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Speedometer lying

Discussion in 'Volvo Forum' started by Snailexpress, Jan 9, 2017.

Page 2 of 5
  1. Jan 12, 2017 #11
    Johny41

    Johny41 Road Train Member

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    Johny41, Jan 12, 2017
    Johny41, Jan 12, 2017
    #11
    Snailexpress and thejackal Thank this.
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  3. Jan 12, 2017 #12
    BUMBACLADWAR

    BUMBACLADWAR Road Train Member

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    Is speedometer a little erratic or steady? Yeah a Pawnshop GPS can capture your speed ($35) at Cash America.Thinking VSS (vehicle speed sensor) water and mud in it? Or company software program in ecu keeping you from speeding.
     
    BUMBACLADWAR, Jan 12, 2017
    BUMBACLADWAR, Jan 12, 2017
    #12
    Dave_in_AZ, TheRipper and Snailexpress Thank this.
  4. Jan 12, 2017 #13
    Snailexpress

    Snailexpress Road Train Member

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    I have two GPS in truck and speedometer is lying 100%. First time I catch it was in construction zone radar shows my 10mph over.
    Speedometer working properly from the morning or after long stop ignition off and it can work all day but after first stop or slow down it start lying +7 -9 mph.
    Sensor was replaced didn't help.
    If speedo is working until vehicle stop it is not a cluster.
    Looking for volvo software to check VECU.
     
    Snailexpress, Jan 12, 2017
    Snailexpress, Jan 12, 2017
    #13
  5. Jan 13, 2017 #14
    Flashdrive7

    Flashdrive7 Medium Load Member

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    I had that issue recently. I either had to read the speed off my Verizon navigator (I don't have a regular GPS) or clock myself with mile markers and my chronograph. I finally got the mechanic to fix it.
     
    Flashdrive7, Jan 13, 2017
    Flashdrive7, Jan 13, 2017
    #14
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  7. Feb 4, 2017 #15
    Snailexpress

    Snailexpress Road Train Member

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    What did mechanic to fix it?
     
    Snailexpress, Feb 4, 2017
    Snailexpress, Feb 4, 2017
    #15
  8. Feb 4, 2017 #16
    Snailexpress

    Snailexpress Road Train Member

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    some updates here.
    After VSS replacement and wires checking, connectors cleaning I have not fix this problem.
    Speedometer is working almost accurate from the morning or after long enough stop with ignition OFF and would work as long until first short stop. I start hate scale houses and red light. speedometer is lying about 10 -12 % less then real speed.
    Somehow it affects the engine performance.
    If someone can guide me what Volvo software to use for VECU reading and testing.
    Appreciate any help.
     
    Snailexpress, Feb 4, 2017
    Snailexpress, Feb 4, 2017
    #16
  9. Feb 6, 2017 #17
    123.Red Beard

    123.Red Beard Bobtail Member

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    Is your tachometer off too?
     
    123.Red Beard, Feb 6, 2017
    123.Red Beard, Feb 6, 2017
    #17
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  10. Feb 8, 2017 #18
    Snailexpress

    Snailexpress Road Train Member

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    No tachometer is OK.
     
    Snailexpress, Feb 8, 2017
    Snailexpress, Feb 8, 2017
    #18
  11. Feb 8, 2017 #19
    aussiejosh

    aussiejosh Road Train Member

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    Yeah GPS is the way to go dude i second that motion and at least you get something that shows you directions as well.
     
    aussiejosh, Feb 8, 2017
    aussiejosh, Feb 8, 2017
    #19
  12. Feb 8, 2017 #20
    123.Red Beard

    123.Red Beard Bobtail Member

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    Jan 4, 2015
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    If your tachometer works ... just remember what the speedometer is recording (when it is working) in each speed range and gear ...

    Say 55 mph = 1425 rpm in 9th gear ...
     
    123.Red Beard, Feb 8, 2017
    123.Red Beard, Feb 8, 2017
    #20
    Snailexpress Thanks this.
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