Seafoam full can in the tank, now runs bad. Can this be fixed. how?

Discussion in 'Gen 2 Prius Main Forum' started by monoshock, Mar 24, 2026 at 8:14 PM.

  1. monoshock

    monoshock Member

    Joined:
    Jul 14, 2014
    60
    26
    0
    Location:
    Rocky Top TN
    Vehicle:
    2004 Prius
    Model:
    N/A
    Well I've used seafoam for many years with no problems. However I forgot and dumped a whole can in my 2004. Now it runs weird. 210k miles. How can I fix my mistake?
     
    #1 monoshock, Mar 24, 2026 at 8:14 PM
  2. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    8,555
    4,346
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Define weird.
     
    #2 dolj, Mar 24, 2026 at 9:35 PM
  3. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    28,027
    18,537
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    That'll fix it?
     
    #3 ChapmanF, Mar 24, 2026 at 9:45 PM
  4. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    13,054
    5,304
    0
    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    How many gallons was it mixed in with/how full was tank? How many gallons have you added and how many miles since whatever "weird" means started?

    Also when was last time you replaced plugs and cleaned throttle body and MAF sensor?
     
    #4 PriusCamper, Mar 24, 2026 at 10:51 PM
(You must log in or sign up to post here.)