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2014 SCV6 LR4 CEL - accompanied by high revs (~2-3.5k) on startup

Discussion in 'LR4' started by ufcfc, May 19, 2020.

  1. ufcfc

    ufcfc Member

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    Hi good folks. Longtime reader, first time poster and all of that...

    I've had a '14 LR4 going on a year now. Maintenance wise, all I've done is change the oil so far (most recently, about 2 months and 2k miles ago). And for reference, I'm at about 83k on the clock total.

    When starting up my LR4, it has always seemed to rev up to around the 1.2-1.6k mark for 10-20 seconds, before dropping back down and idling around the 800 rpm range.

    Today when I started it up, the revs kept climbing. I curiously watched as they neared 3k for no apparent reason. Then the throttle (which I wasn't touching at all at this point) got jittery, randomly jumping and falling 100-200 rpms within that 3k range. I gave it some gas to see if that would settle it down, but no. So foot off the gas and onto the brake, and I switched it into reverse. That resulted in the engine instantly dropping back down to its normal idle (800ish).

    As I was driving I noticed in my cluster (about 5 minutes later) the solid check engine light. I didn't hear any audible tone, and it wasn't on when I pulled out of the driveway - so not sure when the CEL actually came on. I've had 3 subsequent starts since the initial incident. One was normal, and two were of the unusually "revvy" and jittery sort. Switching into R, N, or D instantly settles the engine idle to normal. The CEL has constantly remained on since I first noticed it.

    I had been meaning to buy the IIDTool for a while now, so I just went ahead and ordered it today.

    Based on many test drives and reading I did prior to purchase, I know these engines are naturally a bit noisy. But now I'm second guessing if my engine "sounds" okay. So I took a quick video of what my engine currently sounds like when it's at normal idle hoping one of you awesome people with far more knowledge and expertise than myself could give your input.

    There is definitely a bit of a rhythmic "tocking" that is maybe a bit more noticeable in person than in the video. Not sure where it's coming from, so I tried to film from a few angles.



    So my main two questions for anyone who made it this far are: (1) Does this seem okay to drive until my IIDTool arrives and I can get better info, and (2) Any idea what's actually wrong?

    Any advice is much appreciate, thanks in advance!
     
    Last edited: May 20, 2020
  2. DaytonaRS7

    DaytonaRS7 Active Member

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    while the IID tool will be benficial, any scanner will get the code that is causing the CEL to illuminate. The code may tell you something very obvious, easy to troubleshoot and fix.
    A drive to your local parts store (most scan codes for free) may help solve the problem, rather than waiting for the IID tool to arrive.
     
  3. Stuart Barnes

    Stuart Barnes Supporting Member Supporting Member

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    Where are you located? There may be someone on the forum that’s close and able to help.
     
  4. ufcfc

    ufcfc Member

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    Central FL, Tampa/Orlando area
     
  5. ufcfc

    ufcfc Member

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    Good point. I used to have a cheap scanner, but I got rid of it b/c it usually sucked. May try to run to a parts store today and see if they can pull the code for me.
     
  6. Stuart Barnes

    Stuart Barnes Supporting Member Supporting Member

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    A bit far for me being on the west coast, but good luck getting to the bottom of your issues
     
  7. Fuji4

    Fuji4 Full Access Member

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    Could be a vacuum leak, PCV valve. those go bad around 75k miles. causes high idle, although i didn't hear it in your video. Hope it is that, as they are dirt cheap. Happened to me.
     
  8. ufcfc

    ufcfc Member

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    So I made it in to AutoZone yesterday. Looks like each cylinder block is throwing a "System too lean at Idle." (odb2 P2186 & P2189).

    I have personally only ever used 93 (usually Costco). But obviously I have no idea what first owner used.

    So any recommendations for a fuel system cleaner before I consider doing the fuel injectors?

    Edit: And I also, kind of wonder why it's only an issue at start up, and is resolved after switching into any gear?

    Thanks!
     
    Last edited: May 23, 2020 at 10:15 AM
  9. avslash

    avslash Full Access Member

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    Check those PCVs and give the throttle body a good cleaning by hand before you start thinking about injectors
     
    scott schmerge and Fuji4 like this.
  10. Fuji4

    Fuji4 Full Access Member

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    Yeah. KISS principle. And the pcv is essentially a wear item. You should kind of replace it anyway.
     

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