Shane

Bit of advance notice for you all, this years meet at the Ace will be the evening of Sunday 28th April. More information closer to the date.

Think you will be very lucky to make one from wood and it working. My first NA was a nightmare to get out, couple of "garages" tried and failed as did the famous starter method. I ended up making a tool out of 2 pieces of old angle iron, bolted it together in a y with the long leg sitting on the chassis legs. When they are as tight as that your locking tool needs to be flat against the pulley face, any movement and it will all start to twist twist and break. Also worth mentioning that you can drill the holes in the old pulley and re-tap with M10 if you screw the threads up. Once you have a decent locking tool and a long bar you will be fine, but be careful when it does finally crack it really does go. There is another way of locking it up by removing the big rubber cover on the back of the bell housing and locking up the flywheel, never used that method myself though as once I had built the as rough as tool I have since had no issues and its been used on several cars now. Edit: Here you are, a picture of the tool from back then http://www.mkivsupra.net/vbb/showthread.php?282646-Removing-Crank-Pulley-2JZGE/page2&highlight=pulley+shane And, heres a thread where the ever helpful Scotter provided the dimensions I needed to make the tool, more then 10 years ago! http://www.mkivsupra.net/vbb/showthread.php?119864-Crank-pulley-question&highlight=pulley+shane

No.1 sensor provides signal for the speedo and odo, its buffered in the odo and then gets back to the ecu after buffering or not if as in your case the pink wire mod is in place and the simple buffer circuit is bypassed. What I have discovered is that the reason it goes back to the ecu was a fail safe mechanism built in by Mr T so if the speed sensor No.2 fails, instead of leaving you stranded the ecu gets enough info from No1 to get you home. So with that in mind, if the ecu doesn't see what it's expecting from No1 it wants you to know and you get code 42. As you have no speedo, I would be looking at the output from No1 sensor first. HTH

Although that's a few years old, if the unthinkable happens and we have a second referendum, it should be shown on a regular basis throughout any campaign just so no-one can say they didn't realise.

I agree, IMO we should now be preparing to leave without a deal in place and let them come to us instead of running off to Brussels every day begging for concessions. They have made their position clear so lets deal with it.

Daft old git! And as for Tony Blair now poking his nose in....does he (and anyone else who may listen or be influenced by him) not remember that he was vastly unpopular towards the end of his time in office and in the eyes of many was a war criminal. All this nonsense about "the peoples vote" winds me up too, I thought we already had one of them, think he means a losers vote.

So with a stock Jspec TT speedo and face and the wheel, tyre and diff (NA Auto) set up we have, a multiplier of 0.140 does the trick and is as close as it needs to be across the whole speedo range compared with a GPS. Hope the info in this thread will help someone if following a 1uz conversion they have similar issues. Thanks for everyone's input

Hang on, that doesn't make sense! I think we have pretty much established that Supras/Soarers, most in fact No.1 VSS's are outputting around 4 pulses per rpm of the transmission output shaft but there seems to be an exception with early LS400s. Why then is your Suprastick programmed for 16 pulses per rpm, unless you are taking it from a wheel sensor or maybe the No.2 VSS (thats the 2 pin sensor) and not the No1 VSS? Unless the box dies we are unlikely to know as theres little point in laying underneath and struggling when 4 connections to the DET3 and a bit of experimentation/basic maths will fix the problem and provide speedo. Hey Scott thanks, yes after all this time its up and running and as you described its a great engine. Progress was thwarted a bit by pikies knicking the plastic crate with the ancilleries in but luckily most of that we didn't need and thank god I took the ecu out for safe keeping before that happened. Gearbox is silky smooth and Dave did some of his magic on it which helps further and the engine pulls like a train and sounds awesome. As for the MR2 bit, that's the rev counter you are thinking off I think. So the well trodden path on these conversions is that you use the stepper motor and pcb from a 4 cyl MR2 and take the feed from one of the 1uz ingniters giving you the correct rpm. We did this....BUT..knowing what I know now I doubt if I would if I was doing another conversion, I would simply do it electronically using the Det3 piggy back that will also be used to lose the MAF and a load of other stuff. Will also be a a MAP system ready for some forced induction at a later date with a bit of control over fueling too

That was pre ecu straight from the collector of the VSS. No.1 sensor output doesn't get to the ecu until its been to the speedo and through the odo. Why would the ecu multiply anyhow, what would be the point? Either, the gears in the box are turning the vss 4-5 x faster or (less likely) the vss shaft has 4 or 5 magnetic splines rather than one, as the box is in the car I don't intend to find out. But according to the part numbers you put up the sensors are the same so this would suggest gearing.

OK so I pumped the tyres up and dug the TT out of the garage to make the comparison between sensor outputs. Output from No.1 sensor on the original TT 1995 box is approx 32Hz @ 20mph Output from the No.1 sensor on the 1989-90ish LS400 box is approx 130Hz @ 20mph I have now fed the No.1 sensor into the DET3 ECU and used the frequency conversion feature and running the speedo from it. Stuck in a multiplication factor of 0.25 just to see if it worked and the speedo is now tamed, not accurate but not off the end stop at 30mph like previously. It was getting cold and dark so tomorrow I will tweak this and get it calibrated against gps. Have a few pictures so will get them up here when I have scaled them down, such a pain now photobucket has gone to get pictures up here.

Had nothing but good experiences with Mtec for the past 15+ years or so on most of my cars in that time. Most of their stuff seem to be re-engineered Mintex I reckon, some would frown at that as its brakes ut I have had only good results. Good value for money. My only concern is that they have grown a lot as a company in recent years from what seemed to be a very small concern in NI and sometimes thats not a good thing for the consumer. Also worth looking out for deals at GSF using their discount codes that you can get by registering your email. I recently bought a set of 4 Brembo disks for a E60 BMW using a 55% code and paid less than £160 which for Brembo is a great price. This weekend's discount code with GSF is VIP58

Well I am glad you have it back and it's in a usable state Ben. You have been through a lot with it and fair play for getting it resolved. But...dare I say and I hope you wont be offended or take this the wrong way. HP seem to have put a lot of effort in making sure you are satisfied and issues addressed. It is a 20 year old car as they have said several times and some of the issues would have been there or appeared regardless of who worked on it. I also think they have possibly put more of the arguably existing or new problems right than some other places would. I have nothing to do with HP and until your thread had never heard of them so I have no bias on either side. They can hardly be held responsible for things like the lack of rubber (Unless you gave them carte blanche to do absolutley everything they felt fit which I doubt) or a bulb failure on the number plate light. The missing battery tray, did you ask them to fabricate or source one at anytime? Best thing I reckon now is to try and put this behind you and enjoy the car, its a 20 year old car and things may and probably will go wrong. Only you can make the decision if you want to carry on with it when these problems inevitably occur. Going through a similar experiance with my Son who has just come to the end of a epic supra rebuild and although it is brilliant he has been getting to the point where he is low on confidence with it, but hope in time this will be ok as he begins to use and enjoy it. Odd how the independent who you would think types, reads and uses the word "brake" constantly spells it as break though. Good luck for the future.

So what are you saying, you don't think there are five times more pulses coming from sensor No.1 on ours and you still think its something else like the way its connected? Dellboy has confirmed the way his is connected and its the same as ours. 2JZMike also confirmed the wiring method as does the link below, as in the frequency generated leaves the collector of the transistor in the vss and feeds the speedo, what happens after this is irrelevant in terms of the odo buffer and ecu. A test with a second speedo wired direct to the VSS produces the same. Its not that complex and very old school electronics, I don't know the thinking back then of why they used a different pulse rate and speedo on the early 400 but it seems they did. Did you get chance to read all of this: http://www.lextreme.com/forums/index.php?threads/w58-in-ls400-what-a-p-i-t-a.15612/ http://www.lextreme.com/forums/index.php?threads/1uz-speedo-setup-with-rf1a-t-case-help.16249/ Most people use Soarers as their base and and the VSS is the same as the Supra so there are no compatibility issues. I will get the id from the box if its still readable, but we know it came from a 89 plated LS400. Do you know anyone who has used an early LS400 with the box and ecu to ask, or even a box from one? I don't. If I get chance at the weekend I will scope the output from Paul's and also from mine and see what the difference is, I believe it will provide conclusive data. It's possible that the gearing ratio is different, or it could be the sensor is constructed differently to provide the higher frequency that we are seeing. But, now I have thought about using the det3 ecu he already has, I think if it's a speedo drive gear ratio difference it will be easier wire that in than trying to change the gears with the box in situ.

Yes.

I found this: Early Vss - 83181-50010 Listed for USDM until 08/92 but listed for some other markets for the whole range of UCF10. Seems pretty much lexus only Later Vss - 83181-24040 Listed for a wider range and also seems to be used in some models back until 1989. Also, realised that he has a ECU Master DET3 piggy back to go in so in time we can lose the MAF. This has the capability of frequency conversion too Page32 - 35 http://www.ecumaster.com/wp/wp-content/uploads/2016/11/Digital-ECU-Tuner-III-Manual-English.pdf

What about a 89 LS400 UCF10?

Hi Mike, thanks. Yes sensor No.1 which drives the speedo is the 3 pin one and thanks for confirming its this that you used to drive your speedo. May take you up on the kind offer depending on how we get on with Dave's. Exactly this, thanks for your input. I am concerned that the gearing to the No.1 sensor on this box merely turns the shaft five times faster than it does on the later boxes. Looking through the other forums I cant be 100% sure if simply changing the sender will fix it. What I intend to do initially is put a scope on the one Dave has offered and then pull the one from our box and do the same test, think its the only way I can be sure. Yes I saw the Dakota unit in post from Lextreme which I posted earlier. Looks like a versatile unit and given how much time its going it will take to write a bit of code and make something up its probably worth the punt.

I spoke to Paul and we will come over in the next week or so, he prefers the weekend. His car is going back to the paint shop next week as theres a couple of small issues he's not happy with and the guy has agreed to rectify so will try and get over before then so you can see his car.

OK no thats not the case. Sensor 2 does the gears, sensor 1 speedo. I incorectly tried to run the speedo from sensor 2 when we got the car running before I knew this. The car is changing beautifully as it is and I dont intend to touch sensor 2 or the wiring of this. Now its interesting you should suggest this. I have just been reading somehtiung that suggests the very reason the output from sensor 1 makes its way back to the box is as a back up should something go wrong with the output of sensor 2. The idea being that it throws a code and tries to use the output of sensor1 to get you home as the box doesnt like no info at all. Its interesting stuff and has been a steep learning curve.

No because its Speed sensor 2 that goes back to the ECU and controls the box and speed sensor 1 that does the speedo. To me at least it looks as though these are unconnected mecahnically and I dont intend to mess with the No.2 sensor. What am I missing?

OK nice, thanks will tell Paul to get in touch or try and get over myself. Only thing is now though, as you know thats not going to be easy to change in situ. Sorry to hear that, I too have been ill as you know and had a call back from the Docs this morning to say the latest Phlegm sample I provided on Friday morning has come back showing I still have an infection and I need to go back to the Docs today. Obviously compared to how ill I was I am sort of ok and getting by, but explains why I have been feeling so rough this weekend. Hers a bit more info for you on the speedo. Early sensors fitted to LS400s put out around 350Hz at about 60mph and later ones (and I assume supras) put out around 65Hz

I hear what you are saying and Paul said the same. We spoke to Jay yesterday and his box came from a soarer and connections made from the 32pin orange body plug across to the ecu, thats not how the early UCF10 LS400s were done. For clarification I have looked at several wiring diagrams from the UCF10 and its clear that the No1 speed sensor output comes from the yellow cable and makes its way to the the speedo SP pin before moving on to the ODO and then returning to the ECU, this is bassically how Mike2JZ suggests in his first post in this thread. This is now how it is wired, we are simply seeing five times the amount of pulses from the LS400 sensor than the supra speedo is expecting to see. The yellow cable providing pulses from No1 sensor is connected to the wire from the original body loom on the supra which makes its way back to the SP connection of the speedo. To take any wiring errors out of the equation I hooked in a loose speedo I found direct to the LS loom wires from the gearbox and its the same. Doing a bit of research I found this: http://www.lextreme.com/forums/index.php?threads/w58-in-ls400-what-a-p-i-t-a.15612/ Although he has the opposite problem to us as he used the w58 drive arrangement (4 pulses per rev) with the ls400 cluster. More info as to the wiring on P232 here: https://cardiagn.com/system-circuits-1990-ls400-ewd/ also P231 shows the signal going into a simple buffer in the original cluster and returning to the ecu. I am confident, it should work as its wired no using No1 sensor for the speedo, its just getting the wrong info. Do you have a supra/soarer drive with gears we can try?

An update: Paul got under the car and hung an oscilator on the plug going to No1 sensor, quickly found the wires in the loom inside the car and as I suspected I had never connected No1 sensor up. Excellent we think, job done. Five minutes later Supra pod connected to No1 sensor and time to test, by the time he had travelled a few metres speedo reckoned we were doing about 50! Aha, so the speedo/pod is faulty. Dug out an old TT speedo I had and hooked it in down inthe passenger footwell to test, exactly the bloody same. Done a bit more digging and discover the older LS400 No1 sensors put out 20 pulses per revolution of the transmission output shaft compared to 4 pulses to every rev from the No1 sensor of the Supra. I need to decide do we find gears and sensor from a supra and then struggle to change them on this transmission, or do I build a divider circuit dividing pulses by odd numbers isn't as simple as evens, but can be done and simply put this in line. Also studied a LS diagram in conjunction with a LS ECU operation description and can confirm SPD pin on the ECU does not drive a speedo. This pin does get a buffered output of the same signal fed to it. The only reason I can think it should have this is to generate a gearbox code to let you know when Sensor1 has no output. Mention it only in case it helps someone else when searching.

Hi Wes, only becasue the engine and box came as a package. It made sense to stick with it as I have used the ecu from the same vehicle also. DavidP did his stuff on the box and OK'd it in terms of compatibility and its pretty much the same as a supra box I believe. Also, the Supra was a bare shell and was bought without box. I am now almost certain that the No1 sensor is present and that I haven't used it, as in its connected to nothing at present. I may find when I look on Saturday that I am wrong, but am pretty confident thats going to be the case. I don't do Facebook but my son does, think he has put all the buid on there if you want to take a look. Paul Hogarth.

Thanks for the reply. I will let you know for sure at the weekend so long as I am well enough to work on his car (been pretty ill recently). Can't say for your car, but my thoughts at this time knowning what I do now is this: SPDM on ours has nothing useful on it, SP2- & + do and I am more than happy the box is changing correctly. Nigel Wade's excellent guide suggests what you are saying too that the speedo is driven by SPDM. I think its an error and as good as the guide is, on ours at least I have come up against a few discrepancies so far. The link I put in my last post for an early 400 shows Sensor 1 is present and drives the speedo, I will confirm this at the weekend, fingers crossed and all that. I also think there is every chance the output from sensor 1 goes to the speedo and then onto the odo. In the JZA80 at least, its at this point where it is subjected to a little buffering and fed back to the ECU (search pink wire mod). If you look through the possible transmission fault codes for the LS400, one of them is generated when the ecu doesn't see action from sensor No.1. I think the buffered output from the ODO goes back to SPDM to allow the monitoring of Sensor 1 and for this code to be generated, how else could it do so? It could be and sounds like that on yours it's different Thanks again and will conform after the weekend all being well. Certainly hope I am right and the speedo isnt driven by SPDM becasue if so I have a duff ECU and the options are limited then, find a still working early LS400 ECU, or live with this one and start counting pulses and build a little divider so we can use a wheel sensor.