DatsunBoy77 Posted September 11, 2003 Share Posted September 11, 2003 Just wondering now, I have been fooling with my car (83 turbo motor) for weeks withought getting any spark. I am now wondering if it may in fact be the ecu. I say this because i have tried a different coil and different power module. According to my chilton's you could hold the couil wire 1/4" from the block and it should emit a spark. Nothing. If my distributor was bad i would still get a spark from the coil, correct. The ecu controls the spark going into the power module, i think. I gotta go back throgh the manual and reeread that section again. Well, my real question is there a way to find out if my ecu is toasted withought haveing to buy a $600 eccs analyizer. Thanks for any info. If anyone has one for cheap let me know, i only really need if for a couple weeks till i start my megasquirt conversion. I just have to make sure the car is running right first. Ryan Quote Link to comment Share on other sites More sharing options...
Guest Aaron Posted September 11, 2003 Share Posted September 11, 2003 Make friends with the local Nissan dealers. If they are one of the older ones, they should have an eccs analyzer. You may can borrow or rent it from them. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 11, 2003 Share Posted September 11, 2003 Have you checked the crank angle sensor? That will prevent the ECU from triggering the spark. Quote Link to comment Share on other sites More sharing options...
DatsunBoy77 Posted September 11, 2003 Author Share Posted September 11, 2003 Yah, i was worried that the cas would do that. So i just want to make sur i test it right. Basically just remove the distributor but leave the wire connected from the coil and spin the rotor by hand. As it is spinning i should have power coming out of the harness. Do i check each pin for voltage or is there another way to test it? Help. No manuals i have touch on the turbo dizzy. ryan Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 11, 2003 Share Posted September 11, 2003 I believe that if the CAS is bad, the ECU will not fire the injectors either. Are you getting fuel? If you are, your problem is not the CAS or the ECU. If not, it probably is the CAS, but it could be a bad ECU as well. Quote Link to comment Share on other sites More sharing options...
DatsunBoy77 Posted September 12, 2003 Author Share Posted September 12, 2003 I am definatly getting fuel. The plugs get wet and that is all you can smell after cranking it. Maybe it is the CAS. Now I am going to switch to megasquirt and have plans to use the stock distributor, now would it be more sensible to but a new distributor with a lifetime warrantee or just continue to buy used ones? This bad one is my second since i got the car in january. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted September 12, 2003 Share Posted September 12, 2003 I am definatly getting fuel. The plugs get wet and that is all you can smell after cranking it. Maybe it is the CAS. Now I am going to switch to megasquirt and have plans to use the stock distributor, now would it be more sensible to but a new distributor with a lifetime warrantee or just continue to buy used ones? This bad one is my second since i got the car in january. Like I said, if you are getting fuel, I don't think it's the CAS or the ECU. It sounds like a straight-forward ignition problem. Quote Link to comment Share on other sites More sharing options...
Jersey Posted September 12, 2003 Share Posted September 12, 2003 Ryan, for the heck of it, did you check for switched 12v on the black w/white that runs to the transistor/coil? Does the yellow wire at the transistor ohm out all the way back to the eccs? Just shooting ideas around... Quote Link to comment Share on other sites More sharing options...
DatsunBoy77 Posted September 12, 2003 Author Share Posted September 12, 2003 Yeah i get full voltage at the coil and at the power module. I have checked that wire and followed it back but never checked the ohm's on it. Maybe i will try that later. Quote Link to comment Share on other sites More sharing options...
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