theo calvez 1jz Posted January 19, 2023 Report Share Posted January 19, 2023 hello im trying to have some spark on my m50tub25 turbo 1st i wanted to put some vag audir 8 coils (U5014) i did the pull up resistor mod with 470ohm on the 5v with no luck i've found on the link forum that you needto do the same pull up resistor wiring but with the 12v for this coil so i did but no spark i've tried with some vq35de coil, pull up resistor with 5v and 470ohm and it works i had spark so i get back with the vag coil i tried two types of wiring vag short coil and long coil as i didn't know what size i have now i m 100% sure they are long vag coils i tried back with vq35de coil and it get hot a lot i stopped the ignition test now i don't have spark with any of them oem coil vag coil vq35de coil i bought an osciloscope to check the signals i attach 2 pics the one with a signal that we can see is without pull up resistor it is the direct signal between the wire of the ecu and the engine ground spark edge : falling straight 0v and +1v pulse and -1v down (don't) know if it is good or no) x axis 5ms/div y axis 1v/div the one with the straight line at 5v is the signal between the same wire with a pull up resistor between 5v and this wire and saprk edge : rising iit keep straight no pulse up or down so no sark x axis 5ms/div y axis 1v/div i've attached the ecu file too can you tell me what's wrong please ? e36 mioche.pclx Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 19, 2023 Report Share Posted January 19, 2023 It sounds like the ignition drives are possibly fried. Are you just testing 1 drive or are they all the same? Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 19, 2023 Author Report Share Posted January 19, 2023 ho nooo i've just tested one today with the osciloscope (ign2) Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 19, 2023 Report Share Posted January 19, 2023 Try another to confirm. Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 19, 2023 Author Report Share Posted January 19, 2023 here is the 6 ignition out put without pullup resistor signals Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 19, 2023 Report Share Posted January 19, 2023 You will need a pull-up to see the proper signal. Usually there is an ignition coil connected which acts as the pull-up. Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 19, 2023 Author Report Share Posted January 19, 2023 OK so i do the same test but with a pullup resistor 470ohm and 5v ? Or 12v ? Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 19, 2023 Author Report Share Posted January 19, 2023 And the spark edge ? Rising or falling ? Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 19, 2023 Author Report Share Posted January 19, 2023 ok so here it is i have some isues to ad some other pics ... i did the exact same test as above " ign6 pullup resistor 470 ohm 5v saprk edge RISING andcan see any pulse "1 file would exceed the total allowed size of 229.79kB, and was skipped" Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 19, 2023 Report Share Posted January 19, 2023 That last picture still doesnt look right. But I dont think it is a driver problem as how it drops to only 4V would be pretty impossible for a transistor to achieve - they will be either ground or open so we should see either the pull-up voltage or ground - we shouldnt see some odd voltage in between. Are you using standard oscilloscope probes? Do your probes maybe have a 1X/10X switch on the side? Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 20, 2023 Author Report Share Posted January 20, 2023 Yes standard probe x1 100% sûre Sorry i can't ad more pics :/ Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 20, 2023 Author Report Share Posted January 20, 2023 Do ibhave to send the ecu to you for à repair ? If possible ? Quote Link to comment Share on other sites More sharing options...
Adamw Posted January 20, 2023 Report Share Posted January 20, 2023 Yes I think that is the best plan. Email [email protected] with some detail of your location and a note that you suspect an ignition drive is damaged and you would like it tested. The will give you a form to fill out and some instructions on the closest warehouse to send it to. Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted January 20, 2023 Author Report Share Posted January 20, 2023 OK thank you very much Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted February 18, 2023 Author Report Share Posted February 18, 2023 hello, i just received the fix ecu there were a burn damaged ignition GND pin 55 on the bottom board cause by excessive current. but i still have no spark with vag coils i checked the wiring 1000 times i have checked the signal out of th ecu with the pull up resitor wired and the signal is the same as i put it in rising or falling spark edge ... when the spark edge is in rising the ignition test is off the signal is flat at 0v when the spark edge is in rising the ignition test 2 on the signal is most of the time rising at 12v and a pulse at 0v when the spark edge is in falling the ignition test off the signal is flat at 12v when the spark edge is in falling the ignition test 2 on the signal is most of the time rising at 12v and a pulse at 0v is it normal ? i dont have spark in test mode i did not try to start ok i think i have found in test mode it does not work but when cranking the signal is different most of the time at 0v and a pulse at 12v so i will try to start without testing in test mode Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted February 18, 2023 Author Report Share Posted February 18, 2023 ok, engine is runing so to make this ecu work with vag coil (u5014) you need to do a pull up resistor like in the instructions that link gives you with the ecu except that you need to do it with the 12v and not the 5v after that set the spark edge in rising dont try to test it with the test page it will not work but when cranking yes it works my wiring was good since the beginning ! the coils were good too but i was only trying in test mode ... and finaly after a lot of things tried i've burn a pin ... so the porblem is in the software of the ecu because he doesn't give the right signal in test mode Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 19, 2023 Report Share Posted February 19, 2023 Yes test mode doesnt reference the spark edge as far as I know. But it should not cause any issues with the ecu - the only current the ignition outputs have going through them in your case is the load from the pull-up resistor, 30mA at the most. The coils will get hot, but not the ecu at all. Quote Link to comment Share on other sites More sharing options...
theo calvez 1jz Posted February 19, 2023 Author Report Share Posted February 19, 2023 i would love to show you the diffence of the signal in test mode and when crankink with same setting and wiring but i can't ad more pictures :/ i think you should modify this test mode to give us the good signal or at least tell us in the instruction to not try the test ingnition mode unless you have oem bmw coils yes i will not burn the ecu, that was my bad 100% but it is because i had not spark ( in test mode) and i tried some others wiring en software settings the good wiring for vag coil (u5014) is the wiring long/normal i've posted on the 1st post of this discution Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 19, 2023 Report Share Posted February 19, 2023 5 hours ago, theo calvez 1jz said: i would love to show you the diffence of the signal in test mode and when crankink with same setting and wiring but i can't ad more pictures I already know what a rising edge and falling edge ign signal looks like. 5 hours ago, theo calvez 1jz said: i think you should modify this test mode to give us the good signal or at least tell us in the instruction to not try the test ingnition mode unless you have oem bmw coils In test mode the rising/falling edge doesnt matter as we dont care about spark timing or dwell as we arent running an engine, all we are doing is sending a pulse to the coil to test the wiring or test if there is a spark. You will still have a spark in test mode regardless of the test mode working with a rising edge or falling edge, regardless of OEM coil or non-OEM coil, the only difference with the inverted signal is the dwell time will be longer than normal so the coil will heat up if you leave it running in test mode for a long time. Quote Link to comment Share on other sites More sharing options...
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