Harllequin Posted April 28, 2010 Share Posted April 28, 2010 Hi there guys. After much reading of the posts I could find with the search function I'm no further forward with what to do next. Car: - 1993 GZ BPU+ Symptom When going hard the car will not change up its gears, it goes to the red line and sticks there. It does this in all gears not just 3rd to 4th. If I back off to nothing then re apply the throttle it will change up its gears. When I dive normal every day it changes up no problems at all. When in manual mode the same symptoms are there just as they would be if it was in auto mode. The car has also started to stick at random revs, some times it sticks at 4k RPM others at 3k RPM or goes to the red line and sticks there or any combination there off. Here is the good part, this does not all happen at once, they are all faults the car does, but when it does them is completely random. Most of the time it runs great. Checks so far: - Oil level fine having checked it hot and gone through all the gears etc. No fault code being displayed at all. Vacume hoses that I can find all look in good order. The oil does not smell burned and has a nice golden colour to it. Well guys thats the story so far. I'm not sure what to do next. I had thought of changing the gearbox oil, not a full change or a flush, just dropping the old from the drain plug and doing a refill. Cuting the wires to cure fault code 42 to see if that helps, even though its not showing any fault codes. yep I'm at the grasping at any idea time Thanks in advance guys. Darren Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 28, 2010 Share Posted April 28, 2010 Gearbox oil should be red AFAIK (well it has been on my auto Toyotas) Quote Link to comment Share on other sites More sharing options...
Harllequin Posted April 28, 2010 Author Share Posted April 28, 2010 Just checked it again, with a white cloth this time and yes it is red, sorry. Quote Link to comment Share on other sites More sharing options...
tbourner Posted April 28, 2010 Share Posted April 28, 2010 Is there an autobox ECU fuse you can unplug? Quote Link to comment Share on other sites More sharing options...
Harllequin Posted April 28, 2010 Author Share Posted April 28, 2010 I've had the battery off the car over night a few times to reset everything and the problems are still the same Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted April 28, 2010 Share Posted April 28, 2010 It sounds like a sensor or electrical problem by its intermittant nature. Quote Link to comment Share on other sites More sharing options...
RobUK Posted April 28, 2010 Share Posted April 28, 2010 I have a full Auto setup if you need bits.... Quote Link to comment Share on other sites More sharing options...
GreaseMonkey Posted May 1, 2010 Share Posted May 1, 2010 (edited) Toyota Autobox diagnostic repair manual section pg 349 http://www.turbosupras.com/pdfs/JZA80%20TSRM/DI.pdf Edited May 1, 2010 by GreaseMonkey (see edit history) Quote Link to comment Share on other sites More sharing options...
Harllequin Posted May 1, 2010 Author Share Posted May 1, 2010 Thats brilliant thanks. I'll have a look and see what I can see. Quote Link to comment Share on other sites More sharing options...
Harllequin Posted May 4, 2010 Author Share Posted May 4, 2010 Well I've tightened a the 2 cables, changed the gearbox oil and pulled off and replaced a few vacume hoses, the car seems to be shifting ok but I've not had a chance to try it properly for an extebded period. Fingers crossed though. Quote Link to comment Share on other sites More sharing options...
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