One for the real "Technical Ted's"
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  1. #1
    Moderator Alan S's Avatar
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    Icon3 One for the real "Technical Ted's"

    Anybody got any comments on this one?
    It's certainly an interesting one, I found by the time I absorbed all the technicalities and deep and meaningful stuff, my head hurt!!


    http://www.andyspares.com/discussion...TOPIC_ID=16313


    Alan S

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    If it ain't broke, use a 12" shifter.....that usually does the trick!!

  2. #2
    1000+ Posts PeterT's Avatar
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    The voltage drop theory is the only thing that makes sense. If the battery was well and truely screwed, the alternator might have a problem maintaining 14V. So if the battery voltage/alternator is low to start with, and it gets worse further down the line, that may explain it.

    I know of cars that have "come alive" after getting a new battery, probably for the same reason.

    '92 205 Mi16
    '90 Mi16x4

  3. #3
    Moderator Alan S's Avatar
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    Someone mentioned in there about voltage drop causing the computer to drop out which I understand it does on the ECU, but on the ECU if it drops out, it can be restarted but showing the "K" light denoting a fault has occurred.
    In this case, it seems it must simply drop it all into "hard" or "sport" mode and leave it there.
    What's your take on that Peter?

    Alan S
    If it ain't broke, use a 12" shifter.....that usually does the trick!!

  4. #4
    Fellow Frogger! Ranger's Avatar
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    Quote Originally Posted by PeterT
    The voltage drop theory is the only thing that makes sense. If the battery was well and truely screwed, the alternator might have a problem maintaining 14V. So if the battery voltage/alternator is low to start with, and it gets worse further down the line, that may explain it..

    I agree, a good test would be to measure the voltage at say the cigarette lighter, turn on everything, lights, fans a/c sound system etc and test drive, switch off all non essentials note voltage improvement (if any) and check ride harshness.

    I know of cars that have "come alive" after getting a new battery, probably for the same reason.
    due to better spark no doubt.

    Ranger
    "The defendant is no gentleman, but that is neither here nor there. We find for the defendant, much as we dislike him." A.P. Herbert

  5. #5
    1000+ Posts Haakon's Avatar
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    Interesting. I can attest to froggy electrics and voltage drops. The R21 4sp auto would drop into 3rd from top whenever an electric window, or the demister, or the lighter was operated.

    One "specialist" tried to sell me a reco box as the fix, and another said the computer was fried.

    All it was was voltage drop in the accessory circut - the trans computer fuse went down to 8 volts with a load on the accessory circut, plenty enough to shut down the computer and put the trans into limp mode - ie 3rd gear.

    Relayed the trans computer fuse supply and all fixed.

    Sounds like he has similar gremlins.
    I tried to drown my sorrows in alcohol, but the bastards learnt how to swim

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