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The mkiv Supra Owners Club

Auto box issue


Guest Sausage

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Guest Sausage

This is just one of the problems I have and the worst one thank god.

 

My problem. No kick down all plugs on box not loose or bad connection same for under peddle switch. Overdrive not working or least I think it's not. Od light flashing 3000rpm at 80mph od working not working? I've read wire faults or a wire bridge can be done but where is this wiring hiding by Ecu behind the clock etc. yes it's de-limited but no idea where the box is. I've looked for the thread but I can't see for looking help please

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  • 3 weeks later...
Guest Sausage

Ok still got this problem. No fault codes. Turns out I've a mines ecu. So I'm at a bit of a loss here. Tryed the wire pink to blue/red but made management light come on and the triangle. I did an ecu reset and the of and kick down worked but now it dosent getting a tad fed up

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Interesting because I have done the pink wire mod to 4 cars now and none have thrown up a light. All it does is bypass a small active buffer circuit that is in the oddometer. Try and borrow a stock known working ecu and eliminate the mines from the equation.

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Guest Sausage

It's sorted to a point. the how to I read wasn't right I don't think. All working now as it should bar one problem. The warning triangle is lit up. The pink wire uncut hooked up to the blue one didn't work and engine light and triangle come on and the speedo stopped working. . The other one I read cut pink wire and join to the blue one at the plug end. The loom side just leave. Didn't work. So the way I thought it should be cut pink wire. The loom side hooked upto the blue wire bang fuck me she loves it but as side triangle light on.

 

Need to sort the light out now but the main thing is I'm happy it's all I expected and more. I've only been boosting 0.9 but now and then it spike. Now it's 1.2 all the time. Double de-cat 3" with 2.25 restrictor blitz air filter and hks evc colder plugs and a 255 walbro.

Did have a RR print out 384.2bhp but that's with both cats. Can't see that been right. Now I've play'd I'd say it's about that

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Guest Sausage

Still not right. 70% of the time she works but now and then stops working but no od light on then after 5 min seems to come on. And boost seems to go odd. Will boost to 0.9 and no higher only when gear box plays up so as its fine 1.2 bar and happy. Interesting tho it did 180mph with od light flashing. What dose 3rd top out at ? Seemed a bit fast bpu and mines ecu

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  • 2 months later...
Guest Sausage

Guess I should tell all its FIXED

The problem I had was speed sensor 2 and number 2 solinod in the box.

Changed valve body for a known working one that's been cleaned out. All gears work as they should now but the kick down pedel button dosent. But there seems to be a reason for that and it's down to the ecu as its a mines soon as it sees any medium/heavy load it gears down to where it needs too.

The code 42 I think it is speed sensor

Now the wire jump on the odo didn't work for me all just stayed how it was. Turns out this was to do with the ecu as well

The odo was working fine but I could see a dark spot on the glass. So got one off a beaker and fixed happy days only now I've gone form 51k to 125k so wrote down when swapped and now need it correcting to old mileage + now distance since fitted.

Apart from the blowing exhaust and ripping the shit out the rear tyres I can finally say I'm enjoying the car

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