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  1. #1

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    2019 RXPX 300-Rough idle after installing parts

    I did the JL ECU 8400rpm tune at 7 hours but didnít really start to fully see benefits till 15 hours when my speedo would read 76-77 consistently. I put on a Riva intake, ribbon delete, header spacer and pump wedge last week and first time out was tough. The ski didnít want to idle was all over the place and was knocking if idling but if on throttle wasnít as bad. I cruised 20-30 minutes thinking the ski would adjust to mods but didnít. Cruising back to my house the ski wouldnít go over 35mph or 5300 rpm. Aside from the codes and rough idle holy geez did this thing wake up. I was cruising 75mph like nothing and still had throttle left but didnít want to bang on it to hard since I knew something wasnít right. Here is dash pic of 77mph with tune only then idling video. Please offer me any advice or point me in the right direction of someone who can get this figured out. All the parts I bought are what was recommended to me to use with this tune.
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  2. #2

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    Uploaded video to youtube

  3. #3
    SplishSplash's Avatar
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    Could be an exhaust leak inside the hull, That will cause a rough idle and no power as you did touch the exhaust.
    Could be a cracked intake manifold or some damage from the ribon delete, or vaccum leak.
    Did you remove the map sensor while doing the ribbon delete? Is it connected? I would think so or it would throw a code.

    You say it would not go over 35 mph or 5300 and in the next line you say it would go 75 with lots of throttle left. Confused.

  4. #4

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    Oh and it through codes PO 106, UO 129, UO 400

  5. #5
    DR2006RXP's Avatar
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    Did you try calling JL for support ???

  6. #6
    www.eastcoastpwc.net Scott's Avatar
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    Map sensor plugged in?

  7. #7

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    Quote Originally Posted by DR2006RXP View Post
    Did you try calling JL for support ???
    yes called Julio he said he thinks itís the air intake harness, is it possible I need a 2 bar map?

    Yes while I was testing it out it ran 75mph with plenty of throttle left but after 30 minutes of riding when I was cruising back to my house it wouldnít go over 35mph or 5300 rpm. I was just cruising then hit it and nothing, thatís when I took seat off at my dock and made video to show how it sounded and was running.

  8. #8
    moparguy's Avatar
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    Vacuum leak, check the oring around the plug for IMUK may be pinched

  9. #9

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    Not sure if these are any help
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  10. #10
    www.eastcoastpwc.net Scott's Avatar
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    Do you have a way to reset the throttle body?


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