eyefi Posted October 1, 2002 Share Posted October 1, 2002 if i put a uk fuel system (injectors & pump) and a maf sensor on my jspec car (jspec stock twins and cams) along with a uk ecu would this run well, or work at all? would there b any rwhp befits from this? before i sort the tranny swap bits i wanna know if a uk ecu is viable. ta Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 This would be a massive amount of work! I still have the J spec ECU but haven't got my head around a price yet! Quote Link to comment Share on other sites More sharing options...
Gaz Walker Posted October 2, 2002 Share Posted October 2, 2002 Originally posted by Terry Saunders This would be a massive amount of work! indeed! Quote Link to comment Share on other sites More sharing options...
Gaz Walker Posted October 2, 2002 Share Posted October 2, 2002 Actually, why don't you buy a UK TT6 and get a few lads to help to wield a chainsaw about the roof Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 LMAO An AEM would be just as easy Eyefi Quote Link to comment Share on other sites More sharing options...
eyefi Posted October 2, 2002 Author Share Posted October 2, 2002 Originally posted by gazwalker Actually, why don't you buy a UK TT6 and get a few lads to help to wield a chainsaw about the roof like a chainsaw's gonna give a nice neat finish is it the ecu fitment thats alot of work? id sort of imagined it was a straight swap, maybe the odd wire different. i had wondered why no one ever used the uk ecu to go with the fuel system upgrade, rather than an external fuel computer, which to me would seem a better option for mild mods. an aem would b a nice option if they had the RL type traction contol enabled on it and getting maps for it was easier but the budget (and my missus) wont cover it. Quote Link to comment Share on other sites More sharing options...
Gaz Walker Posted October 2, 2002 Share Posted October 2, 2002 Originally posted by eyefi like a chainsaw's gonna give a nice neat finish Got some sand paper in the garage if thats any help? Gaz. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 Believe it or not the UK ecu & Jap are totally different. The UK uses interloped maps for the timing. You would need to configure the car as a UK car. At least the AEM uses a MAP sensor! Quote Link to comment Share on other sites More sharing options...
Digsy Posted October 2, 2002 Share Posted October 2, 2002 Originally posted by Terry Saunders Believe it or not the UK ecu & Jap are totally different. The UK uses interloped maps for the timing. You would need to configure the car as a UK car. At least the AEM uses a MAP sensor! Has anyone worked out why Toyota did this? It seems like a hell of a change to make just for selling in different markets. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 Seems crazy I know. Same as MAP Vs MAF, High Impedance Vs Low, Ceramic Vs Steel............... Quote Link to comment Share on other sites More sharing options...
eyefi Posted October 2, 2002 Author Share Posted October 2, 2002 Originally posted by Terry Saunders The UK uses interloped maps for the timing. whats interloped maps? Originally posted by Terry Saunders You would need to configure the car as a UK car. whats this involve? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 God now you are asking. I believe that it has two timing maps that interface depending on what the car is doing. The J Spec has 1 straight forward timing map. The obvious stuff would be required to configure it as a UK, Resistor Pack, MAF system but you really need to take a look at the ECU pin outs for both. They are pretty different. Also the TRAC is completely different & therefore possibly the ABS Unit. What are you trying to achieve? Quote Link to comment Share on other sites More sharing options...
Adam W Posted October 2, 2002 Share Posted October 2, 2002 As Terry says, the pinouts are different so you'd probably need a full UK engine loom as well to hook everything up with . . . I believe for big bhp purposes the Jap MAP sensor is better anyway (assuming it's hooked up to an aftermarket ECU). Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 Even if not on a Stand Alone I think the J spec ECU is better purely because the MAF sensor is a big restriction on Big Power cars. Quote Link to comment Share on other sites More sharing options...
eyefi Posted October 2, 2002 Author Share Posted October 2, 2002 Originally posted by Terry Saunders What are you trying to achieve? just an auto to manu tranny swap. i dont want to do any xtra work on top of a tranny swap. i wondered if it was possible to use a uk ecu, and it obviously appears to b impractical and of no benefit. now i know im looking only for a jspec ecu. thanks for yr help Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 mmmmm again look at the pinouts. I can't think why if the car is already an auto you'd have to change the ECU. The auto ecu has more outputs to drive the box etc I would have thought you could just leave these & the car would run OK. Might be wrong though. I doubt the maps are different. Quote Link to comment Share on other sites More sharing options...
eyefi Posted October 2, 2002 Author Share Posted October 2, 2002 im still investigating. it would seem to me (tho not at first) that there could b problems keeping the auto ecu. been discussing it here Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 2, 2002 Share Posted October 2, 2002 Still not convinced. Look at the pinouts & list the differences. I'll try & do the same tomorrow if I get the chance. I also know an ECU specialist that knows the Supra intimately ( UK though) I'll ask the question. Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted October 3, 2002 Share Posted October 3, 2002 I still think the maps will be different between an auto and a manual ecu, to take into account the drag of the torque converter and the retardation and closing of the sub-throttle butterfly when the transmission shifts, etc. Be good to know for sure. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 3, 2002 Share Posted October 3, 2002 If it were me I would try the auto ecu first & see what the car went like. I do know somewhere that will re-programme the ECU's but it could take ages. Quote Link to comment Share on other sites More sharing options...
eyefi Posted October 3, 2002 Author Share Posted October 3, 2002 ive been through the pinouts on the ecu list. i only have 2 pinout lists, a jspec and a ukspec. both the lists seem to cover auto and manual. i reckon 14 pins r used for the autobox. could b wrong tho. a3 - kickdown a7 - neutral start switch a9 - neutral start switch a10 - neutral start switch a18 - ect pattern select switch b1 - o/d direct clutch speed sensor b9 - ect no2 solenoid b10 - ect no1 solenoid b12 - ect solenoid slt b13 - ect no4 solenoid b14 - ect no3 solenoid b21 - o/d direct clutch speed sensor b24 - ect oil temp sensor b31 - ect solenoid slt the actual connectors into the ecu from the loom r labeled as being different on manu and auto?? im sure its gonna give errors with some of these removed just as a side note, there's 16 ecu pin differences between eurospec and jspec Quote Link to comment Share on other sites More sharing options...
Guest Martin F Posted October 3, 2002 Share Posted October 3, 2002 Originally posted by eyefi im sure its gonna give errors with some of these removed You can get round that problem by using resistors and connecting some of the wires together. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 3, 2002 Share Posted October 3, 2002 I am sure it will give errors but a Martin said you can get around this. What's the option, a manual ecu ( I was quoted £300 for one yetsterday) & a new £1k loom? I would try it & see. After what I have seen lately the loom is a weak point on the MKIV so I would NEVER buy a 2nd hand loom. Quote Link to comment Share on other sites More sharing options...
eyefi Posted October 3, 2002 Author Share Posted October 3, 2002 Originally posted by Martin F You can get round that problem by using resistors and connecting some of the wires together. where the hell do u start with that tho. this is something i wouldnt like to attempt, and where do u find automotive electrical engineers who have experience like this? or is this simpler to do than i imagine it is? Originally posted by terry a new £1k loom why would u need a new loom? the americans r just swapping the ecu. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted October 3, 2002 Share Posted October 3, 2002 You probably can use the existing loom if the pinouts match up. I know Auto electricians who work on F1 & WRC cars but they are NOT cheap. Quote Link to comment Share on other sites More sharing options...
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