Digital Posted July 13, 2009 Share Posted July 13, 2009 When I turn on the ignition(not starting) the coils give a strange "electical" sound, which I can also hear through the exhaust manifold, as if the sparkplugs are continuous firing or something(haven't looked yet). When I disconnect the connectors from the coils the sound goes away more and more with each coil. After this, still with the ignition still on, when I put the connectors back on the sound is still gone. Does somebody have a clue what is going on? Quote Link to comment Share on other sites More sharing options...
Digital Posted July 13, 2009 Author Share Posted July 13, 2009 I allready renewed the wiring of all the coils from where the wires come out of the loom near the cam-poulies. (Hoped this was the solution because the were in very bad condition) Quote Link to comment Share on other sites More sharing options...
Digital Posted July 13, 2009 Author Share Posted July 13, 2009 Today I tested another ECU, and the problem/sound from the coils was still there. I removed a sparkplug to see if it fires when the coils make the sound, but this was not the case. Quote Link to comment Share on other sites More sharing options...
merckx Posted July 13, 2009 Share Posted July 13, 2009 Is this happening with all of the coils? What about the igniter? Do you have a workshop manual, this site is useful? http://www.turbosupras.com/pages/pages/technical/jza80/a80tsrm.htm Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 13, 2009 Share Posted July 13, 2009 Odd, damned odd. Quote Link to comment Share on other sites More sharing options...
Digital Posted July 15, 2009 Author Share Posted July 15, 2009 I just tested another igniter, problem still there. Then just to be sure I pulled out a sparkplug, put the coil back on and put the sparkplug on ground. Turned the ignition back on(not starting) and the sound was there again, and the sparkplug fires! So this is my problem, when I turn the igintion on all 6 sparkplugs are firing...anybody? There was a simple alarm-system in the car, most wires where connected to some places under the steering wheel, I neatly disconnected the ones which where linked to OEM wires, and 2 wires where "interrupting" one OEM, I disconnected them and put the OEM back together. Could this have something to do with my problem with the sparkplugs? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 15, 2009 Share Posted July 15, 2009 Something is triggering the LT side of the coils, an alarm in the ignition circuit that had gone mad MIGHT do it, I'm not qualified to say, but I have a lot of trouble with alarms and none / bad starting. It would have to be effectively switching the ignition on a nd off very fast. RyanG on here might know? Quote Link to comment Share on other sites More sharing options...
cheekymonkey Posted July 15, 2009 Share Posted July 15, 2009 Could the crankshaft position sensor be telling the ECU that the engine is cranking when it isn't? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 15, 2009 Share Posted July 15, 2009 I think the cam positon sensors would have to be doing the same, at the same time? Ryan.... HELP!!! Quote Link to comment Share on other sites More sharing options...
Digital Posted July 15, 2009 Author Share Posted July 15, 2009 Hmm, the sensors, that's something worth checking, but the engine which I put in now came off a good working car. Does a JDM 1993 AT TT has something like a original "starting-disrupter"(don't know the English word for it)? I feel like I correctly disconnected the alarm(cutting away linked wires and 1 reconnected, a patched everything neatly), but since this is the only thing that I've adjusted I would almost want to search the problem behind the steering wheel.. In general, could I (dis)connect something immproperly behind the steering wheel to create this problem? Quote Link to comment Share on other sites More sharing options...
absz Posted July 15, 2009 Share Posted July 15, 2009 IF it was the crank sensor triggering the coils then your fuel pump will also be running all the time when ignition is on. you should have a constant 12v feed to the coil packs and the negative is controlled via ignitor/ecu, check to see if you are getting a negative with the ignitor disconnected. it could be trapped wires sorting out somewere. Quote Link to comment Share on other sites More sharing options...
Ryan.G Posted July 15, 2009 Share Posted July 15, 2009 Hmm strange one this.... Is the Ignition suppressor connected next to the ignitor. Its the small grey box to the left of the ignitor IIRC Ryan Quote Link to comment Share on other sites More sharing options...
Digital Posted July 16, 2009 Author Share Posted July 16, 2009 Yes, this is connected. It was this alarm-system which I pulled out: http://www.laserlinedirect.com/public/control.php?_path=/601/604/613 Second from the top, Laserline 291 Quote Link to comment Share on other sites More sharing options...
Digital Posted July 16, 2009 Author Share Posted July 16, 2009 I tried to email this company but I get my emails back, can anybody help me with this or could contact this company and ask them if this problem with the sparkplugs has anything to do with their alarm-system? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted July 16, 2009 Share Posted July 16, 2009 Well, if the alarm is removed and it stops the problem, it's the alarm. If it's removed and the problem continues it's not the alarm. Shimple Quote Link to comment Share on other sites More sharing options...
Digital Posted July 16, 2009 Author Share Posted July 16, 2009 Yup, and the whole alarm-system is out of the car. But sometimes these systems are interrupting the fuelpump or ignition/coils, does anyone know where these wires are under the steering-wheel? Maybe I overlooked something.. Quote Link to comment Share on other sites More sharing options...
merckx Posted July 16, 2009 Share Posted July 16, 2009 does anyone know where these wires are under the steering-wheel? Unfortunately there isn't a fixed location for the immobiliser wires unless it was installed by Toyota when the car was new. Quote Link to comment Share on other sites More sharing options...
Digital Posted July 16, 2009 Author Share Posted July 16, 2009 Ok. Would like to know which wires under the steering wheel are for the fuelpump and coils, it's not clear to me in the diagrams. Quote Link to comment Share on other sites More sharing options...
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