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High RPM idle with HID

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  • High RPM idle with HID

    Noticing car is idling @ higher RPM when HIDs are turned on and left on. Jumps from 600RPM to almost 1K RPM and stays like that.

    Is this normal?

  • #2
    No. What car? Do you have relay harness?

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    • #3
      10th gen civic
      no relay harness

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      • #4
        sounds like that kit or installation is really draining the system, causing the alternator/engine to kick into higher RPM to compensate. Not normal, not really no

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        • #5
          I would remove whatever you've installed in case it damages something. I've never had idle jump and OE systems don't do that.

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          • #6
            That's pretty unheard of. What kit did you install? Try a relay harness, but you may have a defective kit.

            2000 Toyota MR2 Spyder
            2017 Lexus CT200h F Sport

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            • #7
              hylux ballast, CN light, both from ebay.
              here's a video, HID turned on @ 15 second mark (already warmed up):

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              • #8
                Bump
                Any input please?

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                • #9
                  Not normal at all , are your ballasts 35 watt or 45 watt ? I would definatly install a relay harness .
                  I can turn on 3 sets of 45 watt ballasts and 2 high powered light bars , and my idle doesn't increase at all

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                  • #10
                    an update: put halogens back in and car still revs high when headlights or highbeams turned on (in park)..
                    so it's not the HIDs...

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                    • #11
                      Car is too new to have issues like that. Take it to the dealer

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                      • #12
                        It barely increased from 750 rpm to 800.

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                        • #13
                          Hahahaha I just watched the video, looks like the thermo fans kicked in, or aircon if you had that running. Like Puneet said, barely increased. Nothing wrong there.
                          Load on alternator = ECU bumps the idle a little.

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