Rovergauge help
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Thread: Rovergauge help

  1. #1
    FRESHMAN ROVER 1reddog48's Avatar
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    Rovergauge help

    So I got my Rovergauge setup all ready to go, but....

    It's loaded, comes up fine. Plugs in , hit connect, red light flashes, no reading on Rovergauge. I'm still running 13CUX (1988 YM RRC).
    Any tips? Everything seems plugged in fine and all. Thinking about going to 14CUX as advised, but it's my understanding I should be able to read a 13CUX ECU with Rovergauge.
    Thanks in advance!
    Doug in Friday Harbor

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  3. #2
    FRESHMAN ROVER
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    Re: Rovergauge help

    Quote Originally Posted by 1reddog48 View Post
    So I got my Rovergauge setup all ready to go, but....

    It's loaded, comes up fine. Plugs in , hit connect, red light flashes, no reading on Rovergauge. I'm still running 13CUX (1988 YM RRC).
    Any tips? Everything seems plugged in fine and all. Thinking about going to 14CUX as advised, but it's my understanding I should be able to read a 13CUX ECU with Rovergauge.
    Thanks in advance!
    The 13 and 14CU can't normally connect to Roverguage, only the 14CUX. I believe one of the grounds are different on the 14CU vs the X but no clue about the 13CU.

  4. #3
    FRESHMAN ROVER
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    Re: Rovergauge help

    The flapper system doesn’t offer a diagnostic fault code facility like Hotwire does


    Sent from my iPhone using Tapatalk
    1985 3.5 V8, Converted to Serpentine and 14CUX. EAS and BW Tbox

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  6. #4
    FRESHMAN ROVER
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    Re: Rovergauge help

    Quote Originally Posted by rangerovering View Post
    The flapper system doesn’t offer a diagnostic fault code facility like Hotwire does


    Sent from my iPhone using Tapatalk
    13CU is early hotwire with the Hitachi MAF.

  7. #5
    FRESHMAN ROVER 1reddog48's Avatar
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    Re: Rovergauge help

    Update:
    Got new speed transducer today. Kind of a pain to install, but what's new...? Test drove it and no difference....dang!
    I did bench test it with a drill and an ohmeter and the old one sent out a pulsing resistance while the new one was smooth. Hmmmm.
    Current symptoms are:
    Starts well, revs thru full RPM range while stationary.
    Takes off and accelerates up to around 15-1600 rpm and 15-20 MPH, then starts bucking at a rate of about 2 bucks per second, very cyclically, while under acceleration. Let off and it will quit, try to accelerate and over a certian speed, right at 15-1600 RPM, the bucking starts again.
    Pull over, disconnect the speed transducer and it will drive basically fine, but the exhaust smell tells me the fuel mapping has gone very rich.
    As stated earlier, I now have Rovergauge, but it is not communicating. Checked install several times, all that seems fine, I get the red flashing light but not the green one. THought about switching to my back-up ECU, but Rover Guru shop seems to have kept it. Dang...!
    So at this point I'm going to install Rover gauge in another computer (Windows 7 instead of XP) and see if that changes anything.
    Also getting ready to pull the trigger on a 14CUX ECU, especially if anyone will second that move.
    Driving my crazy, several dollars at a time....
    Doug in Friday Harbor

  8. #6
    FRESHMAN ROVER
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    Re: Rovergauge help

    Rovergauge isn't going to work normally, don't waste your time.

    Either it's your O2s, dying MAF, cam, a cracked intake tube or your ECU is just dying.

  9. #7
    FRESHMAN ROVER
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    Re: Rovergauge help

    I would suspect an ECU fault, disconnecting the speed transducer will force it to run a get Home map which is why it’s running rich (cat protection). If you can fit a spare ECU that would be my starting point.




    Sent from my iPhone using Tapatalk
    1985 3.5 V8, Converted to Serpentine and 14CUX. EAS and BW Tbox

  10. #8
    FRESHMAN ROVER
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    Rovergauge help

    Quote Originally Posted by xalt View Post
    13CU is early hotwire with the Hitachi MAF.
    My mistake, we didn’t get that option in the UK, it was flapper then 14CUX

    Rover gauge will only work with 14CUX as the earlier ECU’s done have the diagnostic capabilty


    Sent from my iPhone using Tapatalk
    1985 3.5 V8, Converted to Serpentine and 14CUX. EAS and BW Tbox

  11. #9
    FRESHMAN ROVER 1reddog48's Avatar
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    Re: Rovergauge help

    I have a 14CUX on order, my hopes for success are high.

    I have read that there is a "kill-joy" function in the programming where "if the ground speed exceeds a certain point, the vehicle will cease to accelerate". If this is true, then there is some sort of governor built into the programming that might have gone wonky. Has anyone ever heard of this "kill-joy" function?
    Doug in Friday Harbor

  12. #10
    SENIOR ROVER
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    Re: Rovergauge help

    Quote Originally Posted by 1reddog48 View Post
    I have a 14CUX on order, my hopes for success are high.

    I have read that there is a "kill-joy" function in the programming where "if the ground speed exceeds a certain point, the vehicle will cease to accelerate". If this is true, then there is some sort of governor built into the programming that might have gone wonky. Has anyone ever heard of this "kill-joy" function?
    yes it does exists and it is on the transducer circuit, if it exceeds 35 mph in low range it cuts 4 odd cylinders and sets misfire codes for cyl's 1,3,5,7.
    I have had it fail on high gear while merging on highway or loading engine.

  13. #11
    FRESHMAN ROVER 1reddog48's Avatar
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    Re: Rovergauge help

    Quote Originally Posted by 95classiclwb View Post
    yes it does exists and it is on the transducer circuit, if it exceeds 35 mph in low range it cuts 4 odd cylinders and sets misfire codes for cyl's 1,3,5,7.
    I have had it fail on high gear while merging on highway or loading engine.
    What failed and how did you resolve the issue? Speed transducer or did it think it was in low range?

    So, where to go from here?
    1) speed transducer is good.
    2)unplug it and rig travels fine (at least no cutout), so signal is getting to ECU
    3)No light on dash to tell rig it's in low range, does the signal to the ecu come from the same switch or is it a different switch? If different, where is it? Perhaps a bad ground at that switch or bad wire/connection??
    4) Are we back at a corrupt interpretation of a good signal to the ECU and this is causing the issue? Keeping in mind that this has happened before and I have switched out ECU's with no joy to be had.
    Doug in Friday Harbor

  14. #12
    SENIOR ROVER
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    Re: Rovergauge help

    I spoke with technical advisor of autologic diagnostics, after much testing and back and forth diagnostics the solution turned to be a defective speed sensor/transducer. unfortunately, they cater to shops only.
    I believe up to model year 90 land rover used a resistor the size of a chicklet for emissions purposes, this was based on market. its described in detail on the rave. this has caused issues as well.

    call atlantic british, ask to speak with Douglas he is their master technician and advisor, not sure how far his experience extends with older models but he may have a solution.

    seems you're covering all your bases and still return to the same issue. is your transducer a good know unit or a new replacement?
    the signal wire senses the pulses and based on this interprets speed thus governs the vehicle. the failure, no matter whether hi or low vehicle though it was on low and moving too fast thus would govern speed and engine rpm.

    I have a few friends with whom we brainstorm on problem children, let me review all your posts and make notes so I can pick their brains.
    may take a little longer but I will get back to you either way, good or not.

  15. #13
    FRESHMAN ROVER 1reddog48's Avatar
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    Re: Rovergauge help

    95CLWB,
    Thanks for all the replies and input. The transducer is new. I tested it with a drill prior to install and got a smooth increase in ohm readings between the 2 wires as the drill speed increased. I am fairly sure it is fine.
    Thanks for talking it up with your brain trust. This one is a real heartburn and makes me want to sell the beast. I keep thinking someone will chime in and say "Hey, that happened to me, this fixed it", but other than the thread where the guy unplugged his transducer from his V8 MG, I can't find any other mention of then causing issues (other than your story of course).
    Well, at least we have something to talk about if holiday family conversation turns to politics....
    Doug in Friday Harbor

  16. #14
    FRESHMAN ROVER 1reddog48's Avatar
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    Re: Rovergauge help

    " the failure, no matter whether hi or low vehicle though it was on low and moving too fast thus would govern speed and engine rpm."
    Well, I'm fairly sure the signal is good, and since the transducer seems to be a switch that is operated by a rotating magnet that simply opens and closes, and unpluggin it ceases the bad behavior, I conclude the wiring is OK (a broken wire would be the same as unplugging it, a shorted wire would make the bad behavior continue even with the transducer unplugged...right??)
    I keep coming back to bad ECU or bad switch that tells the ECU the rig is in low range.
    Odd that it comes in right at 1500 RPM regardless of ground speed, if it's the governor, that's not many RPM to get you out of a mud hole or up that steep trail...
    Doug in Friday Harbor

  17. #15
    SOPHOMORE ROVER
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    Re: Rovergauge help

    ECU does not care what range you are in. There is nothing telling it. It gets speed from transducer & rpm via coil with the chiclet resistor inline. Have you tested the coil?
    Kevin
    88 RRC "Audrey"

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