Erratic Speedo

[Mittzy]

Went for a ride on Saturday and it pissed down rain...
After the rain I noticed the speedo was moving around a fair bit but only going up to the speed I was traveling..
Would/could this be water in the speedo itself or in the speed sensor.
I have a 2010 Roadster.

Thanks in advance

 

[1olbull]

You have wrung it's neck with too much HP!

 

[Scorp]

Thars what I was thinking, all the wheel spin

 

[HansO]

more likely sensor sender unit on bottom of motor might have got water in it

 

[TURBO200R4]

the speed sensor may have water in connector or may have metal attached to it on the inside or it may have just went bad. because of the magnetic pulses they tend to go bad and also have a habit of not working at low speeds then when u get to say 15 mph the speedo pops up and starts reading. on cars it sets a vss code and because the ecu/ecm does not know how fast the car is going it will put the trans into limp mode and will not shift.
just for laughs a dodge grand caravan has a bad 2nd gear so the computer senses the problem and puts the trans in 2nd gear then because u have a bad 2nd gear the car stops. u can turn the key off then on then u can drive until the computer sets the code.

 

[barbagris]

Went for a ride on Saturday

See? - this is what happens when you ride them.

 

[Rocket Scientist]

They can get water inside the speedo itself. I sent my bad one to DeCosse to perform an autopsie on. He said it had signs of water incursion. (damm that's a cool word)

 

[Idaho Red Rocket 3]

in·cur·sion
inˈkərZHən/
noun
noun: incursion; plural noun: incursions

1. an invasion or attack, especially a sudden or brief one.
   "incursions into enemy territory"
   synonyms: attack on, assault on, raid on, invasion of, storming of, overrunning of, foray into, blitz on, sortie into, sally into/against, advance on/into, push into, thrust into, infiltration of
   "the Confederate incursion into Mexico"

er·rat·ic
əˈradik/
adjective
adjective: erratic

1. 1.
   not even or regular in pattern or movement; unpredictable.
   "her breathing was erratic"
   synonyms: unpredictable, inconsistent, changeable, variable, inconstant, irregular, fitful, unstable, turbulent, unsettled, changing, varying, fluctuating, mutable; More
   unreliable, undependable, volatile, spasmodic, mercurial, capricious, fickle, temperamental, moody
   "the test results were too erratic for useful analysis"
   antonyms: consistent

 

[EasTexRIII]

in·cur·sion
noun: incursion; plural noun: incursions

1. an invasion or attack, especially a sudden or brief one.
   "incursions into enemy territory"
   synonyms: attack on, assault on, raid on, invasion of, storming of, overrunning of, foray into, blitz on, sortie into, sally into/against, advance on/into, push into, thrust into, infiltration of
   "the Confederate incursion into Mexico"

I can't wait to get home & ask the wife if she has proper defenses against an incursion............................

 

[Mittzy]

Hmmm.
I think I have found the issue...... Part Number T1290053
Not sure how this can get damaged???
Maybe I did the damage with my ATV jack????

Oh!!! and yes it is VERY Dirty under there.......