jim_supra Posted November 20, 2007 Share Posted November 20, 2007 Hi guys, sorry for the long post but I’m having problem with the autobox, I have tried searching and tried a few things as a result of searching but to no avail. And a lot of the topics found do not show what the cure for these problems were. This morning on the way to work the car started acting odd. Most notably I wasn’t able to get reverse gear. To engage reverse I have found that I have to let the car roll forward a little and then put it in reverse. Also the car is very hesitant at times, mostly at low speed and occasionally when setting of from a standstill, and has stalled on a couple of occasions. The gearbox occasionally jumps between gears when the throttle is applied at low speed (this doesn’t tend to happen when I have the ‘box in first gear though, it only tends to happen in third. The down shift is very harsh when it decides it wants to change. The up shift is smooth but again there is a delay in changing. The things I have checked so far are; Checked fluid level with car running etc. all seems fine and the fluid was changed around 6 months ago. Removed the HKS top speed delimiter Removed the Speedo converter which didn’t change anything Checked for error codes and the only one that showed was the o/d light flashing 89 (or 98) what could this be? Reset the ECU by removing the 2 EFI fuses for a minute. The O2 sensor was replaced with a brand new one last weekend New Battery today. Any help on this would be great Link to comment Share on other sites More sharing options...
jamesmark Posted November 20, 2007 Share Posted November 20, 2007 Here you go. http://img504.imageshack.us/img504/6352/20616575186uo2.jpg Link to comment Share on other sites More sharing options...
jim_supra Posted November 20, 2007 Author Share Posted November 20, 2007 Thanks James, That one has been flashing ever since I put the TT engine in so it seems that it isn't causing the problems. Any other ideas? Link to comment Share on other sites More sharing options...
jim_supra Posted November 20, 2007 Author Share Posted November 20, 2007 Right, the drive home has found more problems. All seemed to be going well as I set off from work, and it looked as if the problem was sorted, but a few miles down the road it started again, another 2 or 3 miles down the road without warning it stalled as I was going round a bend. I fought it to the side of the road and manged to coast on to the pavement. After that it wouldn't start and if it did I had to hold the revs on otherwise it would cut out. In the end to get home I had to drive in 1st keeping the revs reasonably high so it wouldn't stall. I have now removed the HKS De-limiter I had installed and the car now starts and idles but the gearbox issue remains. I have noticed also that there is a noise coming from the gearbox that sounds (thinks of a good way to describe it, but can't) like something electrical that keeps flicking off and on again. Needless to say now it's not being driven untill it's fixed. Link to comment Share on other sites More sharing options...
jim_supra Posted November 21, 2007 Author Share Posted November 21, 2007 Bump. Link to comment Share on other sites More sharing options...
VIL Posted November 21, 2007 Share Posted November 21, 2007 Might be of some help? http://www.mkivsupra.net/vbb/showthread.php?t=48855 Link to comment Share on other sites More sharing options...
jim_supra Posted November 21, 2007 Author Share Posted November 21, 2007 Might be of some help? http://www.mkivsupra.net/vbb/showthread.php?t=48855 Thanks, this is the code 42 fix right? I'm not showing a code 42 on the diagnostic check, so should I do this fix as a matter of course? Link to comment Share on other sites More sharing options...
VIL Posted November 21, 2007 Share Posted November 21, 2007 Thanks, this is the code 42 fix right? I'm not showing a code 42 on the diagnostic check, so should I do this fix as a matter of course? To be honest I could not tell you. Mine is so intermittent that I did nothing about it. (probably happens once every 6 months!) This was one of the solutions to the problem that was given to me so it may help, but other than that I don’t know much more…. If you do get to the bottom of the problem however I would be interested.. Link to comment Share on other sites More sharing options...
jim_supra Posted November 21, 2007 Author Share Posted November 21, 2007 Oh and just to add to the syptoms, when the car stalled last night the Rev counter needle was going crazy when I was tying to restart it. Once the car was started it was fine again. Edit:It wasn't the speedo it was the rev counter. Link to comment Share on other sites More sharing options...
Ian C Posted November 21, 2007 Share Posted November 21, 2007 Multiple wierd electronic problems could point to an earth fault. Are you getting any other symptoms like dimly glowing dash lights or a draining battery? -Ian Link to comment Share on other sites More sharing options...
jim_supra Posted November 21, 2007 Author Share Posted November 21, 2007 Multiple wierd electronic problems could point to an earth fault. Are you getting any other symptoms like dimly glowing dash lights or a draining battery? -Ian My old battery before I changed it yesterday did on occasion lose it's charge, but I put this down to the battery itself being on it's last legs. Link to comment Share on other sites More sharing options...
jim_supra Posted November 27, 2007 Author Share Posted November 27, 2007 Right, still can't figure this one out. And to add to it the car now won't start at all. It turns over fine but will not kick in to life and when the ignition is on the speedo needle is jumping around alot. Also, just before it decided not to start the revs at idle were very low, probably around 400-500 rpm's. I haven't checked the plugs and wether they are sparking or not, will do that tonight when I'm home from work (weather permitting) I can hear the fuel pump going and it is only 6 or so months old so I don't there's a problem with that. Very occasionally the car will begin to fire up but every time I begin to hear it fire up for some reason (and without thinking about it) I let the key return to the ignition on position as if it has started! I did the code 42 fix even though I wasn't showing a code 42 in the diagnostics check, but that has made no difference. I have been searching the forum for all the problems individually and trying to find a cause that is common between them all, the only ones I can come up with is a bad earth somewhere (as Ian Says) or the Speed Sensor itself is kaput. I don't know where to begin in checking for bad earths can any-one give me any pointers on where to look? and could the speed sensor itself be responsible for all this? Link to comment Share on other sites More sharing options...
georigg Posted November 27, 2007 Share Posted November 27, 2007 Jim, Appreciate this may not be totally helpful, but I had very similar symptoms on my Honda Blackbird, with the electronic speedo and rev counter jumping all over the place, would not run very well at low revs etc. Problem was a bad generator which had shorted out, both at the alternator cols and at the voltage regulator, reducing the system voltage below 9 volts which appeared to be the minimum to run the electronics including the engine management system. You say you have recently changed the battery and the old one presumably was shot? Possibly you need to look at the alternator circuits along with the battery as it sounds like you are losing voltage somewhere while the engine is running. Am I correct in assuming you have an auto box? if so, remember that the auto box contains a goodly number of electronically controlled circuits which also tie back to the engine management system so again, voltage drop at the electronics could be messing up the correct operation of these circuits. Rgds George Link to comment Share on other sites More sharing options...
jim_supra Posted November 27, 2007 Author Share Posted November 27, 2007 Thanks George, Ill look in to that Link to comment Share on other sites More sharing options...
Smellywelshman Posted November 27, 2007 Share Posted November 27, 2007 Don't know it this helps. Re: the mental rev counter, I had a recent problemwith my alt, basically it was on its last legs and only charging intermittently. When the battery had finally had enough and lost all charge (no charge whatsoever coming from the alt) the car died and as it did so the turbos were whistling all over the place and the rev counter was dancing the fandango!! Might be worth a check of the alt? I didn't have any of the gear selection problems though. It may be that the alt is not putting out enough charge to keep the engine running when its throwing a wobbler? Link to comment Share on other sites More sharing options...
Guest Garfy Posted November 27, 2007 Share Posted November 27, 2007 Like some have said, I also had weird problems with a BMW E30, like you say, it would stall unless you kept the revs up, would loose power, dash would go mad, electric sunroof wouldn't work, and it turned out to be the engine earth, I suspect this could be your problem, I'm not sure where it is located on the supra, but I would find it (or them) and remove, clean the mounting faces, and refit Link to comment Share on other sites More sharing options...
jim_supra Posted November 27, 2007 Author Share Posted November 27, 2007 I'll check in to that too, I am willing to try anything at the minute. Link to comment Share on other sites More sharing options...
Prof. Monkey Posted November 27, 2007 Share Posted November 27, 2007 engine earth is located on the passenger side. Remove and clean up! Link to comment Share on other sites More sharing options...
jim_supra Posted November 27, 2007 Author Share Posted November 27, 2007 Cheers Guys, will check this and see how it goes. Fingers Crossed. Link to comment Share on other sites More sharing options...
georigg Posted November 28, 2007 Share Posted November 28, 2007 Jim, Ive posted this link on a number of posts to do with electrical problems, have a look at http://WWW.internetwork.org.uk/manu/index.html There is a very good electrical manual on this site and there is a section on "ground points" page 240. worth downloading this manual for future ref! George Link to comment Share on other sites More sharing options...
jim_supra Posted November 28, 2007 Author Share Posted November 28, 2007 Thanks George, much appreciated. Strangely enough I was just abot to post up about where the exact locations of earth points were. will be doing this over the weekend. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now