slick

Reset the ECU again tonight to be sure, disconnected the battery for 15mins this time and its cleared the error code (just a regular flash from the light now). Obviously didn't leave the fuses out long enough the other day, I thought it only took a few mins. So one down, one to go Found this interesting on Supraforums (theres loads on the topic, but this one sums it up) http://www.supraforums.com/forum/showthread.php?p=3066883#post3066883 Over the water they seem to know of a common problem with the OBD1 ECU not being able to always support higher boosts around 1.2bar, seems to be a little hit and miss who it affects but theres several who have had the problem. Apparently this is how the 12v fuel pump mod was brought about trying to solve it, but it didn't help. The latest development is they say the only way round it is to swap to the later OBD2 ECU (which quite a few have), go aftermarket ECU or an Emanage... safc's and the like don't make a difference they say. What's the cream of the UK's supra owners make of that issue?

Now it becomes clearer Must be just what the yanks call it then Is there a simple way of testing the sensor itself to check its doing its job? I'm thinking ahead in case ruling the BCC still produces this error code....

Good point Ian, theres enough to worry about with mapping etc than introducing an unknown issue on top... besides I think turbo swapping is a fair way off yet in my case. Ian, I'm a little confused with what your saying about the TPS. I took the TPS to be the Turbo Pressure Sensor not Throttle Position. As in: Is the above information from mkiv.com wrong? Code 35 seems to relate to the Turbo Pressure Sensor too which ties in with the mkiv.com description, so if it is wrong its annoying to say the least.

I knew deep down that was coming really, I was just trying to ignore the voice inside telling me thats what I needed to do (hey we all get voices... right? ) Looks like that will be the only way of ruling it out 100%. Does anyone think that the error code on the TPS circuit which includes the BCC could be related to my Det issue, or are these likely to be completely unrelated? Oh and cheers Paul, you've filled me with hope No seriously, thanks for sharing the pain... just hope I solve this without going single (yet)

I will double check next time I'm out but I'm pretty sure it makes 1.2 @ 4k ish. Just checked my Thor boost graphs and they show 1.2 at 4k since removing both cats, with the cats in it didn't make that boost till 4500 rpm. Your second set of comments had me double checking the BCC guide hehe, till I saw your reply correcting it Ian do you have a theory on the code 35 TPS error, now that I seem to have ruled out dodgy connections and calibration of the unit?

Not max revs no, on Optimax at the min it will give slight det at 1.1/1.2bar at around 4000rpm ish maybe a little later but only momentary. On BP ultimate it lasted a lot longer and certainly not something I want to repeat for test purposes! The knock sensors seem to have a code assigned to them, but the only code I'm getting is this 35 that no one seems to know much about Cheers for the interest

Sounds good, so has this version taken the Emanage more into Fcon territory?

Cheers Paul, I guess going single solved yours then lol Another update anyway: This evening I redid the BCC connections with new crimps (didn't fancy soldering in the footwell and burning the carpet or something) to rule that bit out, the earth was the only one that I thought didn't look to clever so made sure that was sound. Recalibrated the BCC too as last time when I fitted it I set it to 4.29v which I thought may be too close to 4.3v, so now its at 4.1x volts instead just in case. After I'd done that I removed the reset fuses for 5mins or so and then popped them back in and did the diagnostic thing again (not started the engine as of yet) and it was still showing 35 (which as previously said I think is the Turbo Pressure sensor) So doesn't seem to have been a connection issue on the BBC side. Went for a run and I pretty sure its no different though, listened intently as I hit No2 turbo at 1.1bar and I'm pretty sure could make out a couple of 'tings' although nowhere as bad as when I had the BP fuel in. So I'm still none the wiser really but at least I know the BCC is fine connections wise. Could a faulty Turbo Pressure Sensor cause these symptoms does anyone know?

Cheers Ian, Re fuel: Over the months that this has been happening (only running 1.2 for the dyno due to this issue) I've had Optimax from 2 different stations up here and 1 lot from one near Thor, so dodgy batches seem unlikely although with only confirming det on the dyno its hard to be sure inbetween. Thor guys never mentioned hearing anything on stock boost no, thank goodness. I'm going to check the BCC connections and the setup on the adjustment voltage just to make sure thats sound with the TPS being mentioned as an error code and the BCC is wired into this circuit so could be related. Could a faulty BCC or loose connection on this cause det to happen in any way? I might get some NGK's with them being cheap enough to swap out myself and see if it helps, but ofcourse that will need a dyno run as I havn't heard it on Optimax myself yet The ECU has been reset at least three times since I first had the det issue brought to my attention, last time being when I did the pump last month. I've not had it on the dyno since doing the pump, but surely the episode the other day with the BP Ultimate shows that its still not happy as I shouldn't be getting det on that regardless. So its more than likely still gona be detting on Optimax should I run it at 1.2 again, I just wouldn't hear it still. Thanks.

Hello, sorry in advance for the long post but gona try and answer some obvious questions in the post to begin with I've had 4 dyno runs at Thor each time I progressed with the BPU mods, since having the car. The 1st run was with everything stock apart from boost up via controller. The 2nd and 3rd times was 2nd decat with 1st cat still in. The last time (4th) it was run was the addition of a Chris Wilson SMIC and 1st decat pipe (fully decatted). Now at 1.2bar Nod said he could hear a 'little det' on the last lot of runs definately since the exhaust/decat. I went for the CW SMIC as mine looked in a poor state so thought that might not be helping, but no after that was fitted along with the 1st decat pipe Nod @ Thor still said the same. I had a chat with Chris about it and he was suprised a UK spec would be getting any det at all unless the fuel pump was 'tired' so now I've gone and replaced that with a brand new OE UK toyota pump. The AFR's have varied as the mods have been done, but at the leanest under full (1.2 bar) boost they've never exceeded 12.5 so doesn't sppear to be a fuel issue as such. No idea of EGT temps as not got a gauge. The car has IK24's fitted 6months ago. Bear in mind at this stage I'd never heard anything dodgy myself, I was just going on what the Thor chaps had said. I decided to try some BP Ultimate in case I was getting iffy Optimax or something crazy. So I put some BP Ultimate in the other day and kept the boost on standard since, today I took it out for a spin and put it to my setting for 1.2bar and pulled away from an almost standstill. As it was boosting on No2 straight away we could clearly hear 'det' (the first time I've heard it myself so far) and it was unmissable so I backed off straight away. The peak on the controller read 1.15 so it hadn't completely hit 1.2 with me backing straight off. So 100% posistively audible det on BP Ultimate, so I'm assuming that on Optimax its only detting a little so hence why only Nod has heard it with his head to the engine under boost. Did the diagnostic error code check tonight. Just the one stored since I last reset the ECU which was when I fitted the fuel pump last month.... number 35 which according to the MKIV.com list is either the Turbo Pressure Sensor Circuit or Barometric Pressure Sensor Circuit with a ? mark as if they are unsure on the latter. The only thing I can think of with the TPS is that the Greddy BCC intercepts this wire at the ECU doesn't it, how far fetched would trying to blame the BCC be at this stage? Could a dicky one cause such issues even or is it normal to get this error code with one fitted? Now if you've read that lot you need a medal, if you've got a possible solution I will give you more than a medal! Cheers for your patience

Well done Rob and family and everyone who came along. Couldn't have asked for better weather, but I got too much sun as usual Nice to meet some new faces too and catch up with a few people from previous meets, me and Philippa are really looking forward to JAE now too and she was glad to have the other ladies to chat with as well Heres to the next time PS: Got to mention I had to show a new Boxster 'S' the way of the light on the way home, gutted him

Oh how true lol, how many times have I said similar If my Mrs read that she'd swear I'd got a split personality on here Rob if you fancy one then go for it, just bear in mind that one of the big Mac suppliers (actually built/supplied and provided support for them) I did work for used windows PC's to actually run the company... yes thats right none of the software they used would run on Macs tehehe how I giggled when they had to explain that one to us

I've been a good boy this year, honest santa Sounds good m8, can't wait for a peek.

Heres hoping for good weather, cya sunday.

Ofcourse I'll be checking your work out sunday now, you've let yourself in for it

Spot on Rob, your a star m8 I've got no excuse now, best get them ordered Cheers.

Well yes thats who make them and thats what was all over the boxes when we took them out to fit the tyres I know Seeing as lexus/toyota used them for the gs300 that they get reffered to as lexus wheels rather than TTE 'Grandstand'. Its the whole lexus/toyota thing isn't it. I got them from Inchcape Toyota on Deby road in Nottingham who are Lexus authorised and got them to fit them my tyres too which I'd bought online from mytyres.co.uk

Cheers, to be honest both me and the wife havn't noticed any real worsening of the ride, although we've only been in twice since they went on so maybe that will change when we go for a longer run in it Martin I've seen these on ebay I take it they are the correct ones? Hiya Zed m8, thanks m8 she shines up nicely but thats after a quick wash and wipe down... must get the polish out too next time As for suspension, I dunno.. I'm getting some noises that could be suspension related so assuming sooner or later its gona need looking at, but a little dubious about the clearence on the Nur Spec - I'll have to look into it a little I think. Yours is looking very good bud, what drop is that? Thanks to you other chaps too, nice to hear

Cheers m8, but yours looks great! I was thinking about the indicators, are they a direct replacement or does it take some messing around? Thanks Peter, yes I've checked that picture out several times over the past weeks! Helped me decide along with a few others who had them on too, including another red one I found just after I'd ordered them.

18" 245/40/18 front 275/35/18 rear

Cheers m8, well thats 2 of us at least that think they look ok

Got my TTE wheels on this week, gave it a wash and wipe down and then had a drive in Clumber Park to get some shots of them. Wasn't sure how they'd go with the red, but I'm very happy with them and don't think I could have picked a better set of wheels Thankyou to all who gave me advice and info which helped me decide

I find it hard to believe people couldn't be interested in these unless they've already 'upgraded', they are excellent according to anyone who's ever had one it would seem (including my humble self ). It would be a shame if people got so cheap as to not want quality items like these.

Going to get these fitted shortly, just thought of something though. Which locking nuts should I get? The Toyota ones or the Lexus ones as I've been told they are slightly different and using the incorrect ones isn't ideal

lol so true, and punched in the balls squeeky voices inbetween