johnd-mkiv Posted August 9, 2010 Share Posted August 9, 2010 (edited) After doing a 1jz instal on an m3 bmw I am having a few teething problems around 4-4500rpm the car coughs and spluters I have swapped the coil packs plugs an ignitor for know good ones. the engine warning light now comes on after calibrating the tps it picks up in the higher revs but still splutters, before doing the tps no engine light come on i have tried the manual diagnostic check and its showing up code 42 which on looking in the manual is the speed sensor signal. The speed sensor wire from the ecu is doing nothing which makes me believe the car has no idea how fast its going. Im going to try this mod in hope this will cure it, http://www.supraforums.com/forum/showthread.php?t=349732&page=4 i can find the speed sensor wire its just the vss input wire im unsure of. I have an ecu pin out with the speed sensor listed as T8 pink wire & T7 is a blue and red wire that runs up to the grey square block that I guess would have gone to the dash, this is listed as being a/c signal from a/c ecu to engine ecu> would I be correct in cutting these two wires an the ecu and soldering them together to complete this mod. I am running a seperate speedo for this car Detailed picture of dashboard plugs the on I believe is the big square plug number 9 http://www.supras.nl/index.php?optio...d=38&Itemid=54 ecu pin out picture http://www.google.co.uk/imgres?imgur...ed=0CBsQ9QEwAA Your help will be greatly appreciated John Edited August 9, 2010 by johnd-mkiv (see edit history) Quote Link to comment Share on other sites More sharing options...
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