laidbackjay Posted July 24, 2015 Share Posted July 24, 2015 I have a 1995 XJ600S, it runs on the 2 centre cylinders but not the outers. I have swopped the coils around but she won't start. Which makes me think i need to replace one of the coils. Although this won't fixvthe problem as the 2 outers should have fired when i swopped the coils? Would the pick up coil affect only one of the coils? I get the feeling that my problem is a very easy fix. Any help will be greatly appreciated Link to comment Share on other sites More sharing options...
Tommy xs Posted July 24, 2015 Share Posted July 24, 2015 Yes think that's were your problem lies, the pickup coils I had the same on my twin and was only firing on one cylinder luckerly I had a spare motor and swapped them over. Link to comment Share on other sites More sharing options...
laidbackjay Posted July 24, 2015 Author Share Posted July 24, 2015 Thanks for answering so quickly. I will have a go at swopping the pick up coil from my donor xj. So am I correct in saying that the pick up coil operates the coils individually? Link to comment Share on other sites More sharing options...
Moderator drewpy Posted July 24, 2015 Moderator Share Posted July 24, 2015 it depends on which year is your xj, the '91 has one pickup coil, earlier ones had 2. Link to comment Share on other sites More sharing options...
laidbackjay Posted July 24, 2015 Author Share Posted July 24, 2015 Drewpy it's a 1995 Link to comment Share on other sites More sharing options...
Moderator drewpy Posted July 25, 2015 Moderator Share Posted July 25, 2015 these have one pickup coil. its a wasted spark system so 1 and 4 cyl sparks and so does 2 and 3 so I'd look at the coil. First look to see if 12v is reaching the coils with the ignition on. The TCI earths to ground to complete the circuit, also check the HT caps as they fail too. I assume you've swapped the plugs in case they are faulty? Link to comment Share on other sites More sharing options...
laidbackjay Posted July 25, 2015 Author Share Posted July 25, 2015 I have checked the voltage to the coios with ignitiin on. They both read 18v yes eighteen.Yes i have swapped the plugs and plugs are fine.I swapped coils over and still 2 and 3 fired nothining on 1 and 4.Thanks for your help so far. More would be very much welcomed Link to comment Share on other sites More sharing options...
Moderator drewpy Posted July 25, 2015 Moderator Share Posted July 25, 2015 do you have a spare TCI? Link to comment Share on other sites More sharing options...
laidbackjay Posted July 25, 2015 Author Share Posted July 25, 2015 I have just been out to try swapping the wires around on the coils. I have managed to move the the sparking from 2 and 3 to 1 and 4. I have a 2nd hand ecu/cdi box on order. Is this the same as TCI?ThanksJason Link to comment Share on other sites More sharing options...
Moderator drewpy Posted July 26, 2015 Moderator Share Posted July 26, 2015 I have just been out to try swapping the wires around on the coils. I have managed to move the the sparking from 2 and 3 to 1 and 4. I have a 2nd hand ecu/cdi box on order. Is this the same as TCI?ThanksJasonyep, CDI went out early 70's could be either the ignition caps or leads if you can get 1 and 4 to work Link to comment Share on other sites More sharing options...
laidbackjay Posted July 26, 2015 Author Share Posted July 26, 2015 Thanks drewpy for all your help. I have ordered the parts I need. I will update you as soon as I have recieved and fitted them. Link to comment Share on other sites More sharing options...
laidbackjay Posted July 30, 2015 Author Share Posted July 30, 2015 Drewpy thanks for all your help. New TCI arrived today and BOOM I have 4 cylinders again. You legend Link to comment Share on other sites More sharing options...
Moderator drewpy Posted July 30, 2015 Moderator Share Posted July 30, 2015 Drewpy thanks for all your help. New TCI arrived today and BOOM I have 4 cylinders again. You legend nice one just one more thought. the cause of the TCI going could be a faulty reg/rec check the charging on the battery with the engine running,it should be no more than 14.5 volts @ 3k revs could be why you had 18v to the coils 1 Link to comment Share on other sites More sharing options...
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