ShawnPreece Posted November 20, 2014 Share Posted November 20, 2014 My speedo needle doesnt work properly. If im going at say 40mph it would be rapidly bouncing from 30-50mph (always at least a 20mph difference) I also have a HKS type 1 turbo timer which displays the speed digitally and this works brilliantly and very accurate so because the turbo timer speed reads correct I thought it must have been a fault on the speedo within the dials cluster so I bought another dials cluster and put that in but im still getting the same problem... just wondering if anyone has come across this before and what possible causes are? Im planning to look into it tomorrow but just wondering where to start looking really. My only thoughts are whether its the converter box that converts it to mph rather than kph as thats loose in the dash just behind the dials or whether its a wiring issue somewhere. Quote Link to comment Share on other sites More sharing options...
SupraLEDrears Posted November 20, 2014 Share Posted November 20, 2014 Mine is connected to the back of the dials. Might be as simple as a loose screw making it bypass the converter shooting up to 50, then making contact and converting to mph again? Quote Link to comment Share on other sites More sharing options...
LOGIE Posted November 20, 2014 Share Posted November 20, 2014 Sounds like the speed sensor itself on the gear/autobox Quote Link to comment Share on other sites More sharing options...
ShawnPreece Posted November 20, 2014 Author Share Posted November 20, 2014 Mine is connected to the back of the dials. Might be as simple as a loose screw making it bypass the converter shooting up to 50, then making contact and converting to mph again? Thanks for your response, yeah mine is connected as the picture below: all the screws seem to tighten up nicely though so dont think it would be that, one of the wires coming out of the converter box has been bent over quite tightly though and is a little worn so was wondering if that might of been it but still looks to be connected properly Quote Link to comment Share on other sites More sharing options...
mellonman Posted November 21, 2014 Share Posted November 21, 2014 it will be the speed sensor on the gear box mine dis this when i had the box in and out a few times , check its tight and not got wet Quote Link to comment Share on other sites More sharing options...
T14PPA Posted November 21, 2014 Share Posted November 21, 2014 My car does this and it happened when i put in the speed converter. So im guessing its a faulty converter. Will watch this thread to see how you fix yours before i get another converter or speed sensor Quote Link to comment Share on other sites More sharing options...
ShawnPreece Posted November 21, 2014 Author Share Posted November 21, 2014 Ahh right thanks il give the sleep sensor a check, cheers Quote Link to comment Share on other sites More sharing options...
Rob W Posted November 21, 2014 Share Posted November 21, 2014 Mine was doing the same. Changed my speedo to a UK spec so got rid of the converter and no more issues. That's where I'd start first personally, but as said the box sensor would do the same thing. Quote Link to comment Share on other sites More sharing options...
keron Posted November 21, 2014 Share Posted November 21, 2014 More likly could be a faulty speedo converter too. Try disconnect it, put the wiring back to stock and check... Quote Link to comment Share on other sites More sharing options...
ShawnPreece Posted November 21, 2014 Author Share Posted November 21, 2014 Ahh ok thanks il try both out, thinking about it iv had a new clutch put in so obviously the gearbox was off and it was doing it before that too so I would think maybe it is the converter yeah but il try both, thanks for all your help guys Quote Link to comment Share on other sites More sharing options...
supra_ufo Posted November 21, 2014 Share Posted November 21, 2014 I have the same issue but mine doesnt work at all now I took the speed converter out and wired it "back to normal" but it doesn't work so i need to source a sensor for the box. Quote Link to comment Share on other sites More sharing options...
ShawnPreece Posted November 22, 2014 Author Share Posted November 22, 2014 I have the same issue but mine doesnt work at all now I took the speed converter out and wired it "back to normal" but it doesn't work so i need to source a sensor for the box. Ahh right yeah that sounds similar as mine goes through little temporary spells of not working but generally it just bounces, just sourcing a new converter box atm to give that a try as thinking on mine it may be that from the advise on the comments above as it's been doing it all along and my gearbox has been off and back on during that time and no change to it, unless the speed sensor is faulty as appose to being loose though Quote Link to comment Share on other sites More sharing options...
ScottC Posted November 22, 2014 Share Posted November 22, 2014 (edited) Ahh right yeah that sounds similar as mine goes through little temporary spells of not working but generally it just bounces, just sourcing a new converter box atm to give that a try as thinking on mine it may be that from the advise on the comments above as it's been doing it all along and my gearbox has been off and back on during that time and no change to it, unless the speed sensor is faulty as appose to being loose though The easiest way is to just remove the old convertor and see if it works correctly and reads in KPH. No point buying another one until you know its faulty. Edited November 22, 2014 by ScottC (see edit history) Quote Link to comment Share on other sites More sharing options...
2Poor4mySupra Posted January 16 Share Posted January 16 Resurecting this post because mine is doing this. I have a video. Mine is also converted to MPH... How/where do i remove the converter? https://streamable.com/lhuck2 Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted January 17 Share Posted January 17 Its probably going to be behind the cluster. I still maintain converters are a needless complication, just learn 4 numbers Quote Link to comment Share on other sites More sharing options...
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