Mechanical noise when starting engine

Discussion in 'Gen 3 Prius Main Forum' started by Steven Stolle, Jul 13, 2020.

  1. Steven Stolle

    Steven Stolle Junior Member

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    Thanks for the video link. I was able to do the necessary work based on this video. The car is running great now. On cleaning the intake manifold the vent tubes were totally clogged. I bought a bore brush to clean them out along with brake cleaner. I never imagined so much carbon was present on the surfaces. Everything went well. Thanks again!
     
  2. bisco

    bisco cookie crumbler

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    well done!(y)
     
  3. Krall

    Krall Junior Member

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    Does it sound sort of like a cooling fan hitting the shroud?
     
  4. Steven Stolle

    Steven Stolle Junior Member

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    Thanks, I fixed that part of the problem following your advice. But the car has another problem. The car runs rough at times, clears up and gets rough again. I scanned for the DTC codes, and the following codes are showing from the scan: P0300, PO301, PO302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It never had a tune-up before. It still runs rough at times. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks again for your help.
     
  5. Steven Stolle

    Steven Stolle Junior Member

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    Thanks. The video was right on.
     
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  6. Steven Stolle

    Steven Stolle Junior Member

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    Thanks. I scanned for the DTC codes, and the following codes are showing from the scan: P0300, PO301, PO302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It never had a tune-up before. It still runs rough. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks for your help.
     
  7. Steven Stolle

    Steven Stolle Junior Member

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    No. The car has another problem. I scanned for the DTC codes, and the following codes are showing from the scan: P0300, PO301, PO302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It still runs rough. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks.
     
  8. Steven Stolle

    Steven Stolle Junior Member

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    Since the cleaning a new problem has occurred. The #1 & #2 cylinders are misfiring. the DTC codes are: P0300, PO301, PO302, & PO441. I replaced all the spark plugs and ignition coils because the car has 299K miles. It never had a tune-up before. It still runs rough. I have to investigate the PO441 code. Do you have any suggestions for a remedy for this situation? Thanks.
     
  9. Raytheeagle

    Raytheeagle Senior Member

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    That code is for a large vacuum leak;).

    You sure everything was reassembled correctly and all hose connections were properly done:whistle:?

    Keep an eye on the engine coolant reservoir as you might have a head gasket failure:cool:.

    Good luck and keep us posted(y).
     
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  10. PriusGuy32

    PriusGuy32 Prius Driver Extraordinaire

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    Yikes. I have to admit, I feel like once a Gen3 owner hears the start up noises, coolant is already getting into the cylinders, and the head gasket has already been compromised. Its beyond a clogged EGR circuit/cooler at that point.....
     
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  11. ttou68

    ttou68 Active Member

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    Perhaps this could help.. also, you may want to check PCV valve, if you haven't cleaned it or replaced it recently..


    Toyota Parts | P0441 Diagnostic Code - Trouble Code Diagnosis Guide
    Toyota Parts | P0441 Diagnostic Code - Trouble Code Diagnosis Guide
    Posted via the PriusChat mobile app.
     
  12. Steven Stolle

    Steven Stolle Junior Member

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    I meant to get back to you sooner. I found a loose vac hose and securely connected it. The engine started right up and ran smoothe for about 3 minutes then shut down with a dashboard display read - CHECK HYBRID SYSTEM. The scanner reads a P3190 code. I cleared the DTC code and started the engine a second time. It runs for about 1 minute then shuts down again with the same DTC code and display readout. What can be wrong with it now? I don't have a clue. Thanks for your help again.
     
  13. Raytheeagle

    Raytheeagle Senior Member

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    How much gas do you have in the Prius?

    Did you clean the MAF sensor?

    How'd you reset the code?
     
  14. ChapmanF

    ChapmanF Senior Member

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    P3190 : the engine is running, but producing less than 20% of the target torque. The process to diagnose is not very hybrid-specific, just all the usual stuff you would look at if a gasoline engine were bogging down and producing minimal power. There are about nine pages of workup for that code in the repair manual, which could help for getting ideas.
     
  15. mjoo

    mjoo Senior Member

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    I had startup noises at 69K. After the EGR, intake manifold and PCV valve cleanse plus adding an OCC - no more startup bang. Engine coolant holds steady. Stay on emptying the OCC or it will come back. 96k miles now
     
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  16. Steven Stolle

    Steven Stolle Junior Member

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    I have a full tank of gas. I cleaned the MAF with MAF cleaner. I reset the DTC with a hand scanner.
     
  17. Raytheeagle

    Raytheeagle Senior Member

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    What if you pulled the 12 volt lead and try a hard reset;).

    Give that a shot and see if it works(y).
     
  18. Steven Stolle

    Steven Stolle Junior Member

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    Should I replace the MAF with a new one? The only code showing is the P3190 code. What about the O2 sensor? Does that affect the P3190 reading? I could clean it or replace it. Other than those two items I can't figure else what to look for. Logically, there must be something else affecting the engine. Just short of a bad ECM.
     
  19. Steven Stolle

    Steven Stolle Junior Member

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    Okay on that. I'll do that first. I'll let you know the result. Thanks.
     
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  20. Steven Stolle

    Steven Stolle Junior Member

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    I disconnected the 12v battery cable and waited 5 minutes before reconnecting it again. The engine started and ran for about 2 minutes then shutdown again with the same readout as before but with a strong smell of fuel. CHECK HYBRID SYSTEM. So there is something else in the system that is generating this trouble code. Could it have to do with the air/fuel ratio because of the smell of fuel? Or worse, is it the hybrid battery? What are your thoughts on this?
     
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