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Runs rough after EGR cooler clean

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by mattbatson, Jul 23, 2019.

  1. mattbatson

    mattbatson Member

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    2011 with 150k miles

    Just bought the car

    Cleaned the cooler...following along with the nutzaboutboltz video

    Got it all back together except for the wiper tray as I wanted to make sure it ran

    Started it up and engine is running pretty rough

    Should I just keep idling it till it clears up?

    Went over electrical connectors and everything and it all seems to be reassembled correctly
     
    #1 mattbatson, Jul 23, 2019
  2. mattbatson

    mattbatson Member

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    Oh I also did the plugs

    But that was really straightforward

    All seems fine
     
    #2 mattbatson, Jul 23, 2019
  3. mikey_t

    mikey_t Active Member

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    Did the rough idling clear up? I remember when I started mine after putting it all back it was rough for a minute then calmed down. I think it was from the coolant recirculating and air pockets being pushed around and out.
     
    #3 mikey_t, Jul 23, 2019
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  4. JC91006

    JC91006 Senior Member

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    Did you plug back all the connections? If you cleaned the maf sensor and throttle body, you'll need to reset your 12v battery
     
    #4 JC91006, Jul 23, 2019
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  5. mattbatson

    mattbatson Member

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    Ok
    I’ll try disconnecting and reconnecting the battery

    All connectors seem correct
     
    #5 mattbatson, Jul 23, 2019
  6. mattbatson

    mattbatson Member

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    I was thinking the same
    Lost a little coolant

    But refilled the reservoir and left the cap off

    Was going to get it up to operating temp and make sure any air pockets bled out

    But was uncomfortable leaving it running in case I would cause damage
     
    #6 mattbatson, Jul 23, 2019
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  7. mjoo

    mjoo Senior Member

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    Any codes?

    Pixel XL ?
     
    #7 mjoo, Jul 23, 2019
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  8. 4est

    4est Active Member

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    Maybe you are losing compression through the improperly tightened spark plug
     
    #8 4est, Jul 24, 2019
  9. mattbatson

    mattbatson Member

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    Thanks everyone for your responses I had noticed after letting it sit overnight when I started it in the morning that it was idling slightly less rough

    so right away I figured that it was just trying to blow brake cleaner and so forth out

    so I let it continue idling and sure enough it cleared up after about five minutes
     
    #9 mattbatson, Jul 24, 2019
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