robgti 0 Posted September 12, 2006 i know that this has been asked before but i would like to no what wires off the coil pack need connecting to the rev counter from a 106 gti engine to a 205. Any help would be great thanx Share this post Link to post Share on other sites
Sandy 189 Posted September 12, 2006 425 from the ECU, which becomes 426 and 4260 to the diagnositc plug. Share this post Link to post Share on other sites
robgti 0 Posted September 12, 2006 ok but ive been told that there is two wires off the coil pack which have to go to a resistor then to the rev counter itself thanks Share this post Link to post Share on other sites
Sandy 189 Posted September 13, 2006 (edited) There's four wires off the coilpack, one is 12v supply, two are the LT to the ECU and one is the suppressor.. The ECU gives a tacho pulse on 425/426/4260 If you take a pulse off the coilpack the rev counter will read half speed. Edited September 13, 2006 by sandy309 Share this post Link to post Share on other sites
robgti 0 Posted April 4, 2007 ok sorry to bring this back up from the dead but was wondering what resistors do i need to use to get this to work? i understand which wires im going to have to join just want to get it working thanks Share this post Link to post Share on other sites
Sandy 189 Posted April 5, 2007 It would be a pair of diodes, not resistors, but I really would take it form the ECU, much simpler!! Share this post Link to post Share on other sites
robgti 0 Posted April 5, 2007 so just find number 425 from the ecu and connect the rev counter feed to it yeah? cheers mate Share this post Link to post Share on other sites
Enfield 0 Posted April 5, 2007 Speaking of the rev counter, how the hell do you get it to work properly? Share this post Link to post Share on other sites
Casanova 0 Posted April 8, 2007 (edited) Mine's not working properly either - it kept shorting out 10A fuses so I stuck a 25A in there and its got through two of those already! Seems to read a bit high when it is working, too. § Edited April 8, 2007 by Casanova Share this post Link to post Share on other sites
