P0300 - Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum
Go Back   Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum > Technical / Performance / Model > Mazda 6 1st Generation (2002-2008) > Engine / Drivetrain > 3.0L V6
New User? Register
Mazda6Club.com is the premier Mazda 6 Forum on the internet. Registered Users do not see the above ads.
User Tag List

Reply
 
LinkBack Thread Tools
Old 10-14-2012, 06:42 PM   #1 (permalink)
Learners License
 
Join Date: Oct 2012
Posts: 34
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default P0300

Hey M6ers,

Getting this code on my 03 V6 manual.
Starts up and idles fine.
When driving however it feel real sluggish and weak.

Been doing some searching around here and it seems like either coil packs or a vac leak but before I order them I wanna be sure.

When at idle I sprayed starter fluid around the manifold and vac lines but no luck.

Pulled the plugs that I just installed last week and 3 are dark/black, 2 are light brown and 1 like yellowish/white.

Any info would be sweet. Thanks in advance.
SIX_SEVEN_ONE is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 10-14-2012, 11:19 PM   #2 (permalink)
Learners License
 
Join Date: Oct 2012
Posts: 34
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

I went ahead and order a set of coil packs. 90 bucks per pack if I was to get em locally.

Gave that a "No Thanks" and placed an order for all 6 for 80 bux.


One thing i will check when I get home is plug gap. I just trusted the manufacturer to pregap it correctly before shipping. ???
SIX_SEVEN_ONE is offline   Reply With Quote Quick reply to this message
Old 10-14-2012, 11:32 PM   #3 (permalink)
100% CANUCK

 
Mr.Smoke's Avatar
 
Join Date: Dec 2011
Location: Kitchener, ON Canada
Posts: 7,255
Mentioned: 308 Post(s)
Tagged: 2 Thread(s)
Quoted: 1202 Post(s)
Thanks: 1,420
Thanked 1,431 Times in 1,126 Posts
Groans: 1
Groaned at 8 Times in 8 Posts
iTrader: 0 reviews
Default

Always check gap before installing plugs. When i bought my ngk iridiums every plug was out of spec.

Here is something that will give insight as to sprak plug conditions.
Mr.Smoke is online now   Reply With Quote Quick reply to this message
Old 10-14-2012, 11:37 PM   #4 (permalink)
Learners License
 
Join Date: Oct 2012
Posts: 34
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

^^ I always checked gap when changing plugs on my old turboed V6 tib but when doing stock vehicles I never thought about it.

One thing I will definatly keep in mind from now on though.

Thanks for that link. Very informative
SIX_SEVEN_ONE is offline   Reply With Quote Quick reply to this message
Old 10-14-2012, 11:43 PM   #5 (permalink)
100% CANUCK

 
Mr.Smoke's Avatar
 
Join Date: Dec 2011
Location: Kitchener, ON Canada
Posts: 7,255
Mentioned: 308 Post(s)
Tagged: 2 Thread(s)
Quoted: 1202 Post(s)
Thanks: 1,420
Thanked 1,431 Times in 1,126 Posts
Groans: 1
Groaned at 8 Times in 8 Posts
iTrader: 0 reviews
Default

No prob glad i could help.

Plug gap is so important. For everything from a 2 stroke weedeater up to million dollar cars. Just my 2
Mr.Smoke is online now   Reply With Quote Quick reply to this message
Old 10-15-2012, 12:03 AM   #6 (permalink)
Learners License
 
Join Date: Oct 2012
Posts: 34
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

Understood.

What are the chances of oil leaking thru the valve seals or piston rings into the chamber but no smoke coming out the back??

Thanks!!
SIX_SEVEN_ONE is offline   Reply With Quote Quick reply to this message
Old 10-15-2012, 01:09 PM   #7 (permalink)
banana boat.

 
flipper66's Avatar
 
Join Date: Aug 2004
Location: lake Mary, Florida
Posts: 6,983
Mentioned: 52 Post(s)
Tagged: 1 Thread(s)
Quoted: 328 Post(s)
Thanks: 81
Thanked 986 Times in 837 Posts
Groans: 3
Groaned at 50 Times in 46 Posts
iTrader: 1 reviews
Default

very limited.

did you check the intake boot for rips/tears?
flipper66 is offline   Reply With Quote Quick reply to this message
Old 10-15-2012, 06:24 PM   #8 (permalink)
Learners License
 
Join Date: Oct 2012
Posts: 34
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

Not yet but I sure noticed a good/bad amount of oil in both the intake manifold and piping.
Looks like its coming from da front valve cover.

PCV still good but went ahead and ordered a new one.
SIX_SEVEN_ONE is offline   Reply With Quote Quick reply to this message
Old 10-16-2012, 08:24 PM   #9 (permalink)
Learners License
 
Join Date: Oct 2012
Posts: 34
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks: 2
Thanked 0 Times in 0 Posts
Groans: 0
Groaned at 0 Times in 0 Posts
iTrader: 0 reviews
Default

Update: Plug gap was definatly off. Gapped them to .044, put everything back together, test drove it with same issues.

Starts up fine, idles good, lack of power down low and bogges a bit when accelerating.

It does smoke out a bit out the back. If coil packs dont fix the prob I may look into changing out valve seals.

How can I confirm if the seals are out? Besides the smoke coming out the back what else can I do to confirm it is seals and not something else?

Thanks!!!!!!

Last edited by SIX_SEVEN_ONE; 10-16-2012 at 08:32 PM.
SIX_SEVEN_ONE is offline   Reply With Quote Quick reply to this message
Old 10-17-2012, 11:55 AM   #10 (permalink)
banana boat.

 
flipper66's Avatar
 
Join Date: Aug 2004
Location: lake Mary, Florida
Posts: 6,983
Mentioned: 52 Post(s)
Tagged: 1 Thread(s)
Quoted: 328 Post(s)
Thanks: 81
Thanked 986 Times in 837 Posts
Groans: 3
Groaned at 50 Times in 46 Posts
iTrader: 1 reviews
Default

leak down test.

again it is very unlikely.
flipper66 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Mazda 6 Forums : Mazda 6 Forum / Mazda Atenza Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 07:41 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.3.2