AlexKeith Posted July 22, 2009 Share Posted July 22, 2009 Hi there. I own a 1994 Imported Manual N/A supra. When i first recieved the car i found out it had a cheap old speed converter fitted near the gear box that was casusing issues (Warning lights on dash board, Speed randomly dieing etc) so it was ripped out and i ordered a THOR racing converter and de-limiter. After wireing it all up i found that my Speedo is reading alot higher than it previously was. Before it was reading in K/m on a 180MPH dash, but after fitting the converter it seems to be reading double the MPH (e.g. when im doing 30mph it now shows 60) Has anyone been haveing this issue? And is there a way to adjust the converter? Thanks in advance Alex Quote Link to comment Share on other sites More sharing options...
JustGav Posted July 22, 2009 Share Posted July 22, 2009 Have you double checked all the wiring, sounds like you have possibly connected one of the outputs incorrectly. Quote Link to comment Share on other sites More sharing options...
AlexKeith Posted July 22, 2009 Author Share Posted July 22, 2009 Would that be one of the wires going to the speedometer or odometer? As i'm not getting an engine warning light around 50 - 60 mph meaning it's wired to the ecu correctley and powered. Quote Link to comment Share on other sites More sharing options...
JustGav Posted July 22, 2009 Share Posted July 22, 2009 You wouldn't get an error signal if the ECU got a signal, whether the signal is valid or not (ie too fast/slow) wouldn't necessarily throw up an error. Did you use this wiring layout? http://www.thor-racing.co.uk/images/non_vvti_supra.jpg Quote Link to comment Share on other sites More sharing options...
Homer Posted July 22, 2009 Share Posted July 22, 2009 Where abouts in Berkshire are you Alex? Quote Link to comment Share on other sites More sharing options...
AlexKeith Posted July 23, 2009 Author Share Posted July 23, 2009 Yeah my friend said he followed it to a T but still haveing the issue, he did say there looked to be some kind adjuster on the side of it. Do you think this could be the issue? And i'm in Bracknell. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted July 23, 2009 Share Posted July 23, 2009 The adjuster is a potentiometer IIRC: basically it allows you to tweak the conversion factor if it's not quite right. Thor usually supply them pre-set to the correct value (mine was anyway). I don't know how much adjustment range the potentiometer gives you: it's possible that if it's been fiddled with, then it could be reading way out, but I thought it could only adjust +/- 10% ish. Strange that it's double what it should be: IIRC, the Thor converter spits out kph, 5/8 kph (i.e. mph), and another kph that's clipped at 110-ish mph to fool the ECU speed limiter (if you've got the DSC+TSD unit). Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 23, 2009 Share Posted July 23, 2009 You sure it doesn't have another converter on it somewhere else, still wired in? I have seen that once before, gave all sorts of weird issues. Can't recall it reading twice the speed, more like half though. Quote Link to comment Share on other sites More sharing options...
AlexKeith Posted July 23, 2009 Author Share Posted July 23, 2009 After the old converter was removed i did still seem to get the engine warning light comeing on at around 50 - 60mph, but had gone off immediatley with this install. My friend did say that the dashboard looked like it wasn't the one for the original car, would that have something to do with it? Thanks for all your help so far. Quote Link to comment Share on other sites More sharing options...
Homer Posted July 23, 2009 Share Posted July 23, 2009 As mentioned on PM, you're welcome to drop by if you want me to take a look at it. The 50-60 mph warning is normally caused by the active spoiler, a badly wired speed controller can cause it to trigger. As above it's probably just wrongly wired or has something left from a previous system Quote Link to comment Share on other sites More sharing options...
Homer Posted July 25, 2009 Share Posted July 25, 2009 Fixed, it was wired up wrong. Nice to meet you today Alex, nice car you have there. PS: And don't let your mate near the car again Quote Link to comment Share on other sites More sharing options...
tDR Posted July 25, 2009 Share Posted July 25, 2009 Fixed, it was wired up wrong. Nice to meet you today Alex, nice car you have there. PS: And don't let your mate near the car again He's a very nice man! Quote Link to comment Share on other sites More sharing options...
JustGav Posted July 25, 2009 Share Posted July 25, 2009 PS: And don't let your mate near the car again Oooh dear Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.