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      07-02-2013, 06:00 PM   #1
JDrago1926
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Misfiring Cylinder 3 after Cobb Install

Hello,

I just installed my Cobb and the "Check Engine Soon" light came on and the car didn't feel right at all.

It says the car is misfiring cylinder 3 and misfire with low fuel level.

Should I just changed the plugs for all 6 cylinders? If so, what do you recommend?

Code P29CF
Code P29D9
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      07-02-2013, 06:03 PM   #2
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yes !!! change plugs !!!
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      07-02-2013, 06:18 PM   #3
JDrago1926
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Quote:
Originally Posted by type rrr View Post
yes !!! change plugs !!!
I knew I was gonna have to do it eventually haha! I said before I got this watch me need plugs..... how much do all 6 plugs run for a good brand?

I also had misfire cylinder 6 and the low pressure in cylinder 6 when I was driving around, after I shut off and restarted I got the code for misfire cylinder 3.

I'm gonna get my plugs replaced tomorrow, I'm excited to see this Cobb work!
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      07-02-2013, 06:20 PM   #4
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The tune always brings to the surface the weakest parts in your system. Expect to change stuff along the way.

It doesn;t hurt to change all the plugs. It could also be your coils (and other stuff )
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      07-02-2013, 06:23 PM   #5
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Quote:
Originally Posted by marv85 View Post
The tune always brings to the surface the weakest parts in your system. Expect to change stuff along the way.

It doesn;t hurt to change all the plugs. It could also be your coils (and other stuff )
I definitely did plan, I was saying to my friend earlier "Watch me have to change my plugs and not even get to test it" haha.. I was right...

How much does it cost for coils? Is it worth it to do all the plugs at once and then see if coils need to be done or just do all 12 items at once?

Does $65-70 for the 6 plugs sound right and about $40-50 a coil sound right?

Update: I don't believe the plugs have ever been changed in the car, if they have I wouldn't know... Car has 30K miles... I'm gonna go with changing all the plugs (worth it for $70-100)...

If that doesn't work should I begin replacing coils/injectors?

Last edited by JDrago1926; 07-02-2013 at 06:37 PM..
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      07-02-2013, 06:51 PM   #6
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I just did my spark plugs last weekend after installing the JB4 G5 tune, here's the best deal I found after doing a quick search on the boards.

http://www.autohausaz.com/search/pro...2@Spark%20Plug
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      07-02-2013, 07:00 PM   #7
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Originally Posted by Quattro1.8T View Post
I just did my spark plugs last weekend after installing the JB4 G5 tune, here's the best deal I found after doing a quick search on the boards.

http://www.autohausaz.com/search/pro...2@Spark%20Plug
Thanks man I appreciate it! Did this fix your issue?
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      07-03-2013, 02:26 AM   #8
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change plugs then I would swap coil pack from 3 to 2 see if it continues in same cylinder or if it moves.
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      07-03-2013, 08:46 AM   #9
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Quote:
Originally Posted by JDrago1926 View Post
Thanks man I appreciate it! Did this fix your issue?
yes car was running smooth until I launched it a couple nights ago it threw another CEL...I did swap coil 4 and 5 (my cylinder 5 was misfiring) so I will run some codes and see if its the coil.
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      07-03-2013, 10:07 AM   #10
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http://www.e90post.com/forums/showthread.php?t=631829
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      07-04-2013, 01:27 AM   #11
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Thanks! Ordered Bosch plugs and I ordered a set of Centric C-Tek rotors (cheap ones) only until my fronts wear out. When I get some more money I will get Centric Premiums
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      07-04-2013, 01:38 PM   #12
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Originally Posted by JDrago1926 View Post
I ordered a set of Centric C-Tek rotors (cheap ones) only until my fronts wear out. When I get some more money I will get Centric Premiums
That sounds like a waste of money...just wait to do it right the first time around.
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      07-04-2013, 08:54 PM   #13
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Originally Posted by FCobra94 View Post
That sounds like a waste of money...just wait to do it right the first time around.
Waste of money or not, it's $70... I'll buy premium Centric's when I feel the need.

My front rotors are brand new just my back rotors are shit, I'll replace all 4 with premiums once these go....

Placed an order today for the following:
6 Bosch OEM Spark Plugs
2 Bosch Coils
2 Centric Rotors
$225 shipped

and last but not least the BMS spark tool for $25..

Total of $275 for 2 rotors, 6 plugs, 2 coils and a spark tool. Needless to say, my cars gonna be running a shit ton better and at least my back brakes will match my fronts rather then being shitty surfaced rotors
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      07-05-2013, 06:46 PM   #14
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Jumped the gun and purchased myself an 7" FMIC VRSF.
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      12-25-2014, 02:35 PM   #15
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Hey man, did changing the plugs solve the 2 codes you were getting? I got the exact same codes just now, I changed my plugs about 16k miles ago... What fixed yours?
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      12-25-2014, 04:30 PM   #16
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You may have an issue with a coil or a plug. Easiest is to try swapping coil location and move it from one bank to the other and see if the misfire follows.

http://blog.protuningfreaks.com/2013...is-and-repair/
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      12-25-2014, 09:02 PM   #17
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Plugs, Coils, Injectors.... in that order
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