So I was driving and my speedometer stopped working, then s**t started shutting off...okay, its my alternator...then i changed it out and the car started right up. I get in to drive it, and i take off and the speedometer is TWEAKING out..its going from like 5mph to 40 to 35, just all over the place....so Anyone have any idea what that might be from? And another this is that since i changed the alternator, when the car is warm is revs from like 1000 to 1700 up and down constantly....any help would be great! Oh and before the alternator died everything was fine.
speedometer goin crazy!!
- Thread starter forcdincivic
- Start date
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right below your battery on your tranny is your speed sensor check that out. maybe poor some water on it and see it the water will patch a missing link in the electrical connections. trust me it should work mine did the same. or just maybe try disconecting your battery and clear the cels on you ecu maybe it is just a code from the atlenator.
So disconnect the battery and reset the ECU??
disconecting the battery will reset the ecu. you will have to leave the cables off for like 10-20min, or if you know where the ecu is (behind kick panel on passenger side below dash and infront of door). pull the panel off and unplug the ecu. if it still does the same try the water trick,
its probably you VSS sensor (vehicle speed sensor), it sits ontop of the tranny, same thing happened to me a few weeks ago.
yeah thats what i was thinking that it was....after my alternator went it was messed up, thanks for the replies guys. tomorrow im going to try and check it maybe reset the ecu and see,. if not im going to just have to get the speed sensor replaced....can i buy it and do it myself? (yes i am mechanically capable LOL)
yes you can replace it yourself....forcdincivic said:yeah thats what i was thinking that it was....after my alternator went it was messed up, thanks for the replies guys. tomorrow im going to try and check it maybe reset the ecu and see,. if not im going to just have to get the speed sensor replaced....can i buy it and do it myself? (yes i am mechanically capable LOL)
Ive got the same problem, Did you obtain a solution?
RonJ
Banned
Check whether 7.5A fuse 15 under the dash is blown. Test the fuse using a test light or multimeter as described here:Ive got the same problem, Did you obtain a solution?
http://www.2carpros.com/how_to/fuse.htm
my speedo problem went away after i installed a new alternator, a high output alternator at that!
and also, if your idle is too high or fluctuating you need to clean out the IAVC, i did this just the other day and it worked!
and also, if your idle is too high or fluctuating you need to clean out the IAVC, i did this just the other day and it worked!
wow back from the dead, but yes, Ron got it on the head....back when i was young and dumb I had no idea to check that...and it was the fuse. after replacing the fuse it was working perfectlyCheck whether 7.5A fuse 15 under the dash is blown. Test the fuse using a test light or multimeter as described here:
http://www.2carpros.com/how_to/fuse.htm
I had a similar issue, heres my thread on it with all of the details and what ended up being wrong.
http://www.clubcivic.com/board/showthread.php?t=176576
http://www.clubcivic.com/board/showthread.php?t=176576