TubbyTwo Posted December 4, 2012 Author Share Posted December 4, 2012 I will either be swap to another autobox or just swap to a R145, or break it and buy another Supra. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 10, 2012 Author Share Posted December 10, 2012 new auto ecu on its way. also going to try another o2 sensor as car has gone back doing 250 miles to a full tank with just normal driving. not sure if its that time of year but really starting to lose the love now Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 10, 2012 Share Posted December 10, 2012 Dude, I get about 250 miles to a full tank with normal driving as well! If you define a full tank as "the light has started to come on", and normal driving = a lot of city stuff. With an iffy autobox and the cold weather causing more accessory use and extended cold start etc. this is to be expected. You can check your O2 sensor at warm idle with a multimeter to see if it's okay anyway Quote Link to comment Share on other sites More sharing options...
Littler Posted December 10, 2012 Share Posted December 10, 2012 Stick with it dude as it could be fixed once the ECU is swapped Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 10, 2012 Share Posted December 10, 2012 Plus it felt great in 1st and 2nd gear Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 10, 2012 Author Share Posted December 10, 2012 Ecu should be here this week if its not that will source, flush, service and fit a replacement autobox. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 13, 2012 Author Share Posted December 13, 2012 autobox ecu arrived in post today so going to swap that over shortly and test Quote Link to comment Share on other sites More sharing options...
Littler Posted December 13, 2012 Share Posted December 13, 2012 Good luck Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 13, 2012 Author Share Posted December 13, 2012 knew i should have got my hopes up. no change. Parked up on the drive and covered over while i decide its fate. Quote Link to comment Share on other sites More sharing options...
David P Posted December 13, 2012 Share Posted December 13, 2012 Remember to try an engine ECU swap before you hang it. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 13, 2012 Author Share Posted December 13, 2012 will see what i can find. if the engine ecu or autobox swap doesn't make a difference, the car will be broken Jan/Feb time. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 13, 2012 Share Posted December 13, 2012 Autobox swap will fix it I reckon Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 13, 2012 Author Share Posted December 13, 2012 hope so mate. just got to source one now hopefully localish. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 13, 2012 Share Posted December 13, 2012 You'll probably get under the car to swap it and find a control wire hanging off *plug* *fix* Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 13, 2012 Author Share Posted December 13, 2012 I do need to get under and have a good look at the connectors..... Just incase Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 14, 2012 Share Posted December 14, 2012 Thinking about this I've doe a few searches of t'net and dug up this nice troubleshooting guide for Toyota autoboxes (yours is an A340 by the way). There is a bit about fault code checking on page 12 (section 5), so do that first if you haven't already, but what was rather interesting is on page 16 - the Manual shift test. You unplug a solenoid connector (there is a picture showing where it is, good luck relating that to the real thing because I couldn't) and then the transmission won't shift unless you move the stick manually. The great thing about that is position 1 = 1st gear, but position 2 = 3rd gear, your troublesome one. So you can lock it into 3rd like this and do some testing You can also test overdrive by putting it in D. So if 3rd works okay when it's manually locked in, it'll be an electrical issue. If it still struggles it's probably hydraulic. The rest of this PDF has a bunch of other tests you can perform as well, but I'd start with that one Autobox troubleshooting.pdf Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 14, 2012 Share Posted December 14, 2012 (edited) After more reading, it could be your C2 clutch (page 29) - I think you're experiencing slip when it changes to 3rd gear, which saps the acceleration away as the power is going towards heating up fluid/friction components instead. The video I took supports this and the behaviour in lower gears, as it rockets up to just over 3000rpm and stays there slipping while road speed catches up. Locking it into 3rd at low rpms will be a good test of this, see if it slips up to 3000+rpm when you floor it, and compare that to 1st gear. You could also left foot brake to put more load on 1st gear to make it a better test. Also, try getting up to about 4000rpm in 1st, holding it there with a steady throttle, and then shifting to 2 to put it into 3rd. It will probably take overly long to drop the revs down to 3rd gear's road speed if it's this clutch slipping. Clutch C1 is used for 1st and 2nd, clutch C2 only comes into play for 3rd and overdrive, so this all fits. The change from 3rd to overdrive possibly won't slip though, as C2 is already fully engaged and isn't mucked about with. Edited December 14, 2012 by Ian C (see edit history) Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted December 14, 2012 Author Share Posted December 14, 2012 wow, ok thanks Ian this weekends job, will try and get a friend to sit and film for comparisons. On another note still running the new auto ecu the box now has a new trick from cold, when pulling up to a junction in 2nd, foot off the throttle and onto the brake the box was juddering in the change from 2nd to 1st. Such as a manual car if you try and pull away without enough revs. did this until the box warmed up. will get on the error checking of my original ecu tomorrow. Quote Link to comment Share on other sites More sharing options...
Ian C Posted December 14, 2012 Share Posted December 14, 2012 Swap back your old ECU and see if the juddering issue goes away again. Either it's an artefact of that ECU, or your autobox is starting to circle the drain and showing other symptoms. Also, make sure you get the issue a few times bafore checking for codes - unplugging the ECU is an efficient way of clearing any stored ones Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted January 25, 2013 Author Share Posted January 25, 2013 Long overdue update, the car is now terminal, driving home last night and went for an overtake just at normal speed, no kickdown or excessive boost and its finished the box off, now whines really loudly, even with normal fluid levels. now struggles to idle in anything other than park, idle hunts all over the place, car slams into gear to the point where it jolts you back in the seat, even at low speed pulling away. The final nail in the coffin is the fact it stalls at junctions, checked fluid last night and its black, even after changing for some new halfords special to tide me over. Booked in next week to be changed which has been arranged since before Christmas, was hoping it would last. In park or N its fine, just when any other gear is engaged. Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted January 30, 2013 Author Share Posted January 30, 2013 Well car has just been dropped off for the gearbox swap tomorrow, so hopefully this will sort the problem, if not expect a breaking post to appear very soon, already started pricing the various parts up Quote Link to comment Share on other sites More sharing options...
mellonman Posted January 30, 2013 Share Posted January 30, 2013 hope that it sorts it for you mate dont loose the love just yet Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted January 30, 2013 Author Share Posted January 30, 2013 fingers crossed! poor old car has only been driven a couple of times since December, needs a bit of love. Having unnatural thoughts about a 535D at the moment.... Quote Link to comment Share on other sites More sharing options...
JasonR24 Posted January 30, 2013 Share Posted January 30, 2013 fingers crossed! poor old car has only been driven a couple of times since December, needs a bit of love. Having unnatural thoughts about a 535D at the moment.... Nooo, when i saw 535D i literally facepalmed. Don't lose the love Quote Link to comment Share on other sites More sharing options...
TubbyTwo Posted January 30, 2013 Author Share Posted January 30, 2013 hopefully a trackday will bring the love back 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.