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Misfire code p0304

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Old 01-09-2014, 09:57 PM
  #11  
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I like using the vacuum hose at the brake booster. The hose end by #2 on the figure below
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Old 01-13-2014, 08:37 AM
  #12  
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I pop the PCV hose off of the valve cover.

Interesting that that TSB is NOT for the 2.2L, but every other one.
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Old 01-13-2014, 11:50 AM
  #13  
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thanks don brew is this the hose that connects to the throttle body and valve cover ? any pics? I want to clean the intake and valves,and also the crank case with sea-foam thanks...
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Old 01-13-2014, 01:42 PM
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Originally Posted by hurst2001
thanks don brew is this the hose that connects to the throttle body and valve cover ? any pics? I want to clean the intake and valves,and also the crank case with sea-foam thanks...

Yes, from the valve cover to the air horn. That bit of plastic is just an elbow, not a valve. I figured it cleaned the TB on the way in. I could not think of any reason to worry about which side of the butterfly it got in on.

Be sure to securely re attach the hose to the valve cover. A loose one can cause OBDII codes for "too lean" etc.
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Old 01-14-2014, 12:45 PM
  #15  
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Ok last question when i pull the hose off then start the car and pour it in slowly? just like when you use brake booster hose correct....
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Old 01-14-2014, 04:11 PM
  #16  
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Originally Posted by hurst2001
Ok last question when i pull the hose off then start the car and pour it in slowly? just like when you use brake booster hose correct....
YES, while your lovely assistant keeps a foot on the gas pedal, revved up to around 2K, IIRC. Look at the seafoam.com site for exact directions.

You need the lovely assistant because the drive by wire won't let you hold the butterfly open by hand.
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Old 01-14-2014, 07:07 PM
  #17  
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Thanks don brew will do
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Old 01-20-2014, 01:10 PM
  #18  
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Ok update i have not did the sea-foam yet but i had my battery replaced Friday, it was 6 half years old well since three days have pass no check engine light yea ! So after when i load test it when it was warmer it was marginal ,so my theory is when it got colder and after the car sat all night ,when trying to start maybe it was just getting by but not enough juice and turn on the check engine light for some reason if it possible the motor is idling a little smoother too just kind of weird i say... But problem fixed just passing this on
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Old 01-20-2014, 09:36 PM
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Originally Posted by hurst2001
Ok update i have not did the sea-foam yet but i had my battery replaced Friday, it was 6 half years old well since three days have pass no check engine light yea ! So after when i load test it when it was warmer it was marginal ,so my theory is when it got colder and after the car sat all night ,when trying to start maybe it was just getting by but not enough juice and turn on the check engine light for some reason if it possible the motor is idling a little smoother too just kind of weird i say... But problem fixed just passing this on
Well guess what its back started it last night with remote start and ran until i open the rear door and shut off and it did it once before ...p0304 this is crazy so next going to run sea foam thur it and see if that works,just thinking if i have a intake gasket leak ?i have check the plug on cylinder no indication of dex cool on the plugs ...just weird only does it when cold ,these is just driving me crazy..
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Old 01-21-2014, 09:03 AM
  #20  
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I don't remember if you already switched injectors around.

That would be intake gasketS, there are 4 of then they are rubber O-rings. Maybe check the bolts. But, I think you are heading towards internal problems like rings or valves.
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