Installed Plugs & Coils

ATLIEN · 11-28-2014, 07:46 PM

Changed plugs and Coils Question

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Hello, I am the 3rd owner of a 2008 BMW 335i. It was CPO to me when I bought it with 58k miles. It now has about 70k miles. I have had 2 instances where I needed new coils over the past 10k miles and I threw a P0306 code and a service engine soon light. I figured let's grab four more coils online and while I am in there grab the Bosch plugs too (ZGR6STE2).

Long story short, I installed everything and torqued to spec and was expecting a smooth crank. The old plugs were actually in good shape. WHen i fired it up the engine was rough as heck and I could tell something was not right. So I checked to make sure everything was securely connected and it was and still the massive shaking and I even happened to throw more codes. P0305, p0302 and P0301.

I took everything out and reinstalled the old plugs and got things back to normal. I put the new coils in and cleared the codes and it ran fine.

My question is concerning the plugs. Should this not be pretty plug and play or did I need to give them some time to adjust?

Snypa · 11-29-2014, 01:19 AM

Sounds like you did everything correct. Perhaps an injector is leaking?

ATLIEN · 11-29-2014, 01:31 AM

Quote:

Originally Posted by Snypa

Sounds like you did everything correct. Perhaps an injector is leaking?

Car runs like a top now. No codes. Just baffled by the plugs.

888Concept · 11-29-2014, 03:13 AM

Quote:

Originally Posted by ATLIEN

Changed plugs and Coils Question

--------------------------------------------------------------------------------
Hello, I am the 3rd owner of a 2008 BMW 335i. It was CPO to me when I bought it with 58k miles. It now has about 70k miles. I have had 2 instances where I needed new coils over the past 10k miles and I threw a P0306 code and a service engine soon light. I figured let's grab four more coils online and while I am in there grab the Bosch plugs too (ZGR6STE2).

Long story short, I installed everything and torqued to spec and was expecting a smooth crank. The old plugs were actually in good shape. WHen i fired it up the engine was rough as heck and I could tell something was not right. So I checked to make sure everything was securely connected and it was and still the massive shaking and I even happened to throw more codes. P0305, p0302 and P0301.

I took everything out and reinstalled the old plugs and got things back to normal. I put the new coils in and cleared the codes and it ran fine.

My question is concerning the plugs. Should this not be pretty plug and play or did I need to give them some time to adjust?

I think it may be a gapping problem on those new plugs.

pits200 · 11-29-2014, 05:50 AM

If plugs are the variable and its on multiple cylinders and different banks it has to be the gapping like the post above says.

ATLIEN · 11-29-2014, 08:59 AM

Ok, I will check the gaps out. The new plugs smelled heavily of fuel and were pretty dark when I took them out. Only in the car a max of 30 seconds.Thought they were pregapped but I will double check. I am looking to add a cobb accessport next month and wanted to knock out the basic maintenance issue like coils and plugs ahead of time. I'm ordering the CAP, Mishimoto intercooler and a charge pipe and calling it a day.

CALWATERBOY · 11-29-2014, 10:01 AM

Quote:

Originally Posted by ATLIEN

Ok, I will check the gaps out. The new plugs smelled heavily of fuel and were pretty dark when I took them out. Only in the car a max of 30 seconds.Thought they were pregapped but I will double check. I am looking to add a cobb accessport next month and wanted to knock out the basic maintenance issue like coils and plugs ahead of time. I'm ordering the CAP, Mishimoto intercooler and a charge pipe and calling it a day.

Ummmm. Which plugs - NGK?

FL335 · 11-29-2014, 10:23 AM

Those Bosch plugs come pre-gapped. That is an odd issue. Let us know what comes up.

ATLIEN · 11-29-2014, 07:03 PM

Bosch ZGR6STE2

CALWATERBOY;17004314]Ummmm. Which plugs - NGK?[/QUOTE]

danniexi · 02-20-2015, 04:55 PM

Quote:

Originally Posted by ATLIEN

Ok, I will check the gaps out. The new plugs smelled heavily of fuel and were pretty dark when I took them out. Only in the car a max of 30 seconds.Thought they were pregapped but I will double check.

sounds like leaky injectors. get them replaced.

11-28-2014, 07:46 PM	#1
ATLIEN Captain 587 Rep 805 Posts Drives: 08 335i & 11 M3 ZCP Join Date: Jun 2013 Location: Greenville, SC iTrader: (0)	Installed Plugs & Coils - Misfires? Changed plugs and Coils Question -------------------------------------------------------------------------------- Hello, I am the 3rd owner of a 2008 BMW 335i. It was CPO to me when I bought it with 58k miles. It now has about 70k miles. I have had 2 instances where I needed new coils over the past 10k miles and I threw a P0306 code and a service engine soon light. I figured let's grab four more coils online and while I am in there grab the Bosch plugs too (ZGR6STE2). Long story short, I installed everything and torqued to spec and was expecting a smooth crank. The old plugs were actually in good shape. WHen i fired it up the engine was rough as heck and I could tell something was not right. So I checked to make sure everything was securely connected and it was and still the massive shaking and I even happened to throw more codes. P0305, p0302 and P0301. I took everything out and reinstalled the old plugs and got things back to normal. I put the new coils in and cleared the codes and it ran fine. My question is concerning the plugs. Should this not be pretty plug and play or did I need to give them some time to adjust?
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11-29-2014, 01:19 AM	#2
Snypa Captain 40 Rep 656 Posts Drives: Like a mahdman ! Join Date: May 2013 Location: I-75 iTrader: (3)	Sounds like you did everything correct. Perhaps an injector is leaking? __________________ SUPER SLOW E90
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11-29-2014, 05:50 AM	#5
pits200 Colonel 552 Rep 2,598 Posts Drives: 09 335i X-Drive Black Sapphire Join Date: Mar 2010 Location: Pittsburgh iTrader: (1)	If plugs are the variable and its on multiple cylinders and different banks it has to be the gapping like the post above says.
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11-29-2014, 08:59 AM	#6
ATLIEN Captain 587 Rep 805 Posts Drives: 08 335i & 11 M3 ZCP Join Date: Jun 2013 Location: Greenville, SC iTrader: (0)	Ok, I will check the gaps out. The new plugs smelled heavily of fuel and were pretty dark when I took them out. Only in the car a max of 30 seconds.Thought they were pregapped but I will double check. I am looking to add a cobb accessport next month and wanted to knock out the basic maintenance issue like coils and plugs ahead of time. I'm ordering the CAP, Mishimoto intercooler and a charge pipe and calling it a day.
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11-29-2014, 10:23 AM	#8
FL335 Banned 92 Rep 707 Posts Drives: 2009 335i Join Date: Oct 2013 Location: Florida Beaches iTrader: (0)	Those Bosch plugs come pre-gapped. That is an odd issue. Let us know what comes up.
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11-29-2014, 07:03 PM	#9
ATLIEN Captain 587 Rep 805 Posts Drives: 08 335i & 11 M3 ZCP Join Date: Jun 2013 Location: Greenville, SC iTrader: (0)	Bosch ZGR6STE2 CALWATERBOY;17004314]Ummmm. Which plugs - NGK?[/QUOTE]
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