Replacing spark plugs

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by avoice217, Dec 19, 2025.

  1. CR94

    CR94 Senior Member

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    Couldn't unequal clogging of EGR ports of the manifold be a plausible culprit for "starting to shake while ... accelerating", even if the head gasket is ok?
     
  2. ChapmanF

    ChapmanF Senior Member

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    As I understand things, shakes on initial startup, after sitting for a while, and quickly clearing up, would cast suspicion on the head gasket.

    Shakes while driving, if they are not present at idle and not present at full throttle, but show up at moderate loads when EGR is used, would cast more suspicion on the manifold EGR passages, and wouldn't be very consistent with a head gasket problem.
     
  3. avoice217

    avoice217 Member

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    Hey guys, let me put everything back together and take it for a drive. I certainly hope that its not the head gasket, but we shall see. I did notice at least 1 of the small holes clogged inside the intake manifold, so tomorrow I'm going to put the intake manifold back into the car and see how things go. I'm also going to inspect the pcv valve while I have to intake manifold out. I did watch a video on how to interpret the sound on that.
     
  4. ASRDogman

    ASRDogman Senior Member

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    You might as well replace the pcv valve while it's out. It's $10-15 part. And not fun
    to get it with the intake manifold on.....

     
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  5. avoice217

    avoice217 Member

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    Hey all, so heres the current situation: I'm working on trying to put the car back together. However, there's a few hoses that I'm not sure of the location. I've tried finding pdf's of diagrams regarding the location and can't seem to find them. As soon as I plug all the hoses back into place, then the rest of the car will get put back together.
     

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  6. avoice217

    avoice217 Member

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    Hey all so this is where I am at currently. I've been able to find most of the hose locations. However, I'm having a difficult time finding the hose that goes here.
     

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  7. indel

    indel Member

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    Look for a coolant hose that's hanging unattached.
     
  8. avoice217

    avoice217 Member

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    Yes so for the coolant hose thats hanging unattached, unfortunately I can't seem to find where it's supposed to go. I've looked all around and have no idea where it's supposed to go back to. For the metal pipe that doesn't have a hose attached, the only information I have refers to a half part number, which is 16267. Problem there is that there's many Toyota parts with that first half, so that doesn't help.
     
  9. indel

    indel Member

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    Can you post a zoom out picture so we can see what the metal tube is attached to? It looks to me like the EGR cooler coolant port. Also, take a look at page#2 of the attached diagram. It might help you figure out what's missing.
     

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    #49 indel, Jan 13, 2026 at 7:27 PM
    Last edited: Jan 13, 2026 at 7:33 PM
  10. avoice217

    avoice217 Member

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    So based on the diagram that you should, its the larger hose coming out of the egr cooler. However, I'm not getting any help from Google on that.
     
  11. indel

    indel Member

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    There should be four coolant hoses attached to the cooler. You have one missing. You may have attached it to something else.
     
  12. avoice217

    avoice217 Member

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    As you requested, here's zoomed out photos of those areas.
     

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  13. rjparker

    rjparker Tu Humilde Sirviente

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  14. avoice217

    avoice217 Member

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    Hey rjparker, so I looked it up and found the hose. However, the split at the end I honestly dont remember.
     
  15. avoice217

    avoice217 Member

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    Now any ideas where the hose that's connected to the green clamp goes by chance? I've been looking constantly and can't seem to figure out where to put that.