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High idle rpm

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Ohid, Aug 21, 2022.

  1. Ohid

    Ohid Member

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    My Prius Alpha 2015, Now 101k km.

    Its idle rpm around 1300 whereas it was around 1000 rpm before. I cleaned intake manifold and egr tube 2 months ago. After cleaning intake, its idle rpm increased to 1300 rpm. Whats the reason you guess?

    I attached photos with AFR, throttle, Oxygen voltage, vacuum, MAF value. Should I suspect vacuum leak?

    Your suggestions please.
     

    Attached Files:

    #1 Ohid, Aug 21, 2022
    Last edited: Aug 21, 2022
  2. bisco

    bisco cookie crumbler

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    are you sure everything is plugged back in? all gaskets in place?
     
    #2 bisco, Aug 21, 2022
    Tim Jones likes this.
  3. Ohid

    Ohid Member

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    Yes, I am sure everything is plugged back. Only three gaskets one is steel gasket attached to the egr pipe and another two is rubber gaskets attached to the intake.
     
    #3 Ohid, Aug 21, 2022
  4. Tim Jones

    Tim Jones Senior Member

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    You goofed something up. It's the only way......sounds like vacuum leak....... or plug......need to make tripple sure I'll bet you missed something.
     
    #4 Tim Jones, Aug 23, 2022
  5. Ohid

    Ohid Member

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    Sure, I will check at weekend.
     
    #5 Ohid, Aug 24, 2022
  6. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    I will get high idle for a few moments, the next few start-ups after a 12 volt battery disconnect (typically before doing brake work). I suspect it's the car's computers running some calibration thing.

    Don't think that's your exact issue, if this high idle is ongoing, but maybe it's stuck in some calibration thing.

    Try a battery disconnect, say disconnect the neg cable for a minute.
     
    #6 Mendel Leisk, Aug 24, 2022
  7. CR94

    CR94 Senior Member

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    ?? My car normally idles at 1280 RPM when cold (and when it pretends to be cold after a hot restart). What were the circumstances when you previously saw 1000 RPM?
     
    #7 CR94, Aug 25, 2022
  8. Ohid

    Ohid Member

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    Thanks, I will check again all the hoses and switches are well connected soon. If problems persists, I will disconnect 12v battery.
     
    #8 Ohid, Aug 26, 2022
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  9. Ohid

    Ohid Member

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    Most of the time it was around 1000 before cleaning intake manifold and egr pipe. During cold, it barely fall below 13°C.
     
    #9 Ohid, Aug 26, 2022
  10. Joele3

    Joele3 Active Member

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    I've noticed this as well. Ice will stay running, slam on gas slight hesitation. Almost like a delay in the throttle. Ice will always stay running. I will turn car off and turn back on. Return back to normal. Ice shuts off no delay in throttle. I was thinking EGR plugged up. I cleaned EGR and intake. Not an oil burner EGR cooler was not bad at all and intake no plug ports just the normal oily residue. I also put a new battery the larger one that fits in the V.

    Its not all the time it happens but once in awhile. I will notice because ice will always run. I'll try cleaning MAF and throttle body. Unplug battery. Im coming up on 150k water pump change is in my future.

    Has anyone noticed this after they got the recall performed for ECM reprogram on the inverter?
     
    #10 Joele3, Aug 27, 2022
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