Thread: speedo acting up

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  1. #1 speedo acting up 
    Donating Users nascartech's Avatar
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    ok the problem i am having is that my spedo wont work all the time and it willl randomly work any ideas i know its not the sensor on the diff
    Last edited by Bio248; 09-16-2010 at 06:27 PM.
    01 GTP is3 cam 130 springs double roller 60lb injectors lq4 maf headers 4000 stall lowered
    sold 97 GTP stock
    Sold 2001 gp gt ssm90 plog dp 3.8 208 whp 265 at the crank 14.8 1/4
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  2. #2 Re: 2001 grand prix gt 
    GT Level Member mikedinthecity's Avatar
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    seems like maybe the cluster if its not the speed sensor. do u have a computer to hook up to see if it reads vehicle speed properly? if its not the speed sensor, i would say cluster. i guess it could be wiring sumwhere.....
    2000 Daytona 500 GTP. fender well intake K&N, 180 tstat, flipped dog bones, strut2strut brace, sd headers coated n wrapped, 3in dp, 3.25 pulley, pcm tune, led tails, angel eye halos w 100 watt h1s, p&p heads, p&p m90, yella terra alum roller rockers, head studs, 8mm wires, al104s, 2007 l26, 329s hd diff, alum sub frame
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  3. #3 Re: 2001 grand prix gt 
    Donating Users nascartech's Avatar
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    ya my little scanner can read mph and rpm and it att reads right but i drove all the way from work and it worked the whole way so im not sure whts going on
    01 GTP is3 cam 130 springs double roller 60lb injectors lq4 maf headers 4000 stall lowered
    sold 97 GTP stock
    Sold 2001 gp gt ssm90 plog dp 3.8 208 whp 265 at the crank 14.8 1/4
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  4. #4 Re: 2001 grand prix gt 
    SE Level Member chev1988rolet's Avatar
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    can it be a faulty ABS computer module? A while back I read online about the speedometer sensor passing through the abs before it gets to the cluster. my speedometer dont work either, been using scanner for a year now. I unplugged harness from abs and saw that some pins were burnt. I took off the cluster and gave 12 volts to some of the pins on it and the gauge would move from 0 to 110 when touching the right pins. you should borrow a cluster from a friends grand prix and see if its that. that way you wont spend money on a part you dont need.
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  5. #5 Re: speedo acting up 
    DUI BABY Bio248's Avatar
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    i changed your title so people actually cared what you were asking about.

    i cant help...
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  6. #6 Re: speedo acting up 
    The Blue One blueguy's Avatar
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    Me either but if I had to guess I'd look at the speed sensor
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
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  7. #7 Re: speedo acting up 
    Donating Users nascartech's Avatar
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    thanks bio and iy was acting up again yesterday so for the hell of it i hit the top of the dash above the speedo and it worked for a second would it be just a losse conncetion in the dash
    01 GTP is3 cam 130 springs double roller 60lb injectors lq4 maf headers 4000 stall lowered
    sold 97 GTP stock
    Sold 2001 gp gt ssm90 plog dp 3.8 208 whp 265 at the crank 14.8 1/4
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