Engine surging and now have misfire codes

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by Marshall Madison, Oct 12, 2019.

  1. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    I was wondering if someone could give me a little insight to what i'm seeing. I am currently running a 91 octane tune and was starting to get some weird surging feeling when I would kick it down a gear and give it some gas but not wot. Yesterday I kicked it down at wot and the rpm's shot up but the engine lost power and when the rpm's came down it was sputtering and wouldn't run right. I shut the car off and restarted it and seemed fine. I took the 3 bar out and installed stock map and flashed back to stock to see if it was in the tune and car seemed to run fine. I kicked it down on the interstate today and it did the same thing, rpm's shot up but no power and then ran like a bag of shit so I pulled over and restarted it and got it home but its getting worse. I did get a check engine light that stays on and codes P0300 P0301 P0302 P0303 which all are misfire codes. Any help would be great. BTW it is a 17' non ppo that is all stock except 3bar and tune.
     
    Last edited: Oct 12, 2019
  2. krewat

    krewat SHO Member

    Joined:
    Dec 20, 2012
    Messages:
    1,056
    Likes Received:
    936
    Occupation:
    System Administrator
    Location:
    Long Island
    Home Page:
    Check that that stupid boost reference hose didn't come loose. Other than that, sounds like fuel delivery, but you'd have a code for that.
     
  3. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    reference hose?
     
    Last edited: Oct 12, 2019
  4. krewat

    krewat SHO Member

    Joined:
    Dec 20, 2012
    Messages:
    1,056
    Likes Received:
    936
    Occupation:
    System Administrator
    Location:
    Long Island
    Home Page:
    It's on the plastic piping right after the air filter. Look around for hoses that fell off. It's a small vacuum hose. Sorry, no pics.
     
  5. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    Will do, thanks
     
  6. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    I didn't find any hoses that were loose or cracked as far as I can see.
    Update: Pulled the plugs and checked for gap and color, light gray and gaps are all good. No signs of blow by or anything catastrophic. Coil packs look good with no signs of arcing of loose connections, I did replace the boots and seals when I did the plugs around 2.5k ago. Took it for a spin and if I hammer it it falls on its face and stumbles until I shut it off and restart it, fuel rail pressure according to my ngauge gets as high as 1700 psi, but not sure how accurate that is. If I bring the throttle on slowly it will build boost to around 11psi so I dont think that I burned up a turbo, but not sure. CEL light is always on and codes are all the same P0300-0303
     
    Last edited: Oct 12, 2019
  7. Zpak

    Zpak SHO Member

    Joined:
    Jun 1, 2017
    Messages:
    156
    Likes Received:
    125
    Gender:
    Male
    Occupation:
    Work
    Location:
    NWI
    Did you say it did the same thing after you flashed back to stock tune? You should still be under warranty with a ‘17 right?
     
  8. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    Yes it is still under warranty, when I bought it I got a bumper to bumper to 125k but only have 40k on it. I did return to stock and problem still the same if not getting worse. My only concern with dealer is them trying to blame it on tuning, not that they will even know unless they have a way to tell in computer?
     
  9. luigisho

    luigisho SHO Member

    Joined:
    Nov 2, 2001
    Messages:
    8,833
    Likes Received:
    1,817
    Location:
    va beach,va
    Home Page:
    Vacuum leaks? I assume those codes are for cylinders on the same side of the motor & use the same head (and head gasket)?
     
  10. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    Yes both stock file and 2bar
     
  11. Zpak

    Zpak SHO Member

    Joined:
    Jun 1, 2017
    Messages:
    156
    Likes Received:
    125
    Gender:
    Male
    Occupation:
    Work
    Location:
    NWI
    Just leave it stock and take it in. Also, don’t leave your device in the car if you have it mounted or whatever.
     
  12. luigisho

    luigisho SHO Member

    Joined:
    Nov 2, 2001
    Messages:
    8,833
    Likes Received:
    1,817
    Location:
    va beach,va
    Home Page:
    Knock sensor wires are known to chafe and act up. Could be injector although not sure if that will throw many codes. Could happen I guess if the air fuel ratio gets out of whack. You could always swap front and rear coils and see if the issue follows to cross that off the list of possible issues.

    https://www.ecoboostperformanceforum.com/index.php/topic,3824.0.html
     
    SM105K likes this.
  13. Marshall Madison

    Marshall Madison New Member

    Joined:
    Jul 2, 2019
    Messages:
    11
    Likes Received:
    0
    Gender:
    Male
    Location:
    wisconsin
    The misfire codes are for cylinders 1,2, and 3
     
  14. luigisho

    luigisho SHO Member

    Joined:
    Nov 2, 2001
    Messages:
    8,833
    Likes Received:
    1,817
    Location:
    va beach,va
    Home Page:
    Those are all along the firewall side of the engine. I would swap the coils and hope the codes switch to the front. That would at least let you know whether one is causing all the trouble. That's the easy stuff first method of shade tree wrenching. Then look at the knock sensor wiring and see if any got rubbed and exposed. If neither then stomp your feet and throw a $h!+ fit
     
  15. Isaiah

    Isaiah New Member

    Joined:
    Aug 27, 2019
    Messages:
    3
    Likes Received:
    0
    Gender:
    Male
    Location:
    Park Forest, IL
    My car was doing something similar, it ended being an ignition coil.
     
  16. Isaiah

    Isaiah New Member

    Joined:
    Aug 27, 2019
    Messages:
    3
    Likes Received:
    0
    Gender:
    Male
    Location:
    Park Forest, IL
    As long as flash it back to stock, they can’t tell.
     
  17. SM105K

    SM105K Land Yacht Pilot Supporting Member

    Joined:
    May 3, 2018
    Messages:
    2,303
    Likes Received:
    2,217
    Gender:
    Male
    Occupation:
    Paper Slayer
    Location:
    Arizona
    Yes they can. The CPU tracks how many times it has been flashed.
     
  18. Isaiah

    Isaiah New Member

    Joined:
    Aug 27, 2019
    Messages:
    3
    Likes Received:
    0
    Gender:
    Male
    Location:
    Park Forest, IL
    I doubt they will check it though for a misfire. Maybe if he blew the motor etc.
     
  19. SM105K

    SM105K Land Yacht Pilot Supporting Member

    Joined:
    May 3, 2018
    Messages:
    2,303
    Likes Received:
    2,217
    Gender:
    Male
    Occupation:
    Paper Slayer
    Location:
    Arizona
    Depends on the dealership honestly. My Ford dealership doesn't give a crap but others do.
     

Share This Page

If you wish to help keep SHOforum running, please click the donation button below