Engine performance on top speed

Discussion in 'Gen 3 Prius Main Forum' started by Imrand, Mar 9, 2020.

  1. Imrand

    Imrand New Member

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    Hello everyone i need assistance i own gen 3 2011 for past 16 months it was ok till a month ago. I was on highway and speed was 180km/h its top speed as i have JDM version. Suddenly i had to reduce speed and I felt power loss after that day till now I can’t cross 165km/h what ever i do. Ni error code performance is excellent till 140 after that its very hard for engine to push. there is an other problem some times I notice my engine gets very hard as i have to too push gas and some time its very light. Suggestion please what should i do ?
     
  2. StarCaller

    StarCaller Senior Member

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    why is the jdm version slower than the regular one?
     
  3. Imrand

    Imrand New Member

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    All jdm are limited to 180km/h they do not allow above this speed. Now help in my problem
     
  4. bisco

    bisco cookie crumbler

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    Bad head gasket?
     
  5. Grit

    Grit Senior Member

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    Thought I was demanding heh.
     
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  6. TMR-JWAP

    TMR-JWAP Senior Member

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    So 180 kph is about 112 mph for those of us on this side of the big water.
    and 165 is around 103?

    How long was the car running at 180kph when it started getting weak? Did the check engine light or any warning light come on?

    If it still feels normal up to about 140, I would look at items that would limit it on the top end. That would be fuel flow, air flow or ignition timing. Possibly (remote) even some type of failure in the exhaust system that's preventing full flow.

    I would imagine, that if it was a head gasket, at that amount of rpm/load, it would be spewing coolant out of the overflow tank or spewing heavy vapor from the exhaust. (at least that's what would happen on older engines)
     
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  7. Imrand

    Imrand New Member

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    It looks perfectly fine.
     
  8. Imrand

    Imrand New Member

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    Thanks for ur reply i will check it for sure but as per my check list. I already cleaned catalytic 2nd i am going to replace spark plugs. Also egr pipe is in my mind too as it was also pending during my last service. If still not resolved then i will go for gasket. Open for suggestions if any other important thing missing. One important thing one of my battery cell is also bad that is also in my target list to be replaced.
     
  9. Grit

    Grit Senior Member

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    How did you determine that?
     
  10. bisco

    bisco cookie crumbler

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    x ray glasss
     
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  11. Imrand

    Imrand New Member

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    ☹️You are right but please check as i said above I want to check egr pipe few days back i cleaned up exhaust manifold but egr pipe was pending but it was also in bad condition 2nd is plugs. Will it be help full or i go straight to gasket ?
     
  12. StarCaller

    StarCaller Senior Member

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    just drive it & check your coolant level once in awhile /
     
  13. Imrand

    Imrand New Member

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    As my understanding’i could be wrong’ gaskins should start producing overheating
     
  14. Imrand

    Imrand New Member

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    Coolant level is perfectly fine up to mark and no issue.
     
  15. Mendel Leisk

    Mendel Leisk Senior Member

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    How many kilometers on it?

    Have to say, 180 kmh is about 100 kmh faster than I ever go, lol.
     
  16. kc5dlo

    kc5dlo Active Member

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    Won't do 180 KPH? Sounds like everything is bad. You need a different car.
     
  17. Imrand

    Imrand New Member

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    Well i got it fixed. Let me tell u wht i did, i cleaned EGR pipe which was blocked. And also replaced 2 cell in my HV battery pak.
     
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  18. bisco

    bisco cookie crumbler

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    well done!(y)
     
  19. Mendel Leisk

    Mendel Leisk Senior Member

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    To unblock the EGR air flow, you need to thoroughly clean all the highlighted items shown here:

    upload_2020-3-28_7-28-2.png

    Hopefully that's what you've done? If not let me know, I can post some info and links.
     
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