90 328i \| BLK ON BLK \| STEP \| ZSP \| ZPP \| XENON \| CA \| OEM ALARM
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