teme76 Posted December 21, 2012 Report Share Posted December 21, 2012 Finally I finished my wiring. Few problems found... Ecu hold power relay stays on when I switch off ignition. Status stays active. Ideas what could cause that? Fuel pump works when I force it on, but won't prime (time = 2sec.) when I switch on ignition. Something to do with my first problem maybe? Teme Quote Link to comment Share on other sites More sharing options...
Simon Posted December 24, 2012 Report Share Posted December 24, 2012 The fuel pump no priming will be related to the ECU not shutting off. As the prim only happens at power on. You will need to check the wiring of any aux outs. If any have power when the key is off it will cause a back feed. Quote Link to comment Share on other sites More sharing options...
JCE Posted December 24, 2012 Report Share Posted December 24, 2012 You have wired it wrong, or you have the ignition sensing wire in the wrong place. If the the sensing wire is connected to the same as ecu power supply, the ecu hold power relay is keeping the power supply on and the ecu dont see the igniton being turned off. You must have a input programmed as ignition switch and the wire connected to the right place. This tells the ecu when power is turned on and off. And yes the fuelpump is primed only on key ON. Quote Link to comment Share on other sites More sharing options...
JCE Posted December 24, 2012 Report Share Posted December 24, 2012 You could also upload ur map/ecusettings Quote Link to comment Share on other sites More sharing options...
teme76 Posted December 27, 2012 Author Report Share Posted December 27, 2012 I checked again wiring and everything seems like on page 26 (ecu hold power wiring). Ignition is on Digital 7(B30) and is working ok. Ecu hold power is on Aux 10(B26). When ignition is off none of Aux connectors have voltage. More ideas? How to upload that PCL file to here? Quote Link to comment Share on other sites More sharing options...
JCE Posted December 27, 2012 Report Share Posted December 27, 2012 When u answer to a post there is below a windows Options/Upload attachment. Select Upload attachment and select your saved PCL file. Quote Link to comment Share on other sites More sharing options...
teme76 Posted December 27, 2012 Author Report Share Posted December 27, 2012 I get this message... "The extension pcl is not allowed." Quote Link to comment Share on other sites More sharing options...
JCE Posted December 28, 2012 Report Share Posted December 28, 2012 Save it as Zip or Rar file (packed folder). Goto file folder, right click on file->send to->packed file (zip). Upload the zip file. Quote Link to comment Share on other sites More sharing options...
JCE Posted December 28, 2012 Report Share Posted December 28, 2012 I looked @ the wiring, and if ecu settings are ok and wiring is ok. Only i can think of is a faulty Diode. There are 2 ways a diode can fail: 1: dont let current through 2: lets current through both ways. This would cause the relay feed the ignition switch sensing wire all the time and wont power off the ecu. What type of diode are you using? There are small ones (usually red/orange with black stripe) and bigger ones (usually black with gray stripe) The small ones dont hold much current and can easily fail. You need a diode that hold around 5 amps of current to be safe. As you know the diode is powering the whole system, before the ecu turns on the relays. Quote Link to comment Share on other sites More sharing options...
teme76 Posted December 28, 2012 Author Report Share Posted December 28, 2012 I'm using that 1N4007 and I measured it and it's ok. I hope that you can found some mistake from my parameters... Corvette-89.zip Quote Link to comment Share on other sites More sharing options...
JCE Posted December 28, 2012 Report Share Posted December 28, 2012 Parameters seem ok for the ecu hold power relay and ignition switch. There must be something wrong with your wiring. Look and measure how the cars electrics are connect and how they function. The vipec wiring diagram for the ecu hold power is just a guide, there are differences between car manufacturers and models. Heres how i made my ecu hold power, used a extra relay for it. Quote Link to comment Share on other sites More sharing options...
JCE Posted December 31, 2012 Report Share Posted December 31, 2012 One thing i did find strange is that there are no idle base position maps, no igniton, no fuel map. Have you removed those? Also noticed that you have fuel pump, engine fan, tacho and CE light connected to auxoutputs. How are these wired ? Is there a chance of backfeed in those? Turning the auxoutput OFF will NOT remove the backfeed problem. There is info about the backfeed problem in the vipec manual. Quote Link to comment Share on other sites More sharing options...
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